Fracture prediction of lead sleeve based on mesoscopic damage mechanics

被引：0

作者：

Xu W.-J. ^{[1
]}

Xie D. ^{[1
]}

Li F. ^{[1
]}

Gao Y.-P. ^{[1
]}

机构：

[1] Chongqing University, College of Materials Science and Engineering, Chongqing

来源：

Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2020年 / 30卷 / 08期

关键词：

Formation of lead sleeve; Fracture prediction; GTN micro-damage model; Response surface method; Scanning electron microscope;

D O I：

10.11817/j.ysxb.1004.0609.2020-37612

中图分类号：

学科分类号：

摘要：

The fracture prediction in the forming process of bullet lead sleeve was studied. The true stress-strain data of pure lead were obtained by uniaxial tensile test, in which the strain range of 0.006≤ε≤0.2 was selected for fitting and extrapolating to obtain the damage free constitutive relationship. The parameters of the GTN micro-damage model of pure lead were acquired by means of scanning electron microscopy analysis and inverse finite element simulation based on response surface method. The load displacement curve and void volume fraction of lead material obtained by simulation and experiment in uniaxial tension were compared and analyzed, which verified the accuracy of the parameters in the GTN model of pure lead. Based on ABAQUS simulation platform, coupled with the GTN damage model, the fracture behavior of lead sleeve during forming process was simulated and predicted. The experiments of back extrusion and thinning deep drawing for lead sleeve were carried out. The results show that the experimental results match well with the simulation results based on GTN damage model. The accurate prediction of forming defects of lead sleeve is an important basis for forming optimization. © 2020, Science Press. All right reserved.

引用

页码：1866 / 1875

页数：9

共 16 条

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