Application of a Shear-Modified GTN Model to Incremental Sheet Forming

被引：5

作者：

Smith, Jacob ^{[1
]}

Malhotra, Rajiv ^{[1
]}

Liu, W. K. ^{[1
]}

Cao, Jian ^{[1
]}

机构：

[1] Northwestern Univ, Dept Mech Engn, Evanston, IL 60208 USA

来源：

NUMISHEET 2014: THE 9TH INTERNATIONAL CONFERENCE AND WORKSHOP ON NUMERICAL SIMULATION OF 3D SHEET METAL FORMING PROCESSES: PART A BENCHMARK PROBLEMS AND RESULTS AND PART B GENERAL PAPERS | 2013年 / 1567卷

关键词：

Incremental Forming; Void Mechanics; Finite Element Analysis; FRACTURE;

D O I：

10.1063/1.4850097

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper investigates the effects of using a shear-modified Gurson-Tvergaard-Needleman model, which is based on the mechanics of voids, for simulating material behavior in the incremental forming process. The problem chosen for analysis is a simplified version of the NUMISHEET 2014 incremental forming benchmark test. The implications of the shear-modification of the model specifically for incremental sheet forming processes are confirmed using finite element analysis. It is shown that including the shear term has a significant effect on fracture timing in incremental forming, which is not well reflected in the observed tensile test simulations for calibration. The numerical implementation and the need for comprehensive calibration of the model are briefly discussed.

引用

页码：824 / 827

页数：4

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