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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。
Based on the experiment, a finite element model of unidirectional static tensile necking rapid instability of copper alloy was established based on APDL language and NLISO model of ANSYS software. With the help of General Post Processor tool and Time Hist Post Processor tool of ANSYS, the direct physical images in tensile numerical simulation, stress-strain curves at different positions, strain versus time and true stress-true strain curves were obtained. The simulation results show that the maximum true stress of Mises equivalent is 580 MPa and the theoretical error is less than 10%. The yield strength and the measured error of the simulation are less than 2.5%. The hardening coefficient of the simulated copper alloy is 558 MPa.