Newsgroup sci.engr.mech 29015

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Are you sure it's not a Magnesium alloy?  
An M followed by 5 digits could be a Magnesium alloy, under the 
American Unified Numbering System.
Mark
-- 
Mark Thornton				Tel: +44 1223 332760
Cambridge University Eng. Dept.		Fax: +44 1223 332662
Trumpington Street			E-mail: mht11@eng.cam.ac.uk
CAMBRIDGE CB2 1PZ, UK			
http://www2.eng.cam.ac.uk/~mht11/

Can someone recommend a good source or reference on transmission/gearbox
design and analysis?
Thanks!
---------------------------------==||==------------------------------
R. Barry Walden                  (@__@)
U. S. Naval Research Laboratory  / || \   
Code 5712.1                     /  ||  \  
Phone: 202-767-5972             |__||__|  
walden@kahuna.nrl.navy.mil       \_##_/   
                                 /    \
		                O      O

Three books which I can heartily recommend:
1) Vector Mechanics for Engineers: Statics and Dynamics
   by Beer and Johnston
   ISBN 0-07-079923-7
   McGraw-Hill  1-800-262-4729
   On-line catalog at http://www.infor.com:533311/about.shtml
This is the one I have.  By the way everything by Beer and Johnston is 
excellent.
2) Engineering Mechanics Statics and
   Engineering Mechanics Dynamics set
   by Miriam and Kraig
   ISBN W 0-471-12491-5
   Wiley inquiries (908) 469-4400
   On-line at http://www.wiley.com/ProductInfo.html
This is also an excellent set of books and probably the one I would have 
bought except I thought it was a bit to pricey.
3) Engineering Mechanics: Statics and Dynamics
   by Hibbeler
   ISBN 0-02-354081-8
   Macmillan Publishing  (212) 702-2000
                         (800) 257-5755
I think you'd be happy with either of these.  I personally chose the 
first because of the combination of quality, price, and convenience of 
purchase.  Fortunately, I have access to a good technical library and was 
able to study each of these before committing to a purchase.
Hope this is helpful.
Regards, 
Phil

Superior Design Co., Inc., has provided quality and dependable
engineering, design, drafting, 
information systems and other technical contract labor services for the
past 39 years.  We provide 
contract staffing services to a wide spectrum of customers prominent in
many industries, including aircraft-aerospace, computer, electronics,
financial, government, manufacturing, medical, public utility,
semiconductor and telecommunications.
Plastics Tooling Engineers - BS Degree in mechanical or plastics
engineering, 5+ years experience in plastics/tooling environment. 
Person will prepare tooling plans for new and revised products; design
and develop plastic parts; approve mold design specs and layouts;
coordinate the quotation, sourcing and follow-up of mold
construction/delivery; debug molds and plastic product designs.
Mold Flow Analysis Engineer - BS Degree in mechanical or plastics
engineering, 8+ years hands-on experience with MF gas analysis,
MoldFlow, C-Flow, and Pro/ENGINEER.  Person will provide technical
support utilizing flow analysis technology to the global manufacturing
network; provide product development support for application of
gas-assist technology; assume leadership role for training and
development in these advanced technologies worldwide.  Good
communication skills a must and injection molding experience important. 
If interested in this employment opportunity or any others that we many
have on an ongoing basis, email a resume or contact me at:
Tony Casciano
Superior Design Co.
250 International Drive
P.O. Box 9057
Williamsville, NY 14231-9057
email:  cascianot@buff.supdes.com
800.568.8310 ext. 222
716.633.7985 /fax
View Web Site at: www.supdes.com

Superior Design Co., Inc., has provided quality and dependable
engineering, design, drafting, 
information systems and other technical contract labor services for the
past 39 years.  We provide 
contract staffing services to a wide spectrum of customers prominent in
many industries, including aircraft-aerospace, computer, electronics,
financial, government, manufacturing, medical, public utility,
semiconductor and telecommunications.
Plastics Tooling Engineers - BS Degree in mechanical or plastics
engineering, 5+ years experience in plastics/tooling environment. 
Person will prepare tooling plans for new and revised products; design
and develop plastic parts; approve mold design specs and layouts;
coordinate the quotation, sourcing and follow-up of mold
construction/delivery; debug molds and plastic product designs.
Mold Flow Analysis Engineer - BS Degree in mechanical or plastics
engineering, 8+ years hands-on experience with MF gas analysis,
MoldFlow, C-Flow, and Pro/ENGINEER.  Person will provide technical
support utilizing flow analysis technology to the global manufacturing
network; provide product development support for application of
gas-assist technology; assume leadership role for training and
development in these advanced technologies worldwide.  Good
communication skills a must and injection molding experience important. 
If interested in this employment opportunity or any others that we many
have on an ongoing basis, email a resume or contact me at:
Tony Casciano
Superior Design Co.
250 International Drive
P.O. Box 9057
Williamsville, NY 14231-9057
email:  cascianot@buff.supdes.com
800.568.8310 ext. 222
716.633.7985 /fax
View Web Site at: www.supdes.com

