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首页> 外文期刊>Journal of Materials Engineering and Performance >Laser shock processing induced residual compression: Impact on predicted crack growth threshold performance
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Laser shock processing induced residual compression: Impact on predicted crack growth threshold performance

机译：激光冲击加工引起的残余压缩：对预测的裂纹扩展阈值性能的影响

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摘要

Design credit is not currently taken for laser shock processing (LSP) induced compressive residual stresses in damage tolerant design. The inclusion of these and other compressive stresses in design practice has the potential to dramatically increase predicted fatigue crack growth threshold performance and damage tolerant design life. In the current effort, Ti-6Al-4V coupons will be subjected to shot peening, glass bead peening, and high intensity laser shock processing. The in-depth residual stresses due to processing will be analyzed and then input into a linear elastic fracture mechanics analysis code to predict fatigue crack growth threshold performance. This analysis establishes both the utility and feasibility of incorporating LSP-induced compressive residual stresses into damage tolerant design practice.
机译：目前尚无法在容错设计中将激光冲击处理（LSP）引起的压缩残余应力作为设计依据。在设计实践中包含这些压力和其他压缩应力可能会显着提高预测的疲劳裂纹增长阈值性能和破坏容忍的设计寿命。在目前的努力中，Ti-6Al-4V试样将进行喷丸处理，玻璃珠喷丸处理和高强度激光冲击处理。将分析由于加工引起的深度残余应力，然后将其输入到线性弹性断裂力学分析代码中，以预测疲劳裂纹扩展阈值性能。该分析建立了将LSP引起的压缩残余应力纳入容错设计实践的实用性和可行性。

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