Subject: Re: Impact forces
From: gardnerw@gnn.com (William Gardner)
Date: Thu, 03 Oct 1996 05:26:18
In article <325310C3.D6D@nando.net> Matt Ridge wrote:
>I am in the process of desinging a shear for wire and was wondering how
>to account for momentum of the shear in my calculations. It is obvious
>that if it takes a certain of force (according to direct shear eq.) to
>cut the wire, this can be amount reduced considerably if the shear is
>moving rapidly when it contact the wire. I think it has to do with
>energy or something like that, but I am only guessing.
>
>Any help would be appreciated.
It will still take the same amount of force to cut the wire, assuming you are
not going fast enough to change the failure mode, e.g., from ductile to
brittle. The force generated by the deceleration of the shear while it is
cutting depends upon the mass of the shear and stiffness and damping
properties of the mechanism behind it (as well as the shear itself). If you
want to account for impact, you will have to look at the dynamics of the
system (F=ma+cv+kx). If the shear is can be assumed rigid, then just reduce
the applied force by the weight of the shear.
(didn't mean to make a simple calc. complicated)
-----------------------------
Will Gardner
gardnerw@gnn.com
-----------------------------
Subject: --> Looking for Moshe Alamoro, formerly with Deshen, Intl.
From: noring@netcom.com (Jon Noring)
Date: Thu, 3 Oct 1996 22:17:58 GMT
Hi,
I'm wondering if anybody here knows where I can find Dr. Moshe Alamoro. Back
in the late 80's he formed a company called Deshen, Intl., to build portable
"plants" to produce nitrate fertilizer using the Norwegian Birkeland-Eide
process. The B-E process uses an electric arc to fix the nitrogen in air. It
was used in Norway for many years ago until the currently-used Haber-Bosch
process was perfected).
Any leads would be welcome.
Thanks!
Jon Noring
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Subject: Re: Which CIVIL engineers are more in demand?
From: Yan Seiner
Date: Thu, 03 Oct 1996 14:01:17 -0400
EVERYONE needs to take management courses in today's world, just as
everyone needs to take writing or communications courses.
You cannot succeed in today's job market without at least understanding
management. You may not be any good at it, you may not want to do it,
and you may despise managers as bumbling technically incompetent morons
a la Dilbert, but - THEY DECIDE raises, who stays, who leaves, and most
importantly who gets hired in the first place.
I think the only reason I got my first job as an environmental engineer
was not because of any technical prowess - I had spent years as a
drafter and had only had one environmental course in college - but
because I could intelligently discuss the tax benefits of leasing v.
buying, and why a company should be an S-corp if it qualifies.
My point is that engineers often fail to achieve as much as they should
because they ignore the people they work with. Colleges are as much to
blame as any other institution. On most campuses, engineers are located
almost off-campus, usually in a basement or some non-descript building,
and are not required to take classes in communication, writing,
languages, literature, economics, etc. etc.
Such a person, after ten or twenty years pushing numbers on calcuators,
can't help but be Dilbert management material.
Subject: Re: Your Most Often Used References
From: Russell_Michael@hq.navsea.navy.mil (Russell)
Date: 3 Oct 1996 20:39:59 GMT
In article <324CA1C3.7E89@ucsd.edu>, ccoughran@ucsd.edu says...
>
>Paul Skoczylas wrote:
>>
>> > McMaster-Carr catalog
>>
>> At least two people have said this. What do they sell, and why is
their
>> catalogue useful?
>
>They sell almost everything that falls under the rubric of industrial
>supplies. Their catalog is almost 3000 pages.
(cut)
>Charles Coughran
>ccoughran@ucsd.edu
I agree; this is a great catalog - but how did you get one? I've tried
to replace our office's now 10 year old copy for the last 5 years -
they're always friendly on the phone and promise to send it, but nothing
ever shows up (and we're a small enough office that I'm sure it's not
getting snagged from the mailroom). You'd think a vendor would be happy
to send their catalog to a design and T&E; branch of the United States
Navy; we have, after all, been known to buy stuff from time to time....
Subject: Re: Is Mechanics of Materials misleading ?
From: Russell_Michael@hq.navsea.navy.mil (Russell)
Date: 3 Oct 1996 20:53:41 GMT
In article <01bbad19$a48b4980$279615a5@Singnet.singnet.com.sg>, stcheung@singnet.com.sg
says...
