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On Thu, 14 Nov 1996 14:38:55 -0800, Tom_AustinReturn to Topwrote: >Maybe it's a generational/geographical thing. I'm 35, and in all my >time in the workplaces, and all the places I've worked, Drafter and >Designer are the standard terms, even by the Old Guard guys, who are >traditionally sexist in every other way. Do you see what I mean by the baggage of our perceptions? Here we have the perception being put forward that "the Old Guard guys, who are traditionally sexist in every other way". I don't believe there is any malice involved, just that that is the perception you have. As you can see, this colours the way you see things. In the same way, those who see the three letters M, A and N used in sequence feel offended by it because they have the perception that its use somehow demeans females. Even of the letters were C, A and T, or D, O and G, a similar situation would result. Similarly there are people equally offended when the letters MAN are replaced by PERSON or something else, or the work changed entirely. We need to understand that the word is not the problem, it is simply a convenient hook to hang your coat on. When we understand this, maybe we will start to resolve things. Regards, Ian A. White, CPEng waiwhite@zip.com.au WAI Engineering Sydney 2000 Australia
I am looking for a consultant to help develop a "steam screen" for the projection of motion pictures outdoors at Lincoln Center. If anyone knows a practical, flexible, ingenious, engineer who could come up with a design for such a device, please e-mail me with a suggestion. The resulting "screen" should be 20 feet high and should be projected with enough force to withstand wind and maintain its shape up to 20 feet. Thank you, John Goberman Producer, LIVE FROM LINCOLN CENTER ----------------------------------------------------------------------- This article was posted to Usenet via the Posting Service at Deja News: http://www.dejanews.com/ [Search, Post, and Read Usenet News]Return to Top
Harris Johnson wrote: >> > A few observations: There are very qualified engineers who are not > PE's. In fact I have even known a couple who were not college > graduates, but for whom I hold the highest respect. > > There are some PE's who frankly are just not someone I would trust to do > any work for me. What I have observed is that the probability of > someone being highly qualified, capable, and ethical seems to increase > among PE's Is this self selection, concern for the license, or some > other factor? I do not know. > > Very well put. What you've described is true most likely the world over. I am interested in this discussion because things seem to be quite different down there. In Canada, only after acquireing a degree in engineering can you join the Society of Professional Engineers and then, only after you have had your career reviewed every six months for four years can you take the test and call yourself a P.eng (Our eq to PE I guess). It is a very serious punishable offence to call yourself a P.eng when you are not one. -- **************************************************** * Doug Krokosz * Mechanical Engineering * University of Manitoba * umkroko0@cc.umanitoba.ca http://home.cc.umanitoba.ca/~umkroko0/Return to Top
Job Title: Test Engineer Location: Panama City, FL Direct Ref: BA2769 B.S. in Mechanical, Civil, or Marine Engineering. Knowledge of industry standard test procedures. Proficiency in designing experiments for qualifying flexible pipe materials and test equipment. This will be for conducting bench and full scale prototype and qualification testing. Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
Job Title: Product Engineer Location: Newport News, VA Direct Ref: SH42 BS in mechanical engineering and 0-4 years of experience with emphasis on assembly support, molding and metal stamping. Experience with CAD systems. Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
Job Title: Manufacturing Engineer #651 Location: Newport News, VA Direct Ref: SH43 BS in engineering (mechanical preferred) and 4-8 years of experience, preferably in design and manufacturing environment. Experience with CAD systems and PLCs. Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
Job Title: Mechanical Designer Location: Mebane, NC Contract Ref: NW10059 Layout and design of sheetmetal parts and bus bars using CALMA and (Computervision) CADDS5 . Wil design powerpanel and switchboard mechanical components for equipment assembly. Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
