Fatigue Crack Growth in 7050T7451 Aluminium Alloy Thick Section ...

DSTO-TR-1477126.5 41102 0.1638 0.2522 0.2438127.5 41427 0.1781 0.2665 0.2581128.5 41752 0.1942 0.2826 0.2742129.5 42077 0.2124 0.3008 0.2924130.5 42402 0.2275 0.3159 0.3075131.5 42727 0.253 0.3414 0.333132.5 43052 0.2636 0.352 0.3436133.5 43377 0.2826 0.371 0.3626134.5 43702 0.3103 0.3987 0.3903135.5 44027 0.3313 0.4197 0.4113136.5 44352 0.3623 0.4507 0.4423137.5 44676 0.3973 0.4857 0.4773138.5 45001 0.4284 0.5168 0.5084139.5 45326 0.4709 0.5593 0.5509140.5 45651 0.5195 0.6079 0.5995141.5 45976 0.5801 0.6685 0.6601143.5 46626 0.6817 0.7701 0.7617144.5 46951 0.7435 0.8319 0.8235145.5 47276 0.8181 0.9065 0.8981146.5 47601 0.8897 0.9781 0.9697147.5 47926 0.9878 1.0762 1.0678148.5 48251 1.1356 1.224 1.2156149.5 48576 1.2591 1.3475 1.3391150.5 48900 1.3887 1.4771 1.4687152.5 49550 1.7064 1.7948 1.7864153.5 49875 2.0829 2.1713 2.1629154.5 50200 2.6026 2.691 2.6826155.5 50525 3.4098 3.4982 3.4898156.5 50850 5.4922 5.5806 5.5722Table A-2. Results of the quantitative fractography on KSIF 107, peak stress 360MPaNo. of spectraIARPO3a + 5 markerloadsSimulated FlightHoursMeasurement fromflaw edge to crackpositionmm.Addition of Type IEPS (measured flawdepth)mmAddition of Type IIEPSmm0 0 0.0064 0.008144.5 46951 0.0314 0.0378 0.0394145.5 47276 0.0317 0.0381 0.0397156.5 50850 0.0412 0.0476 0.0492157.5 51175 0.042 0.0484 0.05158.5 51500 0.0431 0.0495 0.0511159.5 51825 0.0438 0.0502 0.0518160.5 52150 0.0449 0.0513 0.0529161.5 52475 0.0453 0.0517 0.0533162.5 52800 0.0464 0.0528 0.0544163.5 53124 0.0468 0.0532 0.0548164.5 53449 0.0476 0.054 0.0556165.5 53774 0.0491 0.0555 0.0571166.5 54099 0.0498 0.0562 0.0578167.5 54424 0.0506 0.057 0.0586168.5 54749 0.051 0.0574 0.059169.5 55074 0.0521 0.0585 0.0601170.5 55399 0.0525 0.0589 0.0605171.5 55724 0.0533 0.0597 0.0613172.5 56049 0.054 0.0604 0.062173.5 56374 0.0552 0.0616 0.0632174.5 56699 0.0559 0.0623 0.0639175.5 57023 0.0567 0.0631 0.0647176.5 57348 0.0579 0.0643 0.0659177.5 57673 0.0586 0.065 0.0666178.5 57998 0.0594 0.0658 0.0674179.5 58323 0.0606 0.067 0.0686180.5 58648 0.0617 0.0681 0.0697181.5 58973 0.0625 0.0689 0.070537