Plastic flow collapse vs. separation collapse (fracture) in elastic-plastic strain-hardening structures

1983 ◽  
Vol 16 (2) ◽  
pp. 85-96 ◽  
Author(s):  
A. Carpinteri
Keyword(s):  
Plastic Strain ◽  
Strain Hardening ◽  
Plastic Flow ◽  
Elastic Plastic

Ductile Tearing Instability of a Center-Cracked Panel of an Elastic-Plastic Strain Hardening Material

1981 ◽  
Vol 103 (1) ◽  
pp. 46-54 ◽  
Author(s):  
Akram Zahoor ◽  
Paul C. Paris
Keyword(s):  
Plastic Strain ◽  
Strain Hardening ◽  
Plane Strain ◽  
Plane Stress ◽  
Hardening Material ◽  
Ductile Tearing ◽  
Elastic Plastic ◽  
Linear Elastic ◽  
Tearing Instability ◽  
Crack Stability

An analysis for crack instability in an elastic-plastic strain hardening material is presented which utilizes the J-integral and the tearing modulus parameter, T. A center-cracked panel of finite dimensions with Ramberg-Osgood material representation is analyzed for plane stress as well as plane strain. The analysis is applicable in the entire range of elastic-plastic loading from linear elastic to full yield. Crack instability is strongly influenced by the elastic compliance of the system, the conditions of plane stress or plane strain, and the hardening characteristics of the material. Numerical results indicate that if crack stability is ensured in a plane strain situation, then under the same circumstances a geometrically identical but plane stress panel will be stable.

Strain Hardening Response of Sintered Porous Iron Tubes With Various Initial Porosities Under Combined Tension and Torsion

1992 ◽  
Vol 114 (2) ◽  
pp. 213-217 ◽  
Author(s):  
K. T. Kim ◽  
Y. S. Kwon
Keyword(s):  
Experimental Data ◽  
Plastic Strain ◽  
Strain Hardening ◽  
Constitutive Equations ◽  
Yield Function ◽  
Porous Iron ◽  
Constitutive Theories ◽  
Elastic Plastic ◽  
Theoretical Predictions

Elastic-plastic strain hardening responses of sintered porous iron are investigated. By using the yield function of Kim, two sets of constitutive equations are obtained from the constitutive theories by Kim and Suh and by Gurson. Theoretical predictions from these constitutive equations are compared with experimental data for sintered porous iron tubes with various initial porosities under combined tension and torsion.

Sign in / Sign up

Export Citation Format

Share Document