I was assistant city engineer of a small midwestern town awhile back...I'll never forget a conversation I had with the (male) personnel director one time. I told him there was a better expression than "workMAN's comp"--plenty of people who worked in the city weren't men. He was absolutely bewildered--"worker's comp" had never occurred to him. Moral of story--people will sometimes go for the sexist title even when it's a more awkward locution (like "draftsman" instead of "drafter"). Carolyn Dougherty carolyn@accesscom.net "At last," cried Emerson. "Free from forges, farms and factories. How I long to write my masterpiece!" "No," said Thoreau, "let's go drinking." _Dreams_Return to Top
> the device is _i_n_s_u_l_a_t_e_d_ ! Sure the key is made of metal, Reading the thread I could not believe that no one until you had actually answered the question!!!!!! Garry Wilson garryw-loc@nmit.vic.edu.auReturn to Top
Job Title: Quality Engineer #508 Location: Newport News, VA Direct Ref: NW10012 BS degree in mechanical, electrical, or industrial engineering required plus 4-8 years in technical writing, test design and planning related to product quality assurance. CQE preferred (Certified Quality Engineer) Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
Is there somebody out there working on creep-recovery tests using a DMA?Return to Top
Ed Lavoie wrote: > > M.E. Moore wrote: > > > What will be the safety issues when electric cars hit the streets? > > Would there be electric shock hazards for rescue personnel when they're > > digging people out of a wrecked electric car? > > > > -- > > M.E. Moore > > Los Alamos, NM > > The dangers lurking inside yet-to-be-released electric cars will not > come from electricity but from the flywheel. Yes, the flywheel. Latest > designs for electric cars use a massive flywheel to store energy. What > do you think happens to those flywheels after a crash? Well, I can see > it now... "Thousands of attorneys file suit after suffering injuries > while chasing flywheels looking for potential clients!" It could > happen. We don't go cutting into the gas tank during extrication of a victim from an auto accident. I see no reason to cut the flywheel, battery, or power leads, either. The "Jaws" are used to remove the doors and roof, not to cut the car to ribbons... Birken T. Vogt - KE6DLTReturn to Top
(Peter Skelton) writes: > I'm married to the drafting supervisor at a local plant. She flatly prefers > drafter or draftsperson but wouldn't make an issue of it, after all there > are real problems to be dealt with. > > As I want to stay married another twenty years, I'll be polite. > > Most sexism is lazyness, insensitivity or stupidity. There is a slight > possibility that your drafter considers you incorrigible in that way and > dosen't feel you're worth the emotional energy and career risk involved. But, but .... but, the word "draftsman" is just a title, meaning *one* who drafts. There is not gender associated with it at all. If one were to train a dog or cat to draft, it's still an appropriate title. Do not underestimate your abilities. That is your boss's job. It is your job to find ways around your boss's roadblocks. _______________________________________________________________ Glen Appleby glena@bbs.cruzio.com http://www2.cruzio.com/~glena/Return to Top
Job Title: Product Engineer #654 Location: Newport News, VA Direct Ref: SH45 BS in mechanical engineering and 4-6 years of related experience, preferably in a manufacturing environment. Experience with CAD systems, molding or metal stamping. Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
Job Title: Senior Product Engineer #482 Location: Newport News, VA Direct Ref: NW10011 BS in mechanical engineering and 10-15 years experience with plastic injection molding operations, tooling processes, metal stamping operations and a variety of plastic materials used in office product component parts. Please indicate specific NEWSGROUP where you saw this ad! Submit resumes to: Aide, Inc. P. O. Box 6226 Greenville, SC 29606 Voice: 1-800-968-8971 Fax: 1-864-322-1040/1-864-244-8458 email: recruit@aide.com Visit our Home Page: http://www.aide.com/~aide/ xaidexReturn to Top
I need to identify the dynamic properties of several different materials (including different types of foam and rubber). One test of importance will involve measurement of the energy absorption of the test item when stricken with a metal ball (mass approximately 0.25 kg, speed 5 m/sec). Questions: 1. Is there a standard device for performing tests of this kind? 2. Is there an ANSI, ASTM or similar specification for this type of tests? 3. Assuming the answer to (1) and (2) is "no", what types of tests are performed on motorcycle helmets? Can anyone point me to literature regarding those tests and any relevant research papers? I will appreciate all responses to any of the above questions. -- George Tziviskos gvc@themall.net ______________________________________________________ Your glasses will always be in the last place you look or in the first place you sit.Return to Top
