Subject: Why does the ASME Y14.5 cost so much?
From: petem@qi2.com (Pete Miles)
Date: 11 Jan 1997 01:04:25 GMT
Does anyone know why the ASME Y14.5 dimensioning and tolerancing
handbook cost so much?
Our company just ordered several copies of this handbook.
Originally we planned on getting a copy for every engineer,
designer, and draftsman, but at 80 bucks a pop, we only
bought half as many.
Why does this book cost so much?
I really don't believe it costs 80 bucks to print this, and most
(if not all) of the information has been the same for many
years.
And how come we can only get this book from ASME? and not from
any book store?
For a non profit organization, this book is rather profitable.
Based on the useful information this book has, then why doesn't
the Machinery's Handbook cost $1000?
$80 for this book is insane.
Pete Miles
petem@qi2.com
Subject: LATHE & MILLING MACHINE MFGRS
From: samurai929@aol.com (Samurai929)
Date: 11 Jan 1997 08:03:48 GMT
Would anyone out here know where to find out about all the manufacturers
(US, Japanese, Swiss, and the rest) of lathe and milling machines? I know
some well known names like Bridgeport, Mitsubishi, Cincinnati Milacron,
etc. but I am also curious about other players in the game.
Also, some data on the market share, financial health and customer
experiences, and reputation of each of these players would be useful. I
have checked w/ my local library but they were not of any help. Any and
all help here would be appreciated. Thanks a lot.
Subject: Re: Help deciding college major in engineering
From: "B. Rozenas"
Date: Fri, 10 Jan 1997 22:23:20 -0500
weshound@ix.netcom.com wrote:
>
> Hi,
>
> I am currently a senior in high school and I want to pursure a carreer
> in mechanical engineering. I have noticed that some colleges offer a
> program in
> Mechanical Engineering and some offer a program in Mechanical
> Engineering Technology. My question is what is the difference and the
> drawbacks of one from the other. I have heard that the Technology
> program is less math and more geared towards lab work than office work.
> Can someone help me out? Thx
>
> -Scott G.
> weshound@ix.netcom.com
You have received good information, the BSMET program's tend to have
less math, less theory,and more practical application. I have known good
engineers with both types of degrees...depends on the person. Although I
think the degree is very important in obtaining your first job, I think
as time passes and you gain experience and respect from your co-workers,
the degree is less significant.
With that said, If you think you can handle the math, go for the BSME.
good luck
Bronie Rozenas
Subject: Re: FEA recommendation
From: Fahreddin Basegmez
Date: Fri, 10 Jan 1997 22:53:44 -0500
Mark Rhodes wrote:
>
> I am looking for recommendations for a commercial FEA package. My
> application is fairly specific. We are modeling a fused silica window under
> vacuum load (1 atm pressure difference across the two sides). The window is
> supported by an elastomer gasket (o-ring). We need to compue the stresses
> very accurately.We use the stress data to compute the stress induced
> bi-refringence which depends not on the peak stress but the integral of the
> stress through the window. Since the stress is roughly anti-symetric we are
> looking for a small delta between stresses on the order of 700 psi.
>
> We need an FEA package that is 3D, handles elastomers, is very accurate,
> and has output that we can adapt to our bi-refringence post processor. As
> for platform, we have an HP 715 but we are willing to buy an NT platform is
> that is more suitable.
>
> Please send recommendations to
> plasma99@llnl.gov
>
> Thanks.
I strongly agree that ABAQUS would be the most suitable one. I have been
using it to analyze incompressible hyperelastic materials. It also lets
you define your own material model. The only drawback is the user
interface. It takes some time to get used to it but I think it would be
a good investment to learn it since you can analyze the most intricate
contact problems with excellent accuracy. Also, their examples manual
has variety of different problems and is well written.
Fahri Basegmez
Subject: Re: Hoerner
From: cpollard@csn.net (Chris Pollard)
Date: 11 Jan 1997 05:26:18 GMT
Doug Milliken (bd427@freenet.buffalo.edu) wrote:
: On Tue, 7 Jan 1997, Charles Coughran wrote:
: > I think I have seen a mail order address for Hoerner's two
: > books, _Fluid-Dynamic Lift_ and _Fluid-Dynamic Drag_. Are
: > they still available?