James Dunn  writes:
re:  cold draft from heat pump closet
I didn't think a keg would fit in there!
-- 
___________________________________________________________________
  Jimmie G. McEver, III	     | Chairman, Student Advisory Council
  638 Wood Ridge Court       | Internet: gt8952a@prism.gatech.edu
  Atlanta, GA  30339         | Pager:    (404) 833 - 1077

Get ABAQUS and know what you are modelling (i.e. is buckling a
possibility, is plastic behaviour important, can you do a classical calc
somewhere to check the analysis, do you know what sufficient resolution
looks likes, etc.). IMHO, you need to know what physical behaviours are
possible, generally how the FEA procedure works and what does the right
answer look like.  
Enrique Juaristi wrote:
> 
> I'd like to discuss an interesting topic.
> 
> After a discussion with one of my colleagues, I came to the following
> conclusion:
> it is possible to do FEA analysis with existing software, without ever
> having studied FE theory, because it is never used as such in the actual
> analysis and the software does everything. But I'm convinced that you do
> need some knowledge of what you're doing in order to do the right choices.
> After all, FE is a "garbage in, garbage out " tool...
> 
> What do you think?
> 
> --
> Enrique Juaristi, mechanical engineer

The Department of Mechanical and Industrial Engineering at the
University of Massachusetts at Amherst is inviting applications for
graduate study and research in the area of mechatronics,
electromechanical systems, instrumentation, manufacturing and design. 
Two funded graduate positions are currently available within Professor
Gao's research group:
M.S./Ph.D. Mech. Engr. or Manufacturing 
Design, simulation, and implementation of sensor-embedded "smart"
electromechanical structures and systems for real-time manufacturing
processes control and optimization.  The candidate should have a strong
background in one or more of the following areas: dynamics,
electromechanical systems, analog and digital circuits design,
microprocessor applications, etc.  Also, he/she be strongly interested
in pursuing interdisciplinary research. 
For detailed information, please contact Prof. Robert Gao via electronic
mail (gao@ecs.umass.edu) or phone (413-545-0868).

In <32A52C04.7D6B@ix.netcom.com> Chris Maass 
writes: 
>
>This is a multi-part message in MIME format.
>
>--------------1105354D1EA4
>Content-Type: text/plain; charset=us-ascii
>Content-Transfer-Encoding: 7bit
>
>Sam I Am wrote:
>> 
>> Hello all!
>> 
>> Does anyone know of a good mail-order source for technical books?
>> My school only carries the books neede for the courses being offered
>> during the semester. If anyone has any info to offer I would very
much
>> appreciate it!
>> 
>> Dan McAllister
>> mcallist@eden.rutgers.edu
>
You can try the web pages of McGraw Hill, or John Wiley, or Elsevier
publishers. They usually publish most of the technical books. You can
also find the home pages of other publishers. Now almost all the
publishers are in the internet, and you can order them directly through
the web pages. 
Here are two sites I visit often. 
    http://www.elsevier.com/
    http://www.wiley.com/    
Good Luck,
Venkatesh Kannan. 

billmcc wrote:
> 
> Get ABAQUS and know what you are modelling (i.e. is buckling a
> possibility, is plastic behaviour important, can you do a classical calc
> somewhere to check the analysis, do you know what sufficient resolution
> looks likes, etc.). IMHO, you need to know what physical behaviours are
> possible, generally how the FEA procedure works and what does the right
> answer look like.
> 
I must agree with you Bill. I have found many an error for my stress
analysis friends. Thet didn't know how the structure should be acting
and didn't notice discrepancies between what their analysis said it was
doing and what it really should be doing, errors caused by incorrect
constraints, wrong sign for load direction and other simple mistakes. I
work on pressure stabilized thin wall tanks, have been for a few years,
and my analysis people are new to this kind of structure. Aren't mergers
fun!

