Inelastic Analysis of Components Using a Modulus Adjustment Scheme

[+] Author and Article Information
S. Babu, P. K. Iyer

Solid Mechanics Division, Department of Applied Mechanics, Indian Institute of Technology, Madras 600 036, India

J. Pressure Vessel Technol 120(1), 1-5 (Feb 01, 1998) (5 pages) doi:10.1115/1.2841879 History: Received September 25, 1996; Revised July 16, 1997; Online February 11, 2008


Mechanical components and structures loaded into inelastic region can fail by low cycle fatigue (LCF). Evaluation of inelastic strain is an important stage in the LCF life prediction methodology. Different techniques, viz., experimental methods, elastic-plastic finite element analysis (FEA), and robust methods, can be used to predict inelastic strains. The state predicted by available robust methods does not correspond to equilibrium state of the component. A method called MARS (modulus adjustment and redistribution of stress) based on linear elastic FEA has been developed to obtain equilibrium and kinematic distributions close to the actual one. The proposed method uses an iterative strategy combined with a modulus reduction technique.

Copyright © 1998 by The American Society of Mechanical Engineers
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