Table 2. Comparison of mechanical testing failure load vs. failure load found from FEA, Curve beam and straight beam model.
Sample No. | Intact |
Defect |
||||||
---|---|---|---|---|---|---|---|---|
Mech | FEA | Curve | Straight | Mech | FEA | Curve | Straight | |
1 | 7852 | 7416 | 8533 | 9318 | 3002 | 4149 | 2856 | 6163 |
2 | 5007 | 4501 | 6474 | 6626 | 1853 | 3367 | 1619 | 2077 |
3 | 5031 | 5173 | 5046 | 10785 | 2181 | 2034 | 2465 | 7227 |
4 | 4728 | 5197 | 4192 | 5587 | 2806 | 3541 | 2201 | 6462 |
5 | 4141 | 3281 | 6347 | 9202 | 1237 | 1421 | 1898 | 5117 |
6 | 4660 | 4886 | 4765 | 8587 | 3960 | 4981 | 5332 | 10740 |
7 | 11034 | 11477 | 11047 | 13861 | 3980 | 4976 | 5419 | 7134 |
8 | 7970 | 7372 | 8462 | 9669 | 5985 | 6055 | 6988 | 11992 |
9 | 6821 | 7132 | 7974 | 13491 | 6547 | 7254 | 6733 | 11611 |
10 | 10470 | 9029 | 8852 | 9827 | 8815 | 8787 | 8594 | 8899 |
Failure Load Average (N) | 6771 ± 2498 | 6547 ± 2440 | 7169 ± 2170 | 8719 ± 2965 | 4037 ± 2394 | 4656 ± 2273 | 4410 ± 2508 | 9695 ± 2601 |
Bland-Altman method, 95% Cl | −1032 to 1482 | −2503 to 1707 | −7541 to 1693 | −1732 to 493 | −1776 to 1028 | −8052 to 641 | ||
Mean ± SD of difference vs. mechanical testing | 225 ± 641 | −398 ± 1074 | −2924 ± 2356 | −619 ± 568 | −374 ± 715 | −3705 ± 2218 | ||
P-value (paired t-test) | 0.2965 | 0.2714 | 0.0035 | 0.0072 | 0.1327 | 0.0005 | ||
Kendall Tau ranking coefficients (mechanical testing vs other methods) | 0.82 | 0.73 | 0.51 | 0.91 | 0.87 | 0.56 | ||
Total | ||||||||
Mech | FEA | Curve | Straight | |||||
Failure Load Average (N) | 5404 ± 2764 | 5601 ± 2491 | 5790 ± 2685 | 7742 ± 3111 | ||||
Bland-Altman method (N), 95% Cl | −1631 to 1236 | −2127 to 1355 | −7749 to 1120 | |||||
Mean ± SD of difference vs. mechanical testing | −197 ± 731 | −385 ± 888 | −3315 ± 2262 | |||||
P-value (paired t-test) | 0.2419 | 0.067 | 2.8e-6 | |||||
Kendall Tau ranking coefficients (mechanical testing vs other methods) | 0.83 | 0.84 | 0.53 |