铜合金单向静拉伸颈缩失稳的有限元模拟
Finite Element Simulation of Uniaxial Tensile Necking Instability
刘文忠1, 熊 倩2, 蒋 渝1
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作者单位：(1. 四川大学 材料科学与工程学院, 四川 成都 610065; 2. 成都宏博科技发展有限公司, 四川 成都 610041)
中文关键字：APDL语言； 颈缩失稳； NLISO模型； 数值模拟
英文关键字：APDL language; necking instability; NLISO model; numerical simulation
中文摘要：在实验基础上，基于ANSYS软件的APDL语言和NLISO模型，建立铜合金单向静拉伸颈缩快速失稳的有限元模型。运用ANSYS的General Post Processor工具和Time Hist Post Processor工具获得了拉伸数值模拟过程中的直观物理图像、不同部位应力随时间变化曲线、应变随时间变化曲线以及真应力-真应变曲线。结果表明：模拟得到Mises等效最大真应力为580 MPa，与理论误差不超过10%；模拟所得屈服强度与实测误差不超过2.5%；模拟所得铜合金的硬化系数为558 MPa。
英文摘要：Based on experiment, using APDL language of ANSYS software and NLISO model, FEM model for uniaxial tensile necking instability of copper alloy was established. Using general post processor and time hist post processor of the ANSYS software, the direct physical image, and the curves of true stress-time and true strain-time of the different location and the true stress-true strain curves were obtained. The results show that the error between simulation and experiment is below 10% for the maximum Mises equivalent true stress and below 2.5% for the yield strength. Meanwhile, the strength coefficient of the copper alloy is 558 MPa.