Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber-Reinforced 2060 Al-Li Alloy Laminates under Spectrum Loading

<table class="table-group" id="tab4"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Stress level (MPa)</td><td class="align_center">180</td><td class="align_center">170</td><td class="align_center">140</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left">Model</td><td class="align_center">Me</td><td class="align_left"> </td><td class="align_left"> </td></tr><tr><td class="align_left">Goodman</td><td class="align_center">0.171</td><td class="align_center">0.101</td><td class="align_center">0.283</td></tr><tr><td class="align_left">Pwlinear</td><td class="align_center">−0.224</td><td class="align_center">−0.300</td><td class="align_center">−0.218</td></tr><tr><td class="align_left">PNL</td><td class="align_center">−0.713</td><td class="align_center">−0.825</td><td class="align_center">−0.772</td></tr><tr><td class="align_left">Bell</td><td class="align_center">−0.547</td><td class="align_center">−0.680</td><td class="align_center">−0.667</td></tr><tr><td class="align_left">Boerstra</td><td class="align_center">−0.508</td><td class="align_center">−0.562</td><td class="align_center">−0.324</td></tr><tr><td class="align_left">Kawai</td><td class="align_center">0.581</td><td class="align_center">0.504</td><td class="align_center">0.627</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of model prediction results for the 3/2 laminates under spectrum loading.</div>

Advances in Materials Science and Engineering

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Table 4

Table 4: Effect of Mean Stress on the Fatigue Life Prediction of Notched Fiber-Reinforced 2060 Al-Li Alloy Laminates under Spectrum Loading 