有限元模拟激光冲击波作用下薄膜零件的变形特性

章君; 沈阳

doi:doi:10.14128/j.cnki.al.20183802.295

应用激光, 2018, 38 (2): 295, 网络出版: 2018-06-01

有限元模拟激光冲击波作用下薄膜零件的变形特性

Finite Element Simulation of Deformation Characteristics of Thin-film Part under Laser Shock Wave

论文大纲

章君 ^*沈阳

作者单位

江苏省精密模具产品质量监督检验中心, 江苏昆山 215300

有限元模拟激光冲击波微冲裁翘曲变形残余应力 finite element simulation laser shock wave micro blanking distorting deformation residual stress

摘要

为了掌握在激光冲击波作用下薄膜零件的翘曲变形规律, 采用有限元软件ABAQUS, 模拟了在不同的加载压力和不同的顶块材质情况下, 薄膜零件在超高应变率下的变形特性。模拟结果表明, 顶块材料的强度会影响残余应力分布和薄膜零件的翘曲变形。较低强度的材质可以获得分布状况较好的表面层残余应力场, 当以刚体(超强材料)为顶块时, 薄膜产生反向变形(呈凸状), 且其变形量随着激光冲击峰值压力的增加而增大, 而以较低强度材质为顶块时, 薄膜趋于正向变形(呈凹状)。

Abstract

To understand the distorting deformation of thin-film parts when subjected to laser shock wave, finite element software ABAQUS was used to simulate the deformation characteristics of thin-film parts at ultra-high strain rates. In the simulations, different loading pressures were applied on the thin-film parts, and different kinds of cushion blocks were also used. The simulation results show that the strength of the cushion block will influence the residual stress distribution and distorting deformation of thin-film parts. The lower strength material can obtain better distribution of surface residual stress field. When a rigid body (super-material) is used as the cushion block, the film is reversely deformed (convex), and its deformation increases with the increase of the peak pressure of the laser shock. With a lower strength material as the cushion block, the film tends to be positively deformed (concave).

参考文献

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章君, 沈阳. 有限元模拟激光冲击波作用下薄膜零件的变形特性[J]. 应用激光, 2018, 38(2): 295. Zhang Jun, Shen Yang. Finite Element Simulation of Deformation Characteristics of Thin-film Part under Laser Shock Wave[J]. APPLIED LASER, 2018, 38(2): 295.

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