AZ31 镁合金压痕-压平复合形变数值模拟

目的研究AZ31镁合金压痕-压平复合形变过程中工艺参数对形变区温度场、应力场、应变场、塑性变形力的影响规律。方法采用有限元模拟软件,对复合形变过程进行数值模拟研究,获得不同工艺参数条件下,温度场、应力场、应变场、塑性变形力的变化规律。结果在压痕形变过程中,随着形变温度的增大,形变区温度场的最高温度随之增大,最大塑性变形力的随之减小。在压痕形变过程中,随着模具温度的增大,形变区温度场的最高温度随之增大,最大塑性变形力随之减小。结论实验结果与数值模拟结果相吻合,说明数值模拟过程中的几何模型及相关参数设定是合理的。

Numerical Analysis of Indenten-flatten Compound Deformation Technology of AZ31 Magnesium Alloy

The paper aims to study the influence law of technological parameters on temperature field, stress field, strain field and deformation force in deformation zone during indenten-flatten compound deformation technology (IFCDT) of AZ31 magnesium alloy. A finite element simulation software was adopted to simulate and research the process of compound deformation to obtain change rules of temperature field, stress field, strain field and deformation force at different technological parameters. During deformation process of IFCDT, with the increase of deformation temperature, the highest temperature in deformation zone increased, and the maximum deformation force decreased. With the increase of the die temperature, the highest temperature in deformation zone increased, and the maximum plastic deformation force decreased. The experimental results are in agreement with that of simulation. Settings of geometric model and relevant parameters in the numerical simulation are reasonable.