Finite element analysis on electromagnetic forming of DP780 high-strength steel sheets

被引：5

作者：

Liu, Dahai ^{[1
]}

Li, Bo ^{[1
]}

Guo, Zhenghua ^{[1
]}

Huang, Zengxin ^{[1
]}

机构：

[1] Nanchang Hangkong Univ, Sch Aeronaut Mfg Engn, 696 Fenghe South Ave, Nanchang 330063, Jiangxi, Peoples R China

来源：

INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY | 2021年 / 112卷 / 5-6期

基金：

中国国家自然科学基金;

关键词：

High-strength steel; Finite element analysis; Electromagnetic forming; Constitutive model; STRAIN-RATE; BEHAVIOR; DP600;

D O I：

10.1007/s00170-020-06537-7

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

In this paper, the effects of strain rate on the mechanical properties of DP780 were analyzed by quasi-static tensile test and Hopkinson bar test; Johnson-Cook constitutive model with high strain rate was established. Based on ANSYS/LS-DYNA finite element program, the finite element simulation of electromagnetic forming process of high-strength steel sheet under the action of driving plate was realized, and the influence of various process parameters on the forming height was studied. The results showed that the yield strength and ultimate tensile strength of the material increased with high strain rate, and DP780 high-strength steel had certain strain rate sensitivity. The drive sheet receives the maximum magnetic field force near the outermost two-turn coil. The deformation of high-strength steel plate mainly occurs under the action of impact inertia. The peak forming height increases with the rise of discharge frequency. The increase of the thickness of the drive sheet can reduce the forming efficiency.

引用

页码：1617 / 1629

页数：13

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