>
> I am having heated debate with a colleague in my university's mechanical
>engineering department. In planning a new Elective subject relating to
>advanced aspects of buckling, plastic collapse, as well as plates, shells,
>etc. I give the subject the established name of Advanced Mechanics of
>Materials.
> He strongly object to this title.
(cut)
My college structures text was titled "Mechanics of Materials" (Higdon, et. al.; published
by Wiley & Sons, New York) and covered in a basic way the coursework you mentioned.
FWIW
Subject: Re: Wall Venable a Faggot
From: VENABLE@cemr.wvu.edu (Wallace Venable)
Date: Thu, 3 Oct 1996 18:20:40 GMT
Some student at WVU, thinking he/she can not be traced, posted a
message with the false address
"Jphn Seeberger "
If you are offended by the post, please do not address replies to
John, as he is not the responsible party.
Clearly the timing and routing of this post cuts the list of
suspects to less than 60 students, and Mr. Seeberger, A SYSOP who is
offended at forgery of his name, already knows roughly where it originated.
Subject: SECOND INTERNATIONAL CONGRESS IN MATERIALS SCIENCE AND ENGINEERING - ROMANIA
From: Petrica Vizureanu
Date: Thu, 03 Oct 1996 09:15:56 -0700
SECOND INTERNATIONAL CONGRESS IN
MATERIALS SCIENCE AND ENGINEERING
_______________________________________________________________________________
FIRST ANNOUNCEMENT - CALL FOR PAPERS
AND PRE-REGISTRATIONS FOR EXHIBITION
_______________________________________________________________________________
ASM ROMANIAN CHAPTER AND TECHNICAL UNIVERSITY JASSY
FACULTY OF MATERIALS SCIENCE AND ENGINEERING
AT
THE TECHNICAL UNIVERSITY "GH. ASACHI" JASSY - ROMANIA
27 to 30 May 1997
THE EVENT
Organized by ASM International and the Technical University "Gh. Asachi" Jassy, this
Congress is a great international event. This joint Congress will be the occasion for
a world review of recent advanced, innovations and general trends and prospects in
the material science and engineering, amorphous, composite and unmetallical materials.
Scientific and Technical Scope of the Congress:
- Physical, chemical and metallurgical aspects of materials science and engineering.
- Ecological problems of materials engineering.
- New materials.
- New processes and equipments.
- Control in the materials science and engineering.
- Quality in the materials engineering.
- Computer software and materials information.
The Exhibition
The International Congress will include an Exhibition, at the same location, to include
the most modern systems and hardware used for materials science and engineering.
Poster sessions (including commercial posters), will be held for those not taking part
in the exhibition, to publicise their products and work.
Subject to prior arrangement, exhibitors may also give technical and commercial
presentations on their products in the same location.
Social Events
The Congress will include :
- a wellcoming ("icebreaker") reception for participants.
- the Congress dinner.
- a social programme for the accompanying persons.
- local visits.
Call for papers
Authors wishing to present a paper should provide a brief abstract (10 to 20 lines) in
English, along with the attached reply card; this will be reviewed by the Scientific
Programme Committee which will select papers. Abstract should reach to organizers
before December 15, 1996.
Publication of Proceedings
Papers included in the programme together with abstracts of papers accepted in the form
scientific and technical posters will be published in the Congress Proceedings. Camera
ready copy should reach the organisers before February 15, 1997.
Registration
Persons and compagnies wishing to take part in the Congress are invited to complete and
return the attached reply card; in due course the organizers will provide further
information on registration.
---------------------------------------------------------------------------------------
REPLY-CARD
NAME : _______________________________________Function : _______________________
Company : ______________________________________________________________________
Address : ______________________________________________________________________
______________________________________Country : ________________________________
Tel. : ________________Fax : _____________________E-Mail : _____________________
Please send me the following when available : __________________________________
Ž The Congress programme Ž Details of Congress registration
Arrangements for :
Ž The exhibition of equipment
Ž The commercial poster sessions
Ž The presentation of a commercial paper
I should like to give a paper on the following subject : _________________________
I attach an abstract for 10 to 20 lines together with the names and affiliations
of authors (to be returned by 15/12/96)
Technical University "Gh. Asachi" Jassy
Faculty of Materials Science and Engineering
Prof. Dr. Eng. ADRIAN DIMA
Bd. Mangeron, 63
IASI, 6600
ROMANIA
Tel. : 0040-32-174420/161 Fax : 0040-32-211667
E-Mail: adima@sb.tuiasi.ro E-Mail: peviz@sb.tuiasi.ro
Subject: Re: Is Mechanics of Materials misleading ?
