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FINITE-ELEMENT ANALYSIS OF DYNAMIC CRACK-GROWTH UNDER PLANE-STRESS IN A VISCOPLASTIC MATERIAL

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Title FINITE-ELEMENT ANALYSIS OF DYNAMIC CRACK-GROWTH UNDER PLANE-STRESS IN A VISCOPLASTIC MATERIAL
 
Creator KUMAR, RK
NARASIMHAN, R
PRABHAKAR, O
 
Subject elastic plastic material
temperature-field
tip
 
Description In this paper, steady-state, dynamic crack growth has been analysed under mode I plane stress, small scale yielding conditions using a finite element procedure. A Perzyna type, overstress viscoplastic constitutive equation has been employed in this analysis. A fracture criterion based on critical plastic strain has been imposed to obtain (theoretically) the variation of dynamic fracture toughness with crack speed, when crack propagation occurs in a ductile mode. The viscoplastic work rate is converted into heat input and the temperature rise distribution is determined by solving the governing conduction/convection equation, also by a finite element method. The effect of rate sensitivity and crack velocity on the fracture toughness and the temperature distribution have been clearly brought out in this study.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-24T10:16:23Z
2011-12-26T12:56:51Z
2011-12-27T05:46:12Z
2011-08-24T10:16:23Z
2011-12-26T12:56:51Z
2011-12-27T05:46:12Z
1990
 
Type Article
 
Identifier ENGINEERING FRACTURE MECHANICS, 37(5), 1071-1084
0013-7944
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10849
http://hdl.handle.net/10054/10849
 
Language en