多点激光微冲击成形的数值模拟研究
Study on numerical simulation of multi-micro laser shock forming
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摘要: 为了预测多点激光微冲击成形情况,采用ABAQUS软件建立多点激光微冲击成形的有限元模型,并对模拟结果进行实验验证;在此基础上,研究工艺参数对激光微冲击成形的影响规律。结果表明:多点激光微冲击成形数值模拟有效地展示了激光冲击区域的三维变形特征,并且特征路径上表面形貌分布与实验结果吻合。板材最大变形量随激光能量、搭接率和光斑直径的变化规律,与实验结果一致,证实采用数值模拟的方法能有效的预测多点激光冲击成形特征,为多点激光微冲击工艺研究提供指导。Abstract: In order to predict multi-micro laser shock forming, finite element model of multi-micro laser shock forming was built using ABAQUS software and simulation results were validated by experiment. On this basis, influence law of process parameters on micro laser shock forming was discussed. The results show that numerical simulation of multi-micro laser shock forming effectively shows three-dimensional deformation characteristics of laser impact area, and distribution of surface morphology under characteristic path is consistent with the experimental results. The influence law of sheet maximum deformation with laser energy, overlapping rate and diameter of laser spot conforms to experiment results. It confirms that numerical simulation can correctly predict the morphology of multi-micro laser shock forming, and provide good guidance for research on multi-micro laser shock forming.