: Suggest you try through:
: John Roby -- Aircraft Technical Literature (used books)
: 619-583-4264 (this is from an older catalog)
: 3703 Nassau Dr.
: San Diego, CA 92115
: Inside our copies of Hoerner is an address, but I believe that it is no
: longer valid... but here it is anyway -- maybe you could post here if
: it is still good??
: Hoerner Fluid Dynamics
: PO Box 342
: Brick Town, NJ 08723
No - this is the OLD address - his widow moved to Washington and I believe
still sells them - that is the only way to ge tthem.
Subject: Used 35,000 gallon stainless steel storage tanks for sale
From: "Chesapeake Equipment Exchange, Inc."
Date: Sat, 11 Jan 1997 03:36:43 -0500
FOR SALE:
(7) 35,000 GALLON STAINLESS STEEL STORAGE TANKS;
Manufactured by A-L Stainless, each tank has level probes, side bottom
outlet, front manhole, 10 horsepower agitator with 3 blade propeller.
capacity: 35,000 gallons or 1,325 hectoliters
diameter: 12' or 3.66 meters
height: 45' or 13.72 meters
All tanks are made of 304 stainless steel, seven units are available
For additional details please call or E-mail
---------------------------------------------------------------------
Chesapeake Equipment Exchange, Inc.
2434 Fait Avenue, Suite 100 * Baltimore, MD 21224-3620 * USA
Tel. 410-675-8205 * Fax 410-675-3761 * E-mail:gizzmo@erols.com
----------------------------------------------------------------------
Subject: piping stress analysis
From: engp3468@leonis.nus.sg (Zhu CunLin)
Date: 11 Jan 1997 08:15:33 GMT
I am a piping stress engineer with about 4 year experience. I got some
experience for critical piping stress analysis, e.g HP alloy piping, pump
piping,turbine piping, reactor piping , and jacket piping. However, I found
I still spend a lot of time to stress analysis, sometime I can not solve
problems my self.
I like to meet some friends who are piping stress engineer. We may discuss
problems and communcate , and improve our ability, increase experience.
Any kind discussion is wecome!
Today's question is :
what is the best way to check nozzle load for storage tank with a
small diamenter, API 650 gives the method for big diamenter storage tank???
and vendor did not supply nozzle allowable.
Thank you!
Subject: WTB: Personal FORTRAN 77
From: bill.weitze@engineers.com (Bill Weitze)
Date: Sat, 11 Jan 1997 03:39:00 GMT
TM> I am looking for a personal FORTRAN 77 compiler to be used on an IBM
TM>compatible PC under DOS. Most comercially availble compilers I know of
TM>use the FORTRAN 90 standard. Including MICROSOFT.
Try older versions of Microsoft FORTRAN; I use version 5.1, which
conforms to ANSI FORTRAN 77 (and then some). I bought it by mail order
from Surplus Software in 1995, http://www.surplusdirect.com,
1-800-753-7877, or 541-387-6000. They probably don't have it anymore,
but you can try.
------------------------------------------------------------------
Bill Weitze, PE:
Co-Sysop, The Engineers' Club BBS, (408) 265-3353, San Jose, CA
Executive Committee Member, ASME Santa Clara Valley
Senior Engineer, GE Nuclear Energy
bill.weitze@engineers.com opinions are mine
------------------------------------------------------------------
* OLX 2.2 * Bill Weitze is it!
Subject: Re: Drafting effect behind tractor-trailers
From: bnh5940@acs.tamu.edu (Blaine Hufnagle)
Date: Sat, 11 Jan 97 14:35:28 GMT
In article ,
"Robert C. Jacobson Sr." wrote:
>
>Anyone know where I can find some info on cars "drafting" behind
>tractor trailers? I want to know what effect it has on drag (ie
>MPG), and how close you'd have to be.
I've heard rumours to the effect that small vehicles (like a Geo Metro) can
get up in the draft area and either de-clutch or shut off the engine and be
carried by the "suction effect" of wind coming back around the end of the
trailer.
