Theoretical Analysis on Deformation of Sheet Metal under One Laser Shot Loading
Theoretical Analysis on Deformation of Sheet Metal under One Laser Shot Loading
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发表时间：
2005
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通讯作者：
Z. Jianzhong
中科院分区：
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作者：
Z. Jianzhong
激光冲击成形是一种利用激光冲击产生的压缩冲击波作用于金属表面而实现的新技术。激光冲击成形是一个机械过程，而不是热过程，具有超高压、超塑性等显著特征。本文根据爆轰波和爆炸气体动力学理论，建立了激光冲击成形的物理模型，并给出了激光冲击成形冲击波压力的估算公式。在实验和理论分析的基础上，建立了单次激光冲击下板料变形的数学模型，讨论了冲击波压力与板料变形的关系，分析了激光参数、边界条件等因素对板料变形的影响。这些模型和公式可用于预测板料在激光冲击载荷作用下的变形，为合理选择激光工艺参数和编制激光冲击成形控制软件提供理论依据。
Laser shock forming (LSF) is a novel technique realized by applying a compressive shock wave generated by laser shock on the surface of the metal. It is a mechanical, not a thermal process, and has a significant characterization of ultra-pressure and super plastic forming etc. In this paper, a physical model and the estimated formula of shockwave pressure of laser shock forming were found according to the detonation wave and explosive gas dynamical theory. On the base of experimental results and theory analysis, a mathematical model of the sheet deformation under one laser shot loading was established, the relationship between shockwave pressure and deformation of sheet metal was discussed, and the effects of factors such as laser parameters, boundary condition on the deformation of sheet metal were analyzed. These model and formula are very useful and can be used to predict the deformation of sheet metal loaded by laser shock, and provide a theory foundation to choose laser processing parameters reasonably and program the controlled software of laser shock forming.