The Dudley Gear Handbook is the everything you wanted to know about
gears book. The case is another issue. I looked for a good book on cases
before but in the end you need to do the gear calc's to get the
separating loads and from those you can do the case. NASA Lewis is the
lab if this your interest. Erwin Zaresky at NASA Lewis I believe has
done alot of work on rotorcraft gear boxes. The outfit that worte TK
solver has some programs for gear train calculation (UTS Software,
Rockford IL).
BillMcEachern
billmcc@dynamotive.com
walden@kahuna.nrl.navy.mil wrote:
> 
> Can someone recommend a good source or reference on transmission/gearbox
> design and analysis?
> 
> Thanks!
> 
> ---------------------------------==||==------------------------------
> R. Barry Walden                  (@__@)
> U. S. Naval Research Laboratory  / || \
> Code 5712.1                     /  ||  \
> Phone: 202-767-5972             |__||__|
> walden@kahuna.nrl.navy.mil       \_##_/
>                                  /    \
>                                 O      O

typically you get the deformations from the original shape. You would
have to add the deformations to the original undeformed shape to get
what you want. You might also want a different code (say ABAQUS) as my
experience in ANSYS for non-linear problems was less, way less, than
fun.
Bill McEachern
billmcc@dynamotive.com
Milind C Mujumdar wrote:
> 
>   i am using ANSYS (VER 5.2) for carrying out elastic plastic analysis.
> i would like to know if ANSYS gives the coordinates of the deformed
> model at the end of elastic - plastic anslysis ?
> i would like to use the same for further analysis.
> 
> if sombody has the answer please reply at following email address.
> 
> mmilind@skypak.aero.iitb.ernet.in
>   milind c. mujumdar
>   dept. of aerospace engg,
>   indian institute of technology , powai,bombay.
> 
>

UTS Software, Rockford, IL.
Tony Rickson wrote:
> 
> I am looking for a suitable software package to calculate gear geometry
> and stress analysis.
> 
> Can anyone help.
> 
> cheers
> 
> Tony

I can speak from the perspective of having used Finite element packages
before and after having some formal instruction in the theory behind it.
The most important thing I learned was what it meant to have a properly
constrained model and why this was essential for solving.  Other things
I learned about that helped my understanding (and allowed me to create
better FEA models) were aspect ratio and the relationship between
element density and stress gradients.  
Additionally, when modeling, there a lot of simplifications/assumptions
that are made and you need to know what affect these will have on
accuracy.  So, I think a little bit of formal training can go a long way
in improving the quality and accuracy of the FE models that you can
create. 
So, in answering your first question, YES, it is possible to do FEA
analysis, but it is a lot easier if you have some training in the
theory. 
Keith Hooks
Graduate Student
Mechinical Engineering

I am looking for help on equipment needed for ultrasonic testing, or
ultrasonic nanoscopes from those who currently have access to such an
equipment, own it, or have used it.
Thanks a lot!
lbliao

In article <56slkc$pj2@camel0.mindspring.com>,  writes:
> Path: 
castle.nando.net!news-out.internetmci.com!peerfeed.internetmci.com!howland.erol
s.net!www.nntp.primenet.com!nntp.primenet.com!news.mindspring.com!usenet
> From: bryanteng@pipeline.com (M. H. Lyle, PE)
> Newsgroups: 
comp.cad.autocad,alt.cad.autocad,alt.cad,sci.engr.manufacturing,sci.engr.mech,a
lt.sys.intergraph,comp.cad
> Subject: Re: BUYER BEWARE - EPSON AMERICA
> Date: Tue, 19 Nov 1996 16:02:21 GMT
> Organization: MindSpring Enterprises, Inc.
> Lines: 52
> Message-ID: <56slkc$pj2@camel0.mindspring.com>
> References: <3291D8D4.7797@iccom.com>
> Reply-To: bryanteng@pipeline.com
> NNTP-Posting-Host: ip231.richmond2.va.interramp.com
> X-Server-Date: 19 Nov 1996 16:01:16 GMT
> X-Newsreader: Forte Free Agent 1.0.82
> Xref: castle.nando.net comp.cad.autocad:48574 alt.cad.autocad:41251 
alt.cad:15938 sci.engr.manufacturing:15428 sci.engr.mech:32529 
alt.sys.intergraph:7681 comp.cad:142
> 
> ben crane  wrote:
> 
> >My Epson Action Laser is on its fourth ream of paper and the drum unit
> >is shot.  A new replacement (my only option) costs from $180 to $240
> >depending on who I call.  It's warranted for 30,000 copies or 18 months.
> >The printer is almost four years old.
> 
> >I called Espon America customer support and suggested a drum unit should
> >last for more than 2,000 copies no matter how old it is.  I was told
> >that the drum is made of organic material and is only good for 18 months
> >OR 30,000 copies.  The lady told me the drum material is like tires,
> >whether you drive on them or not they still have a life cycle.
> 
> >What would anyone do if they bought a set of 60,000 mile tires and after
> >4,000 miles the rubber fell off, regardless of age?  Assume of course
> >they are properly maintained, driven once in a while, and kept in a
> >heated garage when not in use.
> 
> >Epson stood by their policy.  There was no acknowledgment of a faulty
> >product, no offer of a discounted replacement drum.  In fact I was told
> >I was lucky to get four years out of the thing, even though the power
> >was off the majority of the time.
> 
> >So, beware of Epson products.  Think before you buy.  I am cutting my
> >losses and have already bought a bright shiny new Hewlett Packard.  I
> >will NEVER BUY ESPON again!!!!
> 
> >P.S. Espon reps if you're out there -
> > As CAD Manager for an Engineering department, I'm responsible for
> >speccing out engineering computer tools.  Guess who's not on my short 
> >list...
> 
> >For Sale:
> >  Action Laser II
> >  Extra memory upgrade
> >  Hardly used, less than 2,000 copies
> >  Environmently friendly, uses organic parts
> >  needs new drum unit
> >  Make offer
> 
> >Ben Crane
> >CAD Manager, A-dec, Newberg Oregon
> 
> --
> 
> Still, yet another argument for bubble jet printers.
> 
> remember the KISS principle?
> --
> 			M. H. Lyle, PE
> 			bryanteng@pipeline.com
> 
> 
I agree.  My Cannon BJ230 (wide carrage version of the bj200) has spit out many 
a schematic sheet (and everything else!) over the last 3 years.  It's slow, but 
sure. 
jamie blackwell
--------------------------------------------------------------------------
MicroGreen Products, Inc
Energy Management Products Home, Office, and Industrial Settings
Visit our web site at http://www.microgreen.com
--------------------------------------------------------------------------