I have no idea if it's true. And certainly wouldn't try it... :-)
My own empirical evidence with my '79 Chevy C-10 suggests that you have to be
within about one to two vehicle lengths to get any benefit, and obviously
the closer the better. However, more than two vehicle lengths is into my own
danger range so I don't stay this close unless I absolutely have to. I'm
usually not that desperate for fuel economy, and it doesn't make enough
difference (less than 0.5 MPG) to justify the increase in danger unless I'm
going into a headwind of more than 30 MPH, at which point the truck is going
far slower than I care to, and thus whatever benefit is lost completely.
I understand from observation that the effective distance for
tractor-trailers is on the order of a safe distance (3-4 vehicle lengths),
but then the point of viability is much lower for semi's than 4-wheelers (0.1
- 0.2 MPG).
Note for comparison that Nascar drivers who use this tactic in races usually
wind up being less than two feet from the car in front of them.
For what it's worth, when done correctly, drafting benefits ALL vehicles
invoved. That is, while the following vehicle(s) have air resistance greatly
reduced from the front, the leading vehicle(s) have "vacuum drag" reduced
greatly from the rear. Thus BOTH vehicles get the increase in fuel economy.
-blaine
The Zen Method of Big Rig: Grasshopper, truck will shift itself if you are
one with it. - Bill Keith (Cruising the Info-Bahn in a Mack tanker truck :-)
DoD #7192 KZ750B Frankenbike Weightlifting is LIFE - The rest is details.
http://acs.tamu.edu/~bnh5940/home.htm
Subject: Re: Help deciding college major in engineering
From: bnh5940@acs.tamu.edu (Blaine Hufnagle)
Date: Sat, 11 Jan 97 15:05:43 GMT
In article <32D6EBBA.1AF7@den.mmc.com>,
"David E. Pearce Jr." wrote:
>Major Aerospace corps require Engineering degree to be an engineer. You
>can only be a designer or drafter if you have the E.T.
Not exactly. Look at the accredidation of the ET program. Some, like ours
here at TAMU, have a 4-year ABET-accredidation, and graduates can take the
EIT exam. Many of our instructors make sure we have an understanding of
what's on the EIT, assuming we all want to take it.
>The E.T appears to me to be oriented as you say toward lab work. Only it
>is lab support work. You would be running materials tests and all other
>kinds of tests at the direction of an engineer. If you had the M.E.
>degree, you would be telling the E.T. degree person what to do.
This is applicable if the ET degree is an associates degree, and one of the
reasons I personally get incensed when people think I'm a lab-tech.
Ours is apparently one of the few ET programs that are EIT capable. Our
program was explained to me as "TAMU's Mechanical Engineering degree from 25
years ago." That is to say that the degree focuses much more on practical
application of current engineering knowledge, and the program itself is
designed to offer much more hands-on classes and opportunities to "get your
hands dirty." Looking at the class catalogs for ME and MET here, you can see
that the MET program offers classes covering hands-on, get-dirty topics
almost two years before the ME program does. Many of our theory classes deal
with learning the applicable theory and how it relates to real-life processes
and applications, instead of seeminly more esoteric "example cases," or
research instances. Additionally, (to brag a bit,) our MET program actually
has Mechanical Vibrations as a curriculum REQUIREMENT where the ME program
has it as a technical elective (which means we have not one but TWO applied
differential equations classes).
The basic reasoning behind the entire program, though, is based in the
opinion that in the last twenty years or so, the "true engineers" (*GROWL* I
am TOO a real engineer!!!) have gotten so far away from the nuts, bolts, and
real workings of production that a large and dangerous communication gap has
opened up between the engineers and the production floor. In other words,
the engineers have forgotten (or have never learned) how things really work
when it comes to actually building a new design or troubleshooting a
production problem, while the production floor has never learned how to make
improvements or new products without the help of the Engineering Department.
Our program (at least) is designed to put someone in to fill that (rapidly)
widening gap to act as "translator;" that is, someone who is familiar with
most engineering principles and theory and their application, while still
retaining knowledge of production processes, management skills, and other
tasks required of actually getting a product out the door.
Our biggest problem right now is one of image. I was in the TAMU career
center last semster doing some research, and all the jobs in the "ET" folder
were for lab techs with a 2-year associates degree. I was NOT a happy
camper. We are NOT lab-techs; we're fully certifiable as PE's in Texas (the
last time I checked) and as such can do the same jobs that "real engineers"
do. But the "technology" on the end of the "engineering" usually makes
people think that we're just glorified lab rats... The flip side is that
major employers, such as Boeing and Chicago Bridge and Iron, hire our
graduates for the "engineering," not the "technology."
