航空学报 > 2009, Vol. 30 Issue (4): 744-750

窄条激光喷丸成形有限元分析

张兴权1,张永康2,周建忠2,顾永玉2   

  1. 1安徽工业大学 机械工程学院 2江苏大学 机械工程学院
  • 收稿日期:2007-12-21 修回日期:2008-08-03 出版日期:2009-04-25 发布日期:2009-04-25
  • 通讯作者: 张兴权

Finite Element Analysis of Narrow Strip Laser Peening Forming

Zhang Xingquan1, Zhang Yongkang2, Zhou Jianzhong2, Gu Yongyu2   

  1. 1School of Mechanical Engineering, Anhui University of Technology 2School of Mechanical Engineering, Jiangsu University
  • Received:2007-12-21 Revised:2008-08-03 Online:2009-04-25 Published:2009-04-25
  • Contact: Zhang Xingquan

摘要: 基于激光喷丸成形过程中材料非线性、高应变率的特点,建立了适合于激光喷丸成形模型。采用ABAQUS/Explicit模块对材料和应力波相互作用的瞬态过程进行模拟,用ABAQUS/Standard 中模拟应力波作用后材料的松弛。对有限元模拟中的关键技术,如材料模型,冲击波的压力载荷、网格划分及其单元类型进行了探讨。并对航空铝合金LY12CZ的激光窄条喷丸成形进行了有限元模拟,对板料的变形量、应力的大小进行了预测,预测的结果和试验较为一致。

关键词: 激光喷丸, 应力波, 有限元分析, 显式算法, 隐式算法, 变形量, 残余应力

Abstract: Laser peening forming is a novel technology which employs stress waves induced by laser to form a plate. This technology is characterized by high speed, short duration, high strain rate, and non-linearity ofdeformationof materials. This article explicit dynamic analysis is implemented for shock wavesolid interaction, and implicit analysis for relaxation of pressured materials. A model is developed for numerical solution, and some key issues in finite element simulation, such as material model, pressure loading profile, and grid map, are discussed in detail. The stress and deformation field after laser peening are predicted. A series of experimentsof strip laser peening are conducted to validate the model, and the residual stresses are measured by X-ray diffraction (XRD) while deformation is measured by an arc height tester. Experimental data and numerical values are in good agreement.

Key words: laser peening, stress wave, finite element analysis, explicit algorithm, implicit algorithm, deformation magnitude, residual stresses

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