A Modified Drucker-Prager/Cap Model for Powder Metallurgy

被引：0

作者：

Wang Chao ^{[1
,2
]}

Xiao Lei ^{[1
]}

Zhang Gaoxiang ^{[1
]}

Guo Jianzheng ^{[1
,3
]}

机构：

[1] Shenzhen Wedge Cent South Res Inst Co Ltd, Shenzhen 518045, Peoples R China

[2] Shenzhen Wedge Aviat Technol Co Ltd, Shenzhen 518045, Peoples R China

[3] Cent South Univ, Powder Met Inst, Changsha 410083, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2020年 / 49卷 / 09期

关键词：

powder metallurgy; hot isostatic pressing; FEM; constitutive model; Drucker-Prager/Cap; FINITE-ELEMENT SIMULATION; COMPOSITE POWDERS; PLASTICITY THEORY; COLD COMPACTION; DENSIFICATION; DEFORMATION;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Powder metallurgy is an important part of the forming process for metal materials. However, most material models are not able to simulate the variation of mechanical characters during the compressing process. In this paper, the Drucker-Prager/Cap model was modified by introducing the yield strength of fully densified metal. This modified Drucker-Prager/Cap model can limit the yield strength of metal powder within the Von Mises surface of a fully densified metal. With the compressing process, the powder's surface is infinitely close to Von Mises surface. By comparing the model prediction and the published experimental results, it is demonstrated that this modified model works well in terms of accuracy. And, it is applied to the simulation of a hot isostatic pressing for a superalloy. The prediction of the deformation as well as the stress distribution by this model is more accurate than that by the traditional Drucker-Prager/Cap model.

引用

页码：3115 / 3121

页数：7

共 27 条

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