The Zen Method of Big Rig: Grasshopper, truck will shift itself if you are
one with it. - Bill Keith (Cruising the Info-Bahn in a Mack tanker truck :-)
DoD #7192 KZ750B Frankenbike Weightlifting is LIFE - The rest is details.
http://acs.tamu.edu/~bnh5940/home.htm
Subject: Re: Spring model
From: leebrown@jagunet.com (Lee E. Brown)
Date: Sat, 11 Jan 1997 18:18:38 GMT
Robert wrote:
>Does anyone have the approximation (or even the actual governing
>equations) for the spring constant of a piece of surgical tubing. You
>know FORCE=k*x or as appropriate. The tubing is latex with outside
>diameter of .3 inches and inside diameter of .2 inches. The tubing will
>probably stretch 6 inches starting out at 6 inches long. Thanks in
>advance - Robert Gilster
Here's a suggestion:
1- TURN OFF the God-Damned computer. LEAVE IT OFF until you
complete Step 3.
2- Get a PIECE of the TUBING, some assorted WEIGHTS, and a
RULER.
3- Derive a characteristic equation using what you (hopefully)
learned IN FRESHMAN PHYSICS.
I'm sorry to be so nasty about it, but I am becoming sickened by
an alarming trend that I see in my profession: a reticence to
perform an actual, physical experiment in order to get actual
answers to engineering problems.
We tend to rely on analysis >way< too much, especially overblown
ones. In the above experiment, it >really< doesn't mater whether
you've accounted for every last bit of visco-elastic theory in
your model; you've characterized the behavior of the tubing with
respect to applied load, which is >all you really care about<.
Yeeesssshhh!
-- Best Regards, --
Lee E. Brown
Subject: Getting flat plastic sheets?
From: vbv@giskard.cwru.edu ("Virgilio 'Dean' B. Velasco Jr.")
Date: 11 Jan 1997 20:28:38 GMT
I need to find some flat plastic sheets, preferably
some that are fairly rigid. I have some extruded Delrin
and Teflon, but they have too much bend in them. As
evidenced by a previous posting in sci.polymers, I'm
trying to anneal the Delrin sheets; however, I would
like to avoid this if at all possible.
Can anyone recommend a source of sheets that are
reasonably flat (preferably within about +/1 mm or so)?
--
Virgilio "Dean" Velasco Jr, Department of Electrical Eng'g and Applied Physics
graduate student slave, roboticist-in-training and Q wannabe
http://dora.eeap.cwru.edu/vbv/vbv.html | Remember: Wise men still seek Christ.
"And I shall shed my light over dark evil, for darkness cannot stand the light."
Subject: Re: FEA NEWSGROUP
From: narayas@eng.clemson.edu (Steeler)
Date: 11 Jan 1997 19:34:25 GMT
From article <32d757c9.49317657@news.demon.co.uk>, by Chris@cprsys1.demon.co.uk (Chris Rogers):
> On 9 Jan 1997 23:23:44 GMT, samurai929@aol.com (Samurai929) wrote:
>
>>Everyone now and then, there are some questions about recommendations for
>>FEA software or someone wanting to know how to model a problem using some
>>particular FEA software. I wonder if there is any interest here in forming
>>a newsgroup dedicated to FEA-related issues. Any takers?
>
> Watch this space, a newsgroup Request for Discussion is close to being
> issued.
> --
> ==+==+==+==+==+==+=[ http://www.cprsys1.demon.co.uk ]+==+==+==+==+==+==+==
D
D
D
D
D
D
D
If there ever is a CFV for this group, pls. do include the post in
sci.materials and aci.engr.metallurgy. I have seen some interest
in these groups too.
n.
narayan sankaran
narayas@eng.clemson.edu
Subject: Re: Affordable Route to Quality
From: "Guy C. Reynolds"
Date: Sat, 11 Jan 1997 20:15:20 +0000
In article <852771252snz@transcontech.co.uk>, Paul E. Bennett wrote:
--- SNIP ---
>Yes, paper based systems are good to begin with and probably will suit
>most companies for quite a while. However, there does come a time when
>you will need to consider automating or computer assisting some or all
>of the QA and/or CM tasks. When this time is looming (as it is for my
>company within the next 12 to 18 months) then you need to begin planning
>early enough to manage it's sensible introduction. Consider the task as a
>project in it's own right. We will still maintain some sort of hard-copy
>record of all the paper (albeit computer printed instead of hand scrawled)
>associated with QA and CM systems.