Enrique Juaristi wrote:
> 
> I'd like to discuss an interesting topic.
> 
> After a discussion with one of my colleagues, I came to the following
> conclusion:
> it is possible to do FEA analysis with existing software, without ever
> having studied FE theory, because it is never used as such in the actual
> analysis and the software does everything. But I'm convinced that you do
> need some knowledge of what you're doing in order to do the right choices.
> After all, FE is a "garbage in, garbage out " tool...
> 
> What do you think?
This is a topic that has come up here in the past, and resulted
in heated debates.  Most of those involved probably don't
want to repeat everything they said, so you may want to check 
the archives.
My opinion is that you don't need to know FE theory to use the 
commercial FEA available software today.  Knowing how to derive a 
shape function is not going to help you use a code effectively.
What you do need is a good background in the field of the
problem you are studying (statics, dynamics, heat transfer,
acoutics, etc) so that you will be able to apply meaningful
loads/bc's and interpret the results.
You also need some practical training/experience in how to use FEA 
to get good results.  How to simplify real world problems so that 
they can be solved. How to convert real world loads and boundary 
conditions into those required by the code.  How to understand
and interpret the results that are being displayed by the postprocessor.  
Unfortunately this kind of training seems to be very rare.  Usually what 
you find are unversity courses where students learn theory and virtually 
write their own crude FEA software, or classes on using commercial FEA 
codes which focus on how to push the buttons to mesh, setup, and solve
problems.  Most people become proficient with FEA through experience, 
making a lot of mistakes along the way.
There is an organization in England called NAFEMS which is very much 
concerned with use and misuse of FEA.  They have a web site you may 
want to check out.  You can find info at:
  http://www.nafems.org/
They produce a magazine named Bench Mark which has articles on these 
kind of topics.  They have been pushing for some kind of certification 
process that could be applied to FE analysts to ensure that they are 
using it correctly.
____________________________________________________________________________
John Scheffel					Design Computing Services 
E-mail:	john_scheffel@sj.hp.com			Hewlett Packard
Tele:	(408) 435-6473				Optical Communications Div.
FAX:    (408) 435-4565				370 W. Trimble Rd. M/S 90-LH
URL:	http://www-dcs.sj.hp.com/DCS/jns.html	San Jose, CA. 95131
____________________________________________________________________________

Y. T. Qi  wrote in article <32A75113.4888@SoCA.com>...
> I want to compare the reliability of finite elements and FEA packages.
> Would someone tell me where can I get the benchmark tests? Hopefully, 
> these problems are relatively simple and results from some major
> FEA commercial software (like NASTRAN, ANSYS) are included?
> Thanks in advance.
> Y.T. Qi
Dr Everstine was maintaining the benchmarks, last I heard...
Gordon C. Everstine                     (301) 227-4410
Computer Modeling & Simulation (26)     FAX (301) 227-5753
Naval Surface Warfare Center            geversti@oasys.dt.navy.mil
Carderock Division                      Building 192, Room 128
9500 MacArthur Boulevard
West Bethesda, Maryland 20817-5700 U.S.A.
---
Grace + Peace   *   Peter N Roth  *   Engineering Objects International
Software Development & Training in Delphi & C++

