ABSTRACT
The failure data in units of kilocycles (kc) are listed in Table 72.1 for a third set of 102 rectangular aluminum coupons (strips) that was periodically (18 cycles per second) loaded to failure at an intermediate stress of 26 kpsi [1,2]. Failures in Kilocycles (kc) for 102 Aluminum Strips (26 kpsi)
233
318
342
351
363
375
395
408
420
433
452
470
490
258
321
342
352
366
376
396
408
422
437
456
473
491
268
321
342
352
367
379
400
410
423
438
456
474
503
276
329
344
356
370
379
400
412
426
439
460
476
517
290
335
349
358
370
380
400
414
428
439
464
476
540
310
336
350
358
372
382
403
416
432
443
466
486
560
312
338
350
360
372
389
404
416
432
445
468
488
315
338
351
362
374
389
406
416
433
445
470
489
