303:, the mathematical plane inside the bar that didn't change length when the bar bent. The two marks near each end of the bar which defined the meter were ruled on this surface. Thus, to first order, the distance between the marks wouldn't change due to the slight sagging of the bar under its own weight between support points. One of the bars was selected as the International Metre. The United States received National Prototype Metres No. 27 and No. 21 in 1890. When the
266:
242:
31:
297:. The bars had a cross section shaped like a modified letter X, designed by Tresca, called the "Tresca section". The Tresca section was designed to provide maximum stiffness. In addition, one surface of the central rib that joined the arms was designed to coincide with the bar's
237:
139:
He is the father of the field of plasticity, or non-recoverable deformations, which he explored in an extensive series of experiments begun in 1864. He stated one of the first criterion of material
307:
in 1893 declared the meter to be the fundamental length standard, No. 27 became the US primary national standard for all length measurements. It remained so until 1960.
503:
152:
128:
286:
316:
104:
448:
498:
403:
463:
Sessional Papers, Volume 2, Second
Session of the Third Parliament of the Dominion of Canada, Session 1875, Volume VIII
421:
327:
455:
Note on the form which it is advisable to adopt for the metres to be constructed by the
International Commission
274:
488:
373:
108:
493:
459:
Second Report of the
Commissioner of Inland Revenue of the Inspection of Weights, Measures and Gas
454:
282:
294:
94:
483:
478:
358:
8:
363:
353:
124:
254:
368:
348:
304:
383:
269:
National standard meter #27, primary US standard until 1960, with Tresca section.
378:
323:
472:
407:
343:
299:
278:
331:
265:
232:{\displaystyle \ \sigma _{tresca}=\sigma _{1}-\sigma _{3}>\sigma _{max}}
144:
143:, that now bears his name. The criterion specifies that a material would
249:
Tresca's criterion is one of two main failure criteria used today for
290:
241:
250:
140:
44:
465:(English translation of Tresca's French paper on Tresca section)
260:
30:
155:
277:
that served as the first standard of length for the
253:
materials. The second important criterion is due to
449:Henri Tresca in Technische Mechanik fĂĽr Ingenieure
231:
470:
322:Tresca's stature as an engineer was such that
123:(12 October 1814 – 21 June 1885) was a French
293:, France made 28 prototype line standards of
287:International Bureau of Weights and Measures
273:Tresca was also among the designers of the
261:Design of the International Prototype Metre
245:Comparison of Tresca and von Mises criteria
315:Tresca was made an honorary member of the
129:Conservatoire National des Arts et MĂ©tiers
29:
504:Members of the French Academy of Sciences
317:American Society of Mechanical Engineers
264:
240:
105:American Society of Mechanical Engineers
471:
134:
257:. See comparison on the image left:
13:
14:
515:
442:
404:"National Prototype Meter No. 27"
414:
396:
310:
1:
389:
285:had been signed in 1875, the
326:put his name on number 3 in
7:
499:French materials scientists
337:
10:
520:
109:French Academy of Sciences
16:French mechanical engineer
127:, and a professor at the
114:
100:
90:
83:
75:
67:
51:
37:
28:
21:
283:Convention of the Metre
270:
246:
233:
332:Eiffel tower in Paris
328:his list of 72 people
268:
244:
234:
453:Tresca, Appendix C:
359:Adiabatic shear band
153:
121:Henri Édouard Tresca
489:People from Dunkirk
364:Yield (engineering)
354:Mohr-Coulomb theory
275:prototype metre bar
125:mechanical engineer
271:
247:
229:
135:Work on plasticity
85:Engineering career
422:"Honorary Member"
255:Richard von Mises
158:
118:
117:
511:
494:French engineers
436:
435:
433:
432:
418:
412:
411:
406:. Archived from
400:
349:von Mises stress
305:Mendenhall Order
295:platinum-iridium
238:
236:
235:
230:
228:
227:
209:
208:
196:
195:
183:
182:
156:
145:flow plastically
58:
33:
19:
18:
519:
518:
514:
513:
512:
510:
509:
508:
469:
468:
457:, pp 77-93, in
445:
440:
439:
430:
428:
420:
419:
415:
402:
401:
397:
392:
384:Viscoplasticity
340:
313:
263:
217:
213:
204:
200:
191:
187:
163:
159:
154:
151:
150:
137:
63:
60:
56:
47:
42:
41:12 October 1814
24:
17:
12:
11:
5:
517:
507:
506:
501:
496:
491:
486:
481:
467:
466:
451:
444:
443:External links
441:
438:
437:
413:
410:on 2008-09-16.
394:
393:
391:
388:
387:
386:
381:
379:3-D elasticity
376:
371:
366:
361:
356:
351:
346:
339:
336:
324:Gustave Eiffel
312:
309:
262:
259:
226:
223:
220:
216:
212:
207:
203:
199:
194:
190:
186:
181:
178:
175:
172:
169:
166:
162:
136:
133:
116:
115:
112:
111:
102:
98:
97:
92:
88:
87:
81:
80:
77:
73:
72:
69:
65:
64:
61:
59:(aged 70)
53:
49:
48:
43:
39:
35:
34:
26:
25:
22:
15:
9:
6:
4:
3:
2:
516:
505:
502:
500:
497:
495:
492:
490:
487:
485:
482:
480:
477:
476:
474:
464:
460:
456:
452:
450:
447:
446:
427:
423:
417:
409:
405:
399:
395:
385:
382:
380:
377:
375:
372:
370:
367:
365:
362:
360:
357:
355:
352:
350:
347:
345:
344:Yield surface
342:
341:
335:
333:
329:
325:
320:
318:
308:
306:
302:
301:
300:neutral plane
296:
292:
288:
284:
280:
279:metric system
276:
267:
258:
256:
252:
243:
239:
224:
221:
218:
214:
210:
205:
201:
197:
192:
188:
184:
179:
176:
173:
170:
167:
164:
160:
148:
146:
142:
132:
130:
126:
122:
113:
110:
106:
103:
99:
96:
93:
89:
86:
82:
78:
74:
70:
66:
54:
50:
46:
40:
36:
32:
27:
20:
462:
458:
429:. Retrieved
426:www.asme.org
425:
416:
408:the original
398:
321:
314:
298:
281:. After the
272:
248:
149:
138:
120:
119:
101:Institutions
84:
57:(1885-06-21)
55:21 June 1885
23:Henri Tresca
484:1885 deaths
479:1814 births
330:making the
311:Recognition
68:Nationality
473:Categories
431:2019-11-21
390:References
334:possible.
289:(BIPM) in
131:in Paris.
95:Mechanical
91:Discipline
76:Occupation
319:in 1882.
215:σ
202:σ
198:−
189:σ
161:σ
338:See also
79:Engineer
251:ductile
141:failure
45:Dunkirk
374:Strain
369:Stress
291:Sèvres
157:
71:French
461:, in
62:Paris
211:>
52:Died
38:Born
147:if
475::
424:.
107:,
434:.
225:x
222:a
219:m
206:3
193:1
185:=
180:a
177:c
174:s
171:e
168:r
165:t
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