In articleReturn to Top, baker.204@pop.service.ohio-state.edu (chris baker) wrote: >I've looked at two modes of failure and, am not sure if I'm correct. > >mode 1 >modeled top part of "L" as a cantilever beam and looked at stress at >attachment point. Correct, except that the maximum shear occurs where the bending stress is zero and vice versa, so there's no need to combine them. Presumably you found that the shearing stress was very small so it didn't matter. >mode 2 >looked at base of bracket and looked at stresses there. >(Sigma1 = My/I) + (Sigma2 = P/A) and then applied MSST. > >Is this correct? What other modes of failure should I look at. The fastener (weld or bolt) checking for both shear and prying action. And set the bolt pre-load so that the bracket won't lose contact with the vertical surface. You basically did the right thing. You didn't mention what you took for an allowable stress or whether fatigue was a consideration. It's always important to ask. The question to ask is what Code or rules apply to the product. If none are stated, you need to dig around a little and find out what standards of practice apply to the situation. Christopher Wright P.E. |"They couldn't hit an elephant from chrisw@skypoint.com | this distance" (last words of Gen. ___________________________| John Sedgwick, Spotsylvania 1864) http://www.skypoint.com/subscribers/chrisw
In <328800EB.A45@multiverse.com> "Lawrence S. Galt"Return to Topwrites: >McInnis wrote: >> >> Actually, I've heard that you can electrocute yourself with 12 Volts, >> but it's real hard to accomplish. >> -- >> Mickey McInnis - mcinnis@austin.ibm.com >> >I current through the chest of 50 milliamps or more is increadably >uncomfortable and generally regarded as potentially lethal for a healthy >adult. With 12 volts that would reguire a body resistance of 240 Ohms I think it is of the order of mA (through the heart) required to send you heart into ventricular fibrillation (= death unless resuscitated). The skin is your protection; below this it's all body electrolyte (like a bath-tub full of salt-water) with greatly reduced resistance. Another point to bear in mind is the 'let go current'. This is a certain threshold current beyond which you will not be able to release your grip on what you are holding. The reason is that the current has literally paralysed the muscle action, so there's nowt you can do. >or less. To achieve this low a resistance would probably require the >leads to be inserted in open wounds on each side. Possible but >unlikely. >Of course some one who is ill or of small stature could be killed with >less. That is why electrical circuits in hospitals are tightly >regulated to minimize leakage currents. >-- >Larry Galt - - - - A Right Wing South-Paw - - - - lgalt@multiverse.com >When the world thinks right & works left, all thats left will be right! > UNTIL THEN - KEEP YOUR POWDER DRY!
In article <84@da486f.win.net>, ceely@da486f.win.net (Charles E. Ely) wrote: >I have to predict the resonant frequency of a large passive, >unpowered vibration indicator >Can somebody recommend a handbook that would make a good addition Try Harris and Crede, 'Shock and Vibration Handbook' Christopher Wright P.E. |"They couldn't hit an elephant from chrisw@skypoint.com | this distance" (last words of Gen. ___________________________| John Sedgwick, Spotsylvania 1864) http://www.skypoint.com/subscribers/chriswReturn to Top
try DWA in Chattsworth, CAReturn to Top
I have to machine a 316L SS plate 1" thick. Overall dimensions of the plate are 42" x 62". The following tolerences have to be held; Maintain flatness on all surfaces within 0.010 FIM Maintain parallelism on all surfaces within 0.005 FIM 125 finish on all surfaces. Please reply by email to jtmrep@nlenx.comReturn to Top
I try to construct a deflection model of beam, because the bottom of the simply-supported beam only has the positive deflection. How can I treat it? Please help me! Email: tsai@mail.ifw.uni-hannover.deReturn to Top
(J C George) writes: >There is a bit of dispute over which is more dangerous, AC or DC. The >American electric chairs use DC as Edison (?) who developed AC was asked >which was more deadly. He said DC and this has been used in American prisons >ever since. My recollection is that the most effective heart-stopper is around 50 Hz, i.e. as in domestic supplies. RF is relatively safe (it is used for surgery). Some of the original research for this was done on dogs (beagles) by repeatedly stopping and restarting their hearts. >Jon "Boyracer" George >*Bzzt* "Ah! SH*T!" - me shorting out a positive earth car.Return to Top
