Investigation on Blanking of Thick Sheet Metal Using the Ductile
Fracture Initiation and Propagation Criterion

doi:10.1007/s12204-012-1320-y

上海交通大学学报（英文版） ›› 2012, Vol. 17 ›› Issue (5): 531-536.doi: 10.1007/s12204-012-1320-y

Investigation on Blanking of Thick Sheet Metal Using the Ductile Fracture Initiation and Propagation Criterion

YU Songa* (虞松), ZHAO Junb (赵军)

(a. School of Civil Engineering; b. School of Mechanical Engineering, Shandong University, Ji’nan 250061, China)

出版日期:2012-10-30 发布日期:2012-11-16
通讯作者: YU Songa* (虞松) E-mail:yusong@sdu.edu.cn

Investigation on Blanking of Thick Sheet Metal Using the Ductile Fracture Initiation and Propagation Criterion

YU Songa* (虞松), ZHAO Junb (赵军)

(a. School of Civil Engineering; b. School of Mechanical Engineering, Shandong University, Ji’nan 250061, China)

Online:2012-10-30 Published:2012-11-16
Contact: YU Songa* (虞松) E-mail:yusong@sdu.edu.cn

摘要/Abstract

摘要： In metal forming processes such as sheet blanking, severe plastic deformation localizes in a narrow shear band near blanking clearance, and ductile fracture occurs at the final stage. Because the combinations of large nonlinear strain localization, displacement discontinuity and ductile fracture brought obstacles to numerical simulation, a ductile fracture initiation criterion model and an elasto-plastic finite element method (FEM) were presented to simulate localized severe plastic deformation. Initiation and propagation of cracks were treated by deletion-and-replacement approach. The distributions and developing trends of effective strain and damage were predicted, the influence of blanking clearance on fracture was discussed, and an experiment was performed to explore the forming mechanism.

关键词: severe plastic deformation, elasto-plastic finite element method (FEM), ductile fracture, shear band

Abstract: In metal forming processes such as sheet blanking, severe plastic deformation localizes in a narrow shear band near blanking clearance, and ductile fracture occurs at the final stage. Because the combinations of large nonlinear strain localization, displacement discontinuity and ductile fracture brought obstacles to numerical simulation, a ductile fracture initiation criterion model and an elasto-plastic finite element method (FEM) were presented to simulate localized severe plastic deformation. Initiation and propagation of cracks were treated by deletion-and-replacement approach. The distributions and developing trends of effective strain and damage were predicted, the influence of blanking clearance on fracture was discussed, and an experiment was performed to explore the forming mechanism.

Key words: severe plastic deformation, elasto-plastic finite element method (FEM), ductile fracture, shear band

中图分类号:

TG 386

YU Songa* (虞松), ZHAO Junb (赵军). Investigation on Blanking of Thick Sheet Metal Using the Ductile Fracture Initiation and Propagation Criterion[J]. 上海交通大学学报（英文版）, 2012, 17(5): 531-536.

YU Songa* (虞松), ZHAO Junb (赵军). Investigation on Blanking of Thick Sheet Metal Using the Ductile Fracture Initiation and Propagation Criterion[J]. Journal of shanghai Jiaotong University (Science), 2012, 17(5): 531-536.

参考文献

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Investigation on Blanking of Thick Sheet Metal Using the Ductile Fracture Initiation and Propagation Criterion

Investigation on Blanking of Thick Sheet Metal Using the Ductile Fracture Initiation and Propagation Criterion

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