Cold Expansion Strengthening of 7050 Aluminum Alloy Hole: Structure, Residual Stress, and Fatigue Life

<table class="table-group" id="tab3"><tr><td><table class="table"><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr class="thead"><td class="align_left">Final hole size after reaming</td><td class="align_center">Experimental life</td><td class="align_center">Average</td><td class="align_center">Simulated life</td></tr><tr><td class="thead-hr" colspan="4"><hr/></td></tr><tr><td class="align_left" rowspan="3">7.78 mm</td><td class="align_center">300941</td><td class="align_center" rowspan="3">198887</td><td class="align_center" rowspan="3">168198</td></tr><tr><td class="align_center">115766</td></tr><tr><td class="align_center">179955</td></tr><tr><td class="align_left" rowspan="3">7.98 mm</td><td class="align_center">100070</td><td class="align_center" rowspan="3">124789</td><td class="align_center" rowspan="3">101165</td></tr><tr><td class="align_center">129493</td></tr><tr><td class="align_center">144805</td></tr><tr><td class="align_left" rowspan="3">7.88(blank plate)</td><td class="align_center">28306</td><td class="align_center" rowspan="3">33220</td><td class="align_center" rowspan="3">23919</td></tr><tr><td class="align_center">32549</td></tr><tr><td class="align_center">38806</td></tr><tr class="table-tr"><td colspan="4"><hr class="tbody-hr"/></td></tr></table></td></tr></table>

<div>Comparison of experimental life and simulated life under different reaming amounts.</div>

International Journal of Aerospace Engineering

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Table 3

Table 3: Cold Expansion Strengthening of 7050 Aluminum Alloy Hole: Structure, Residual Stress, and Fatigue Life 