altavoz (altavoz@worldnet.att.net) wrote: : altavoz: The problem is GOVT SCHOOLS ! If all schools were private : there'd be competetion to satisfy industry , not some group of regents. What nonsense. There really isn't any difference between a board of regents and a board of whatever private schools have to do the same job. The standards are set by an accreditation board, anyway, since regenents or governers aren't normally practicing engineers, anyway. And if VPI had been out to satisfy industry when I graduated, everything I learned would have been obsolete by 1970. Sounds like altavoz has been tripping through the Newt Gingrich dream world. Christopher Wright P.E. |"They couldn't hit an elephant from chrisw@skypoint.com | this distance" (last words of Gen. ___________________________| John Sedgwick, Spotsylvania 1864) http://www.skypoint.com/subscribers/chriswReturn to Top
This isn't a chain letter? Then apparently you have never read one! I always hated to get them from my good friends; not to mention someone I have never heard from!Return to Top
In article <5688ta$280u@ausnews.austin.ibm.com>, mcinnis@austin.ibm.com (McInnis) wrote: > >In article <55iomi$dc8$4@mhadf.production.compuserve.com>, DC <75277.3335@CompuServe.COM> writes: >> Why doesn't a person electrocute himself when he turns on the >> ignition in a car, since he is holding a metal key contacting metal >> leads (to the battery) in the steering column, and moreover his body >> is touching the car's ground (its frame)? >> Thanks for clarifying this. >> >> -- >> From 75277.3335 at CompuServe > >Well, I haven't disassembled one lately, but I'd bet that the lock >is electrically isolated from the contacts for the ignition. i.e. >there's insulating material between the lock and the hot wire. > >Actually, I've heard that you can electrocute yourself with 12 Volts, >but it's real hard to accomplish. i knocked myself and a friend to kingdom come, when we were kids. we were playing with a 12 volt jcb battery, melting wire, and stuff. We each had one end of the wire, and were squatting next to each other. I lost my balence a bit, and put one hand on his shoulder. next thing we know, we were lying on the flor, about 3 feet back from the battery, against the wall.. Just goes to show, respect a battery. it might only be 12 volts, but the big lead acids can put out 300+ amps, easily enough to kill. all opinions are home grown...Return to Top
Dug wrote: > > Harris Johnson wrote: > >...There are very qualified engineers who are not > > PE's. In fact I have even known a couple who were not college > > graduates, ... As one of the above cited "mustangs," I submit that there is a qualita- tive difference between one who has the job title of Whatever Engineer, and has the title on his **COMPANY-PROVIDED** business cards (and, when appropriate, distributes those cards), and one who holds himself out as a Professional Engineer in private practice. Also, in my personal bali- wick (I'm a software jock.), there is a great deal of blather going on about "Software Engineering." Where are the EIT/PE exams/standards for Professional Software Engineers? If there are none, can I, upon my re- tirement from the corporate wars, legitamately, or even lawfully, set up a practice as a Software Engineer? (Sigh!) I guess I'll just change my name to Dogbert, and set up as a consultant! 10/Q, JackReturn to Top
A mega site for industries! http://www.industryone.net ThanksReturn to Top
It seems the question was what completes the curcuit. The ground(dirt) completes the curcuit. At every properly wired breaker box and pole transformer, the neutral and ground are connected and connected to an earth groung. Look at the pole outside your home. If it has a transformer, a groung wire will run down the pole.... into the earth. In the event or an electrical short, current will be diverted into the earth and complete a circuit to the transformer ground. The ground wir and neutral are connected there. JohnReturn to Top
Jack these organizations wanting to eliminate industy exemption don't realize what effect it will have on people like yourself. I might agree with more regulation if they have fair ideas on how to handle the unlicensed engineers now working in the field. There are many more non-licensed engineers in the work force than are licensed. Cliff W.Return to Top