I want to compare the reliability of finite elements and FEA packages.
Would someone tell me where can I get the benchmark tests? Hopefully, 
these problems are relatively simple and results from some major
FEA commercial software (like NASTRAN, ANSYS) are included?
Thanks in advance.
Y.T. Qi

Bill-
Dudley is, of course an excellent source. Some others are -
	Gear Design by Drago
	Gear Handbook and Calculations by Stokes
	High Performance Gear Design by Stokes
	Gear Design and Application by Chironis
	Source Book of Gear Design and Application ASM publication
and numerous AGMA publications. Ask for a catalog from AGMA 703/684-0211
but orders for AGMA documents must be placed with Gobal Engineering
Documents 800/854-7179. 
Good luck
-- 
Robert B. Price, C.Mfg.E.
Automation*Gears*Machinery
 gearknox@capital.net

In article <587s3f$fic@james.freenet.hamilton.on.ca>, ad784@james.freenet.hamilton.on.ca (Garry Boychuk) wrote:
>In article <32A6DA63.275@eng.cam.ac.uk>, Mark Thornton  wrote:
>>Are you sure it's not a Magnesium alloy?  
>>
>>An M followed by 5 digits could be a Magnesium alloy, under the 
>>American Unified Numbering System.
>>
>>Mark
>>-- 
>>Mark Thornton				Tel: +44 1223 332760
>>Cambridge University Eng. Dept.		Fax: +44 1223 332662
>>Trumpington Street			E-mail: mht11@eng.cam.ac.uk
>>CAMBRIDGE CB2 1PZ, UK			
>>http://www2.eng.cam.ac.uk/~mht11/
>
>Sorry if this is off topic, just checking my OLMR capabilities. Have been having mixed success posting followups to news groups. ciao!
>-- 
>Garry N. Boychuk, P.Eng.
>
>-- 
>Garry N. Boychuk, P.Eng.
-- 
Garry N. Boychuk, P.Eng.

-- 
Garry N. Boychuk, P.Eng.

:it is possible to do FEA analysis with existing software, without ever
:having studied FE theory, because it is never used as such in the actual
:analysis and the software does everything. But I'm convinced that you do
:need some knowledge of what you're doing in order to do the right choices.
      ^^^^^^^^^^^^^^
some knowlege seems right.  It seems that if you came at the subject
in the right way you could learn the essentials needed for running
a canned package without knowing much at all about the core theories
involved.
-- 
george 	
george@mech.seas.upenn.edu

Chris  wrote:
>Nägel wrote:
>> 
>> John H. wrote:
>> 
>> > One who does Drafting via CAD is a CAD Technician.  A person on a
>> > Survey Crew is a Survey Crewman (composed of an Instrument man, a
>> > Rodman and sometimes a Chainman - NOTE:  replace person in place of
>> > MAN to be politically correct!)
>> 
>> I don't like the sound of technician, it makes me feel like I have a
>> headset on and saying "can I take your order, and would you like me to
>> include our free catalog"  I've also heard the term CAD Operator but
>> that's even worse.
>> 
>> Looking at my collage diploma (which was only a 2 year course) it
>> clearnly states "Commercial Engineer".  I've been calling myself that
>> for years and nobody has gave me a hard time about it,...... yet....
>If you just draw and let someone else feed you drawing you may be called
>a CAD Drafter. If you actually do the design work you may be called a
>CADD Designer of CADD Design-Drafter. If you aslo do the engineering
>such as stress analysis you may be called a CADD Engineer.
This all seems pretty inconsequential to me.  One who drafts using CAD
is a Draftsman (or person), one who designs using CAD is a desinger,
and an engineer who uses CAD is still an engineer.
This discussion reminds me of one in medicine severa years ago.
Surgeons that used a microscope during surgery wanted to be
"microsurgeons" until someone asked how short you had to be in order
to be a "microsurgeon"!
Greg McArthur
Sr. Engineer
Merit Medical Systems, Inc.
gregm@xmission.com