--- SNIP ---
I whole heartedly agree. I have come across a number of computer based
Quality Systems, some good and some bad.
On one occassion I was proudly shown a company's computer based system
by the company's quality representative. However when we went out on the
shopfloor, I noted and commented on the fact that there were no
terminals on the shop. 'Oh, only senior managers have access to the
system.' When I asked how production staff got access, I was told that
they had to ask their manager to access it for them, because the MD
whould no pay to have terminals put out on the shopfloor.
On another occasion, I visited a company to do an audit and was
presented with a box of floppies and informed that this was their
system, and unfortunately I could not see it in action because they had
been burgled.
There are always parts of a system that I end up computerising such as
the documentation system, which is after all just a database function.
Also worth computerising is data analysis as spreadsheets once setup are
easily duplicated and data entered.
I've tried a number of Audit control systems, but found most require
more work than a paper based system. Since they never allow enough room
for a decent audit report, one inevitably ends up writing the report on
paper and then copying a summary onto the computer.
----------------------------------------------------------------
Guy C. Reynolds LicIQA porterhouse@graviles.demon.co.uk
Porterhouse Associates Ltd. Tel: +44 (0)1462 490564
82 Page Close, Baldock, Fax: +44 (0)1462 490564
Hertfordshire, SG7 6PU, UK.
Subject: Re: MORE changes to the sci.engr List of WWW Sources
From: "John Cheung, PhD"
Date: 11 Jan 1997 23:31:38 GMT
That is a very impressive list of engineering web sites, Ron. You've done
a good service to the engineering community world wide. Well done.
John Cheung, PhD, Singapore
RonGraham1 wrote in article
<19970109203300.PAA17936@ladder01.news.aol.com>...
> Here are even MORE changes to the List of WWW Sources.
> It's now located at
>
> http://members.aol.com/RonGraham1/www.html
>
> It includes brief essays on Web Design and Alien Mutant Spam.
>
( an impressive long list deleted for this purpose)
> Dr. Ron Graham
> Project Engineer for Robotics, GreyPilgrim LLC, Washington DC
> founder of Usenet newsgroup sci.engr and editor of its FAQs
>
Subject: Re: piping stress analysis
From: "John Cheung, PhD"
Date: 11 Jan 1997 23:49:34 GMT
CunLin,
You may like to click into Website of the American Society of Mechanical
Engineers (ASME), in which there is a Discussion Forum on "Pressure Vessels
and Piping". There you can ask questions and take part in discussions
with piping engineers, as well as pressure vessel engineers, from all over
the world.
The address of the ASME Website (also called ASMENET) is
http://asme.web.aol.com/index.html
The address of the Discussion Forum in ASMENET is
http://www.asme.org/bboard/
Let me know if you have difficulty.
John Cheung, PhD
Past Chairman, ASME Singapore Chapter
c/o School of Mech & Prod Engineering, Nanyang Technological Univ,
Singapore
email: cheungj@asme.org
Zhu CunLin wrote in article
<5b7i75$48u@nuscc.nus.sg>...
> I am a piping stress engineer with about 4 year experience. ..........
>
> I like to meet some friends who are piping stress engineer. We may
discuss
> problems and communcate , and improve our ability, increase experience.
>
> Any kind discussion is wecome!
Subject: Re: WTB: Personal FORTRAN 77 compiler (DOS)
From: butler@apollo.hp.com (Tim Butler)
Date: Sun, 12 Jan 1997 00:32:53 GMT
George Jefferson writes:
...
> : A lot of the old, bad stuff has
> :been stripped out of Elf90, so it probably won't run F77 stuff.
...
That is true. ELF90 will not compile legacy f77 code, but ELF90 is
NOT an f90 compiler. It compiles only a subset of the full F90
language. Oversimplifying some, it leaves out all of the bad or
archaic features of f77.
