Fracture prediction in stretch forming using finite element simulation combined with ductile fracture criterion

1997 ◽  
Vol 67 (3) ◽  
pp. 143-150 ◽  
Author(s):  
H. Takuda ◽  
K. Mori ◽  
H. Fujimoto ◽  
N. Hatta
Keyword(s):  
Finite Element ◽  
Ductile Fracture ◽  
Finite Element Simulation ◽  
Fracture Criterion ◽  
Fracture Prediction ◽  
Ductile Fracture Criterion ◽  
Stretch Forming ◽  
Element Simulation

scholarly journals Finite Element Analysis of Bore-expanding Processes with Ductile Fracture Criterion

1998 ◽  
Vol 84 (3) ◽  
pp. 182-187 ◽  
Author(s):  
Hirohiko TAKUDA ◽  
Ken-ichiro MORI ◽  
Masashi KANESHIRO ◽  
Natsuo HATTA
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Ductile Fracture ◽  
Fracture Criterion ◽  
Ductile Fracture Criterion ◽  
Element Analysis

Prediction and analysis of ductile fracture in sheet metal forming—Part I: A modified Ayada criterion

2014 ◽  
Vol 23 (8) ◽  
pp. 1189-1210 ◽  
Author(s):  
HS Liu ◽  
MW Fu
Keyword(s):  
Finite Element ◽  
Plastic Strain ◽  
Ductile Fracture ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Fracture Criterion ◽  
Ductile Fracture Criterion ◽  
Wide Range ◽  
Stress States

A modified ductile fracture criterion is proposed based on the traditional Ayada criterion and coded into the finite element simulation platform of VUMAT/ABAQUS for prediction and analysis of ductile fracture in metal plastic strain processes. In this modified ductile fracture criterion, stress triaxiality is taken into account, and more importantly, the exponential effect of the equivalent plastic strain on the damage behavior, which is generally ignored in other ductile fracture criteria, is also considered. The material related constants in the modified ductile fracture criterion are determined by tensile tests together with finite element simulations. The applicability and reliability of the ductile fracture criterion in ductile fracture prediction in two types of classic stress states, viz. shear stress, tensile stress in sheet metal forming, are investigated based on the deformation behavior and fracture occurrence in two case studies with two typical types of materials, i.e. Al 6061 and T10A. The materials have a wide range of plasticity. The simulation and experimental results verify the applicability and reliability of the developed ductile fracture criterion in prediction of the ductile fracture with and without necking in different stress states of plastic strain.

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