                     FIRST CALL FOR VOTES (of 2)
               unmoderated group sci.engr.joining.misc
              unmoderated group sci.engr.joining.welding
Newsgroup lines:
sci.engr.joining.misc	Joining of materials for manufacture & repair.
sci.engr.joining.welding	Welding of materials for manufacture & repair.
Votes must be received by 23:59:59 UTC, 27 Dec 1996.
This vote is being conducted by a neutral third party.  Direct
questions about the proposed group to the proponent.  Do not
distribute this CFV or the information contained in it in any form
without the votetaker's permission.
Proponent: Dr. Martin P. Jones 
Proponent: Matthew W. White 
Mentor: Jonathan Grobe 
Votetaker: Jim Davis 
RATIONALE: sci.engr.joining.misc
Materials joining plays an integral role in the fabrication,
manufacturing, and repair of virtually all structures and devices.  These
operations are a significant source of added value and have a major impact
on reliability and performance.  The technologies associated with successful
joining of materials span a wide range of engineering and scientific
disciplines.  Advances in materials, design, manufacturing and industrial
engineering, process control and automation all interact to increase the
complexity of each joining application.  A newsgroup dedicated to discussion
of joining-related issues will greatly facilitate communication between
scientists, engineers, and manufacturers with common challenges.  It would
also provide a platform for cross-disciplinary exchange on joining-related
issues.  The newsgroup, sci.engr.joining.misc, is proposed, not as a catchall
group, but as a rational starting point for joining related groups under the
sci.engr.joining hierarchy.
RATIONALE: sci.engr.joining.welding
Welding is one of the most common joining processes utilized in manufacturing
and fabrication today.  The International Institute of Welding/Institut de
Soudure currently identifies over 140 separate welding processes and allied
technologies, ranging from arc welding for thick section steel fabrication to
the wire bonding processes used in electronics manufacture. These operations
are a significant source of added value and have a major impact on system
reliability and performance.  The technologies associated with successful
welding span a wide range of engineering and scientific disciplines.
Advances in materials, design, manufacturing and industrial engineering,
process control and automation all interact to increase the complexity of each
joining application.  A recent Deja News search revealed over 4,000 posts on
welding-related topics across USENET.  This indicates more than sufficient
interest to create a welding newsgroup.  A newsgroup dedicated to discussion
of welding topics will greatly facilitate communication between scientists,
engineers, and manufacturers with common challenges.  It would also provide a
platform for cross-disciplinary exchange on welding-related issues.   The
newsgroup sci.engr.joining.welding is proposed for the exchange of scientific
information and technical discussion of welding issues.
CHARTER: sci.engr.joining.misc
A newsgroup dedicated to the exchange of scientific information and
discussion of technical issues relating to the general joining of
materials for manufacture and repair.  Anyone interested will be
welcome to participate in discussions about, but not limited to:
1..  Joining methods: mechanical fasteners, adhesive, thermal spraying.
2.  Other disciplines impacted by joining: nondestructive testing,
quality control, mechanical testing, materials engineering, structural
design.
3.  Professional society activities related to joining: Adhesion
Society of Japan, American Welding Society, Croatian Welding Society,
Japan Welding Society, International Institute of Welding, ASM
International, ASME International, American Society for Testing and
Materials, American Society for Nondestructive Testing, British Institute
of Non-Destructive Testing
4.  Employment opportunities within the joining technology field.
5.  Educational resources and events.
6.  Upcoming conferences related to joining.
In keeping with the tradition of sci.engr, on-topic sales material and
advertisements are acceptable within this newsgroup under the condition that
embedded within it is useful, non-product-specific and free information.
Examples of such advertisements would include:  new or improved textbooks
and software; new or updated WWW sites; course or lecture announcements; and
job listings.   Advertising which requests that no e-mail replies be made to
their postings, uses false e-mail return addresses, is blatantly off
topic, or promotes illegal schemes or purposes is unwelcome.  Responses to
inappropriate advertisements should be made directly to the senders and their
service providers and not posted to the newsgroup.
Binaries are not permitted on this newsgroup.
Note: This newsgroup will have a gateway to a dedicated mailing list
so that people who do not have access to Usenet newsgroups will be
able to read and post messages to the newsgroup via e-mail.
END CHARTER.
CHARTER: sci.engr.joining.welding
A newsgroup dedicated to the exchange of scientific information and
discussion of technical issues relating to the joining of materials by
welding for manufacture and repair.  Anyone interested will be welcome
to participate in discussions about, but not limited to:
1.  Welding methods: resistance welding, arc welding, brazing, oxyfuel
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In article <32A6DA63.275@eng.cam.ac.uk>, Mark Thornton  wrote:
>Are you sure it's not a Magnesium alloy?  
>
>An M followed by 5 digits could be a Magnesium alloy, under the 
>American Unified Numbering System.
>
>Mark
>-- 
>Mark Thornton				Tel: +44 1223 332760
>Cambridge University Eng. Dept.		Fax: +44 1223 332662
>Trumpington Street			E-mail: mht11@eng.cam.ac.uk
>CAMBRIDGE CB2 1PZ, UK			
>http://www2.eng.cam.ac.uk/~mht11/
Sorry if this is off topic, just checking my OLMR capabilities. Have been having mixed success posting followups to news groups. ciao!
-- 
Garry N. Boychuk, P.Eng.

-- 
Garry N. Boychuk, P.Eng.

