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激光喷丸强化(LSP)是一种基于冲击波力效应的非传统抗疲劳制造技术,目前关于激光喷丸强化的研究大多集中在机制和实验上。由于激光冲击过程是一个复杂的热力耦合过程,涉及的因素较多,实验方法难于全面理解各种参数对激光喷丸效果的关联影响。介绍了典型的激光喷丸强化过程的数字化分析方法,以有限元分析工具ABAQUS和MSC.Fatigue为平台,通过编制激光冲击波加载模块,解决了数据流传递中的接口问题。以2024-T3航空铝合金试样为例,对激光喷丸强化过程中激光冲击波的传播、残余应力大小以及疲劳特性行为等进行了数值分析,并对激光喷丸强化的疲劳寿命进行了预测,建立起了激光冲击波压力-残余应力-疲劳寿命之间的数字化分析方法,实现了激光喷丸过程和喷丸效果评价的可视化。
Laser shot peening (LSP) is a non-traditional anti-fatigue manufacturing technology based on the shock wave effect. At present, the research on laser shot peening mostly focuses on mechanism and experiment. As the laser shock process is a complex thermal coupling process, involving many factors, the experimental method is difficult to fully understand the impact of various parameters on the laser peening effect. A typical digital analysis method of laser shot peening is introduced. With the finite element analysis tools ABAQUS and MSC.Fatigue as the platform, the laser shock wave loading module is used to solve the interface problem in data flow delivery. Taking the 2024-T3 aviation aluminum alloy as an example, the numerical analysis of laser shock wave propagation, residual stress and fatigue behavior during laser shot peening was carried out. The fatigue life of laser shot peening was predicted, The digital analysis method of laser shock wave pressure-residual stress-fatigue life was established, which realized the visualization of laser shot peening and shot peening evaluation.