I've seen it stated, especially relating to LBMs, that smaller diameter wires or rods actually have increased strength characteristics. Is this strength per unit mass, per cross section or what? Is this compressive, tensile, shear... all of the above? Can anyone quantify this and also explain the mechanism behind it? Also, does anyone have a formula, or rule of thumb, relating the strength of a 'pipe' of metal compared with a solid rod of the same outer diameter or same mass? Thanks for the info. - GaryReturn to Top
I'm looking for someone with machine tool design experience, for a position in New Hampshire. If you have experience around machine tools and are even slightly interested in hearing about the position, please email. Thanks. Kevin Wasson Aesop, Inc. klwasson@aol.comReturn to Top
You just go to Window-->Netscape News-->File-->Add Newsgroup after inputing the newsgroup name and returning, click in the name list. Kejun Zeng -- AG Elektronische Materialien Tel: +49-5323-72-2131 TU Clausthal Fax: +49-5323-72-3120 Robert-Koch-Str. 42 e-mail: kejun.zeng@tu-clausthal.de D-38678 Clausthal-Zellerfeld GermanyReturn to Top
> I've sat here for quite a while staring at your question. I wish I could > answer it. The situation reminds me of something Tony Rizzo said here a > couple years ago. Paraphrasing (very loosely, probably), learning cannot > begin until one admits the possibility that one doesn't already have all the > answers. A tactic that might work in a few situations is to challenge the > other person to put his money behind his answer. I don't see how that would > fit in your predicament. I think a lot of analysts would seek verification > by prototype before betting their own money on their predictions. > I have a quote on my desk that says "IT IS IMPOSSIBLE TO BEGIN TO LEARN THAT WHICH ONE THINKS ONE ALREADY KNOWS" - EPICTETUS . That must be, what, two or three thousand years ago? That quote to me says that no matter how much you think you know, you can always learn more. If, and only if, you let your professional ego allow you to learn will you learn. Question everything. My $0.02 -- MEFYE/@mail.delcoelect.com Senior Development Engineer Appearance Technology Development Delco Electronics Corporation Audio and Communication Systems Global Product Unit R231 Kokomo, Indiana I don't speak for Delco. As the cows in Indiana say: Carpe trifoleum > Seize the hay <Return to Top
REQUEST FOR COLLABORATION IN THE DEVELOPMENT OF INDUSTRIAL RESEARCH. We make research and actually we are completly financed by a committent. For new researches we would like to have the collaboration of Industrial Partners, interested in introducing advanced items in their market. Every item is patented or can be patented. In Europe there is the possibility for Partners to have E.C.C. founds to whom we are not interested in any way. We are looking for financial Partners and for laboratories too in order to realize practically and industrially our discoveries. These are some of the fields we are working in : 1 - INDUSTRIAL INSULATION The subtitution of the actual insulating materials ( plastic foams, rock wool ) generally known to have long term defects and ecological problems with new insulating elements e.g. special foamed and not foamed and dense glass or ceramic elements, ecologically perfect and lasting 20 - 50 year and recycling possibility. 2 - METAL PRODUCTION We have developed a new metal-organic ecological route to obtain metals; e.g. magnesium, titanium, zirconium, silicon, aluminium, so saving energy. 3 - High temperature service development of a stable SELF EXTINGUISHING epoxy resin with electrical high insulation power Epoxy resins and epoxy foams for long term usage at 200° C / 250° C for continuos service. 4 - RAPID ULTRAVIOLET PRODUCTION OF SPECIAL URETHANE - ACRILATE Abrasion resistant, excellent flexibility and stability for films, flooring protection, car protection, paper protection, metal and mortar protection. Unlimited applications for item protection. 5 - NEW RESINS High temperature, oil, grease, water, solvent resistant till 300° C. We are engaged in many types of researches, from plastic to ceramic, to ceramic superconductors etc. If You think to have the same interest in our researches, or if You have specific items to subject us along with our type of research, or if You are interested in financing, receiving an eventual license or if You are interested in a local collaboration with us, please send an E-MAIL and we would be glad to answer You scienza@pianeta.itReturn to Top