Announcing the
9th International Conference on
TRANSPORT AND SEDIMENTATION OF SOLID PARTICLES
Dates: 2-5 September 1997, 
Cracow, Poland 
For more information visit our page:
http://www.ar.wroc.pl/T&S;
-- 
   ----------------------------------------------------------------
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              pl. Grunwaldzki 24
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In <19961204133200.IAA29841@ladder01.news.aol.com>, lavan123@aol.com writes:
>Hi,
>
>I'm looking to buy two good books.  One on Engineering statics,  the other
>Engineering Dynamics.
I used Russ Hibbeler's books.  Called "Engineering Mechanics - Statics"
and "Engineering Mechanics - Dynamics".
Note sure what version they're up to now; it's been a while.  He takes a
very vector-oriented approach.
I now find them good as references.  The Dynamics book doesn't even
mention Lagrangians, though.  (Though if you try hard enough, Shaum's
has a book on it.  Hard to find, though.)
Ahh, found one.  The "Engineering Mechanics - Dynamics" book I have is
the 5th edition, ISBN 0-02-354661-1.   Published by MacMillan.  Don't have
info on the Statics book - it's at work right now.  :-)
      program signature
      write(*,*),'Dan Stephenson'
      write(*,*),'dano@cyberramp.net'
      stop
      end

Mark Thornton wrote:
> 
> Can anyone tell me what the purity of "pure gold" is?
> 
> This is not such a stupid question as it sounds.....
> 
> The American Society of Testing and Materials have a standard (B562-86)
> for "Refined Gold", which gives 4 grades of gold, with purities of
> 99.5%, 99.95%, 99.99% and 99.995%.
> 
> Can anyone tell me which grade is the one that is traded on the world's
> gold markets?
> 
> Thanks in advance for all help received.
> 
> Mark
> --
> Mark Thornton                           Tel: +44 1223 332760
> Cambridge University Eng. Dept.         Fax: +44 1223 332662
> Trumpington Street                      E-mail: mht11@eng.cam.ac.uk
> CAMBRIDGE CB2 1PZ, UK
> http://www2.eng.cam.ac.uk/~mht11/
It's 99.99%, also known as bankers-gold

Combustion Dynamics  writes:
>	I'm currently looking for papers that address the rigid body analysis 
>of multiple body systems.  I was wondering if anybody has any good 
>references which they could share with me.  Also, if anybody could 
>supply me with the names of any codes that perform this type of 
>analysis, it would be appreciated.
I do mostly dynamic simulation of rigid bodies, so I'm not sure if
that's what you mean by "rigid body analysis," but here are some good
references off the top of my head:
Computational Dynamics, by Shabana (Wiley Interscience, I think)
Dynamics: Theory and Applications, by Kane and Levinson (McGraw Hill?)
Dynamic Analysis of Robot Manipulators: A Cartesian Tensor Approach, by
Balafoutis and Patel (Kluwer)
Look for papers on the web by Baraff, Trinkle, Bhatt, Witkin, etc.
I hope that helps.
Chris

I am looking for rotating-bending fatigue data for a BS 2772 Grade 150M19 
steel. If you have such data, or know where I can get it, I would be grateful 
if you let me know on Email address pfernan@csir.co.za.
Thank you
Paulo Fernandes

I am looking for stress intensity factors for cracks (thumb-nailed shaped or 
straight fronted) in shafts subject to bending loads. If you can help me, 
please contact me on Email address pfernan@csir.co.za.
Thank you
Paulo Fernandes

> 
> Adam C. Browne (acb4@Ra.MsState.Edu) wrote:
> 
> : Are there are any colleges or universities whose mechanical
> : engineering programs scheduled for more than four years.  This would not
> : include cooperative education programs or internships.
> 
It is my impression that most state schools still require something
in excess of 140 credits, which can be difficult to accumulate in
only 4 years.  However, officially, the programs are 4 years programs.
All private universities that I know of specifically have requirements
more on the order of 126 credits, which can be completed in 4 years.
The cost of tuition at private schools will make any 5 year program
for a BS uncompetitive against the MS degrees that are awarded after
5 years at most private schools.
It is also my impression that the practice of charging per credit hour
encourages students to slow down their program and so it is very 
typical to stretch out to 5 years.  I believe I remember a statistic
that 60% of the engineering degrees at state schools are completed in 5
years.  Again there is a big difference freom the private schools, who
typically charge a flat rate per year.