> Is this true? I find it hard to believe that F90 isn't completely
> backwards compatable with standard F77 as well as most
> common extensions. If I cant use my old code I might as well
> switch to C.
F90 encompasses all of the f77 standard. However, you may find that
most f90 compilers are stricter than you'd like, but this varies
greatly between implementations.
--
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Tim Butler Massachusetts Language Lab - Hewlett Packard
e-mail: butler@apollo.hp.com
Subject: Re: Finding Citation lists...
From: wpenrose@interaccess.com (William R. Penrose)
Date: Sat, 11 Jan 1997 19:36:19
In article "Arthur E. Sowers" writes:
>Almost every library worth its salt will have ISI's "Science Citation
>Index", and its in the reference section of your campus library, and even
>some large decent public libraries will have it. It comes out yearly.
Rooting through the paper edition is tough work, but it is available and
searchable through library search specialists that have an account with the
Institute for Scientific Information. We pay the one we use about $60 and
hour plus a printing charge. A search for a single author's name (1st or
other author) costs about $15 since it is a very simple search.
SCI is also available on CD ROM and some university and national
laboratory libraries have it. This can be searched painlessly if you have
access, but you generally still need a search specialist.
Bill
********************************************************
Bill Penrose, President, Custom Sensor Solutions, Inc.
526 West Franklin Avenue, Naperville, IL 60540
630-548-3548, fax: 630-369-9618
email wpenrose@interaccess.com
********************************************************
Subject: Re: hydraulic testing machine
From: imbe@primenet.com (Smith A. Cat)
Date: 11 Jan 1997 18:14:02 -0700
On Sun, 05 Jan 1997 17:32:00 -0800, Erin Nichols
wrote:
>Hello,
>I'm not exactly sure if I'm in the right place for this...
>
>I have a bit of a science paper to do (very short, only a couple pages),
>and it's on a laboratory instrument, in my case, a hydraulic testing
>machine. I couldn't find a word written about the thing in several
>local libraries, and the internet hasn't really been living up to its
>reputation. I just need to know what the heck a hydraulic testing
>machine is used for (generally, and specifically in materials testing),
simply, a hydraulic testing machine, as opposed to a mechanical
testing machine, uses hydraulic fluid to drive a piston and apply load
to a specimen. a universal servohydraulic test frame can be used for
static tension or compression testing, or for fatigue testing (cyclic
testing). hydraulic test frames use a servovalve to switch the
flowing fluid to the top or bottom of a double-acting piston and
thereby generate controlled motion. the feedback loop can be set up
so that a displacement, load, or the output from a strain device
controls the machine. the particular advantage to the sevohydraulic
test frame vs. the mechanical types is that the stroke distance and
speed of the machine can be varied over a very wide range without
having to do something like changing gears.
>the "theory behind the instrument,"
not much theory particular to the hydraulic test frame vs. other
hydraulic systems, just that a relatively incompressible fluid can be
used to transmit force smoothly and without the danger of rapid
expansion associated with, say, pneumatic force generation.
>and things like that *someone* must
>be able to answer pretty easily...
yeah, pretty easy. don't know what was wrong with those dweebs up
there who didn't do squat.
>
>Thanks,
>Erin Nichols
>
>--
and feel free to ask a more specific follow-up question.
Subject: Re: hydraulic testing machine
From: Jim Buch
Date: Sat, 11 Jan 1997 18:54:38 -0800
Smith A. Cat wrote:
>
> On Sun, 05 Jan 1997 17:32:00 -0800, Erin Nichols
> wrote:
>
> >Hello,
> >I'm not exactly sure if I'm in the right place for this...
> >
> >I have a bit of a science paper to do (very short, only a couple pages),
> >and it's on a laboratory instrument, in my case, a hydraulic testing
> >machine. I couldn't find a word written about the thing in several
> >local libraries,________________________________________________________________
and the internet hasn't really been living up to its
> >reputation.
_____________________________________________________________
The reputation is intact. I used webcrawler to search for hydraulic
testing maching and got about 20,000 hits. The third from the top of the
list was SATEC and on the first mouse click was a listing for hydraulic
testing machines.
The reputation for young students to get others to do their work for them
by posting on the internet is upheld and verified in spades.
The reputation of the internet for having people who go out of their way
to be helpful (even when undeserved) is also upheld.