INTERNET Some people prefear to go on thinking that the Einstein’s relativity theory is right , thinking that matter cannot reach and substain light velocity, because in this case matter would have an infinitive mass , and it would be necessary to transfer to it an infinitive quantity of energy to reach light velocity. At the same time the physics substain that at elemental material level the time does not exist and that in normal conditions it is not possible to travel in the time. As opposite to what mentioned before, the writer, after 20 years of research out of the pubblic ufficial circuit of the physical research, can prove that things are different. Some examples of his theories follows: -The conception of time and space given by Einstein Relativity is completly inconsistent applied to the case of light velocity of the matter and the time is translated by some physical, heavy consistent material particles but normally invisible. In many cases the theories substained by the physics are uncomplete or inadeguated to describe the reality, but because of their lack to give an explanation to the real phenomenons; they continue to substain that their concepts is the only truth, thing that is false in the reality. - The Writer gives some information about: 1) travels of matter at light velocity in present time, 2) the explanation of the natural composition of the elemental particles that translate the time in the matter, 3) the explanation of the forces unification, where it is explained the natural formation in the sub-elemental particles of the electricity, of the magnetism and the gravity, 4) explanation of matter at null temperature, where the quarks can be visible and free, because they are stopped in the space, expanded and enlarged 10(18 ) times or 1 billion of billions of times and they are freely visible at naked eyes for about 10 minutes and they reveal their true physical nature as physical particles. The Writer brings explanations and ascertained cases which confutate the Einstein’s relativity theory substaining that the matter can not travel at light velocity. The contrary is possible. It is given the right explanation of the whole physical world (included that the real physical structure of the space is " not "empty" , but it has a completly different structure " normally " not ascertainable "). End of December 1996 it will be ready a book , entitled "THE QUADRIDIMENTIONAL UNIVERSE", where in about 420 pages with colour photos and pictures , the writer explains these theories and many other concepts not already reached by the officials science. Shipment: per Airmail. Possible markets: All countries except for Italy , Switzerland , Japan, Cina , C.S.I. and related Countries DEPOSITED AND PROTECTED CONTENTS SINCE 1994 PLEASE REPLY FOR MORE INFOS OR TO READ FURTHER PAGES: scienza@pianeta.itReturn to Top
Hello all, I'm designing a worm drive mechanism using a steel worm. I'm considering using delrin for the worm gear instead of the more commonly used bronze. I think it may give me lower friction coefficient. Can anyone recommend a source of information on making worm gears with delrin? I need to know the materials and size correction factor for delrin (my books only have it for bronze) and the friction coefficient as a function of sliding velocity. I've got some basic delrin information from Duponts web site, but I need more detail. Regards, David NugentReturn to Top
Jon Christensen wrote: > > > On 5 Nov 1996, Brian Greer wrote: > > > > > Hi, > > > I need some advice on how to model a screw with a constant pitch > > > through the whole length. I'll be using either Microstation 95 or Autocad > > > 13. If any one has any suggestions or blocks(cells), please send over. > > > Thanks! BG bg@scs.unr.edu > > Why not create the thread cross section and then sweep this along the > helix which > would create the threads nicely. This is the way I do it. It is not very > useful except > for looks though:) > > Good luck. > > Jon Christensen > Tactical Aerospace Corp. > jon@tacaero.com i use cadkey to model perfict threads.i then use fast surf to sweep the surfaces,ready for cnc work. regards g. menzies ph molds ltdReturn to Top
I see that Cosmos/M and IDEAS has the capability to do Fatigue Analysis with FEA. I studied the data that the software takes-in to conduct a Fatigue Analysis. But I am interested in knowing what the software really does. How does it treat the cyclic load for a linear static analysis?. Does it perform an iterative static analysis for each event in a fatigue cycle and computes the alternating and mean stresses?. How much is this process different from the "classical" method of determining alternating and mean stresses using FEA considering the appropriate loads?. Is there any theory that accounts for the cumulative damage the part undergoes?. Is there a FEA formulation that can solve for the stresses due to cumulative damage?. If anyone has any information or literature in this regard, please email me. Thank you very much in advance. Venkatesh Kannan. hpeng1@ix.netcom.comReturn to Top