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Technical Briefs

Cyclic Elastoplastic Analysis of Structures Concerning a Fatigue Assessment According to the Local Strain Approach: An Overview

[+] Author and Article Information
Abílio M. De Jesus

Engineering Department—Mechanical Engineering, University of Trás-os-Montes and Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugalajesus@utad.pt

Hélder F. Pereira

 UCVE, IDMEC—Pólo FEUP, Rua Dr. Roberto Frias, 4200-465 Porto, Portugalhfpereira@portugalmail.pt

Alfredo S. Ribeiro

Engineering Department—Mechanical Engineering, University of Trás-os-Montes and Alto Douro, Quinta de Prados, 5001-801 Vila Real, Portugalaribeiro@utad.pt

António A. Fernandes

Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugalaaf@fe.up.pt

J. Pressure Vessel Technol 130(3), 034503 (Aug 06, 2008) (4 pages) doi:10.1115/1.2965904 History: Received August 07, 2006; Revised March 26, 2007; Published August 06, 2008

This Technical Brief presents an overview about the current methodologies for elastoplastic calculation of structures undergoing cyclic loading, aiming a fatