基于SPH法的AZ31镁合金ECAP过程数值模拟

王晨晨; 牛晓峰; 薄延强; 阎佩雯; 赵静雨; 宋振亮

doi:10.15980/j.tzzz.2018.09.007

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基于SPH法的AZ31镁合金ECAP过程数值模拟
Numerical Simulation of AZ31 Magnesium Alloy during ECAP Based on SPH
2018年38卷第9期页码：953-955
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.09.007

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[1]王晨晨,牛晓峰,薄延强,阎佩雯,赵静雨,宋振亮.基于SPH法的AZ31镁合金ECAP过程数值模拟[J].特种铸造及有色合金,2018,38(09):953-955.

Wang Chenchen, Niu Xiaofeng, Bo Yanqiang, et al. Numerical Simulation of AZ31 Magnesium Alloy during ECAP Based on SPH[J]. Special Casting & Nonferrous Alloys, 2018,38(9):953-955.
[1]王晨晨,牛晓峰,薄延强,阎佩雯,赵静雨,宋振亮.基于SPH法的AZ31镁合金ECAP过程数值模拟[J].特种铸造及有色合金,2018,38(09):953-955. DOI： 10.15980/j.tzzz.2018.09.007.

Wang Chenchen, Niu Xiaofeng, Bo Yanqiang, et al. Numerical Simulation of AZ31 Magnesium Alloy during ECAP Based on SPH[J]. Special Casting & Nonferrous Alloys, 2018,38(9):953-955. DOI： 10.15980/j.tzzz.2018.09.007.

摘要

引入一种新的无网格法——光滑粒子流体动力学法（Smooth Particle Hydrodynamics

SPH）

将问题域离散为一系列粒子

避免了由于网格的划分导致计算精度下降。通过建立数学模型并编写SPH方法程序

对AZ31镁合金ECAP过程在高挤压速度下的裂纹萌生和扩展进行数值模拟

并将模拟结果与有限元模拟结果及试验结果进行对比

验证了所建SPH程序的准确性及可行性。

Abstract

A new meshless method SPH（Smooth Particle Hydrodynamics

SPH）was introduced.The SPH method can discretize the problem domain into a series of particles to avoid the decrease in calculation accuracy due to the division of the mesh.A mathematical model and SPH program were adopted to simulate and analyze the crack initiation and propagation of AZ31 magnesium alloy during ECAP process at high extrusion speeds.The simulated results were compared with the finite element simulation and experimental ones to verify the validity and feasibility of the SPH program.