I'm a high school Physics student in search of information concerning
the design/specifications for building a "toothpick" bridge. Does anyone
have expertise or advise on the process?
Thanks
dwfishe@nswc.navy.mil

"Assefa A."  wrote:
>Greetings all, 
>I am a new comer to this newsgroup. I would like to raise a question
>regarding vehicle suspension. In vibration class we used to represent the
>car suspension system, with the body(engine,payload,chasis,etc) linked to
>the axles by the suspension springs (and dampers). What puzzles me now is
>that what mechanical member is supposed to transmit lateral and
>longuitudinal forces between the body and the axles? For example when the
>car is acclerated (or braked) there will be inertia force of the
>body,tending to take it away from the axles.
>Thanks
>Assefa 

Paulo Fernandes wrote:
> 
> I am looking for stress intensity factors for cracks (thumb-nailed shaped or
> straight fronted) in shafts subject to bending loads. If you can help me,
> please contact me on Email address pfernan@csir.co.za.
> 
Depending on how sophisticated you wish to get, you can use one of the
following
three "levels":
Level I:   Section 9 in "SIF Handbook," Vol 2, Ed. Y. Murakami, Pergamon
Press, 1987
Level II:  Fracture mechanics software for predefined crack shapes, such
as NASCRAC.
Level III: FE based discrete crack propagation software such as
FRANC-3D.
Hope that helps.
Sanjeev Srivastav
Failure Analysis Associates

Hello!
Does anybody have some experiance in cutting wood with a waterjet? The
wood is up to 50 mm thick. It is rubber-tree-wood, not a laminate.
Some engineers of the waterjet cut industry say it works with
problems, some say, it doesn´t work.
Thanks in advance,   Martin
Dipl.-Ing Martin Rudolf Schmidt
Germany
 0235121842-2@t-online.de

In article <01bbe1fa$203f17e0$0500a8c0@Philippe.alpha-c.com>, 
pcontal@alpha-c.com says...
>
>We are looking for a special material, called "M35152".
>
>We just know that it is a steel for stamping parts.
>
>Thank you to answer ar contact@alpha-c.com
>
Try www.cartech.com

In article <19961204133200.IAA29841@ladder01.news.aol.com>, 
lavan123@aol.com says...
>
>Hi,
>
>I m looking to buy two good books.  One on Engineering statics,  the 
other
>Engineering Dynamics.  I don t leave near a University, so I can t 
just
>peruse the bookstore.  Besides, they may not stock "the best."  Can
>someone recommend a well written, easily understood book ?  
Admittedly, it
>takes lots of detail for me to grasp concepts so great graphics and 
lots
>of examples would be desired.  MIGHT EVEN CONSIDER A book on CD if it 
has
>proven to be helpful.
>
>I intend to use the book with SHAUMS (sp) to refamiliarize myself with 
the
>topics.  If there is one book that covers both topics and is well 
written,
>even better.   If you have it, provide enough information so that I 
can
>find the book you recommend (name, edition and Author or even the ISBN 
#
>and the phone number to a company  Like brown s that sells it ).  I d
>appreciate any help you can provide. 
>
>thanks!
>
The are books from an author named "MERRIAM". I hope the spelling is 
correct. One book for static and the second for dynamic. I have studied 
from them when I was a student.

In article , 
enrique.juaristi@crpht.lu says...
>
>I'd like to discuss an interesting topic.
>
>After a discussion with one of my colleagues, I came to the following
>conclusion:
>it is possible to do FEA analysis with existing software, without ever
>having studied FE theory, because it is never used as such in the 
actual
>analysis and the software does everything. But I'm convinced that you 
do
>need some knowledge of what you're doing in order to do the right 
choices.
>After all, FE is a "garbage in, garbage out " tool...
>
>What do you think?
>
>-- 
>Enrique Juaristi, mechanical engineer
>
>
It can even become "garbage in, danger out" tool. If you have no 
sufficient background you can interpret the results in a wrong way and 
make wrong decisions and allow inapropriate design that can cost life.
You need to have the "sense of the physical meanings of strength of 
materials" to "know" when the results are nonsense or not.

One cannot properly perform an analysis with FEA software without an
understanding of FEA. FEA software is a tool that will produce invalid
results as easily as valid results. That said; FEA software can be used
by competant technicians under the guidance of FEA savvy engineers with
very reliable results, much as competant draftspeople can produce good
designs under the direction of engineers.
Just My $0.02
Glenn Capone
Enrique Juaristi wrote:
> 
> I'd like to discuss an interesting topic.
> 
> After a discussion with one of my colleagues, I came to the following
> conclusion:
> it is possible to do FEA analysis with existing software, without ever
> having studied FE theory, because it is never used as such in the actual
> analysis and the software does everything. But I'm convinced that you do
> need some knowledge of what you're doing in order to do the right choices.
> After all, FE is a "garbage in, garbage out " tool...
> 
> What do you think?
> 
> --
> Enrique Juaristi, mechanical engineer