From: bobc@bcstec.ca.boeing.com (Bob Carpenter)
Date: Thu, 3 Oct 1996 23:31:38 GMT
In article <324EE41E.50B@vt.edu>, Bill wrote:
>Seems like everyone out there is missing the point. I have no idea why
>Tony Rizzo even posted that babble on here, other than to see his name
>on his news reader. Larry, although making good points and proving that
>people in the field realize a course such as yours is good, offers no
>solution (4 times over). Here it is, plain and simple:
>
{some stuff deleted}
I have to come to Tony's defense. I didn't think it was babble,
in fact I found it enlightening. The original poster was struggling
with the problem of trying to resolve a conflict with a colleague.
Tony's logic-based method offers a structured approach that allows
you to fully understand why you have certain opinions on a subject;
and if you understand why you hold a certain position or belief it's
easier to persuade others to your side - or to see the flaws in your
thinking, making it easier to accept an alternate position.
So, Tony - what's a good book to learn more about this method?
Thanks.
--
--BobC
Bob Carpenter
Subject: friction: impossible to modelize?
From: enrique.juaristi@crpht.lu (Enrique Juaristi)
Date: Fri, 04 Oct 1996 09:00:51 +0100
After having read some (old) references, I am almost convinced that friction
is almost impossible to modelize, be it analytically or numerically.
There are a lot of factors to be taken into account and most of them are either
impossible to measure or unpredictable.In the project I am working on, the
friction between two hot rolled steel products is being studied.
I'd like to know whether someone knows of techniques, hypotheses,
experimental settings or references that could allow me to create a
realistic model.
Thanks,
--
Enrique Juaristi, mechanical engineer
Centre de Recherche Public Henri Tudor
6, rue Coudenhove-Kalergi
L-1359 Luxembourg
Phone: +352 42 59 91 244
fax: +352 43 65 23
Subject: European Patent Office (Holland) recruits ENGINEERING AND SCIENCE GRADUATES
From: elio@xs4all.nl (Elio Lo Conte)
Date: 4 Oct 1996 13:02:24 +0100
EUROPEAN PATENT OFFICE http://www.Austria.EU.net:81/epo/
We are a self-financing intergovernmental organisation which grants
patents valid throughout Europe.
We employ nearly 4000 highly qualified staff, over half of whom search
and examine patent applications.
___________________________________________________________
In the Hague (The Netherlands) for 1997 we are looking for
ENGINEERING
AND SCIENCE GRADUATES
to carry out search and examination of patent applications in the
following fields:
mechanical engineering, electromechanics. textile chemistry,
inorganic chemistry, electrochemistry, polymers, biochemistry,
molecular biology, genetic engineering, chemical engineering. general
electronics, telecommunications, optics, computer science &
technology, circuits, electrotechnics.
Candidates should meet the following requirements:
have a good university degree in one of the relevant fields. Some
years' professional experience would be an advantage
have an excellent knowledge of one of the official languages of the
European Patent Office (English, French and German) and understand the
other two
want to join an international environment at the forefront of
technology
enjoy working with PCs on a day-to-day basis
be a national of one of the Contracting States of the European
Patent Organisation (Austria, Belgium, Denmark, Finland, France,
Germany, Hellenic Republic, Ireland, Italy, Liechtenstein, Luxembourg,
Monaco, the Netherlands, Portugal, Spain, Sweden, Switzerland and the
United Kingdom).
In return, there will be permanent employment with an attractive salary
package commensurate with international employment.
Please send your CV specifying your proficiency in the required
languages to recruitment@epo.e-mail.com
or to European Patent Office
Personnel Dept.
Postbus 5818
NL-2280 HV Rijswijk
Fax (+31) (70) 3403773
(Please allow us a few weeks to deal with your application)
we plan to recruit a large number (between 80 and 100) of technical
people in 1997 in the Hague.
The same advert you can find already at our site
http://www.xs4all.nl/~elio/epo/recrexam.htm
more information about our organization can be found at
http://www.Austria.EU.net:81/epo
Thanks in advance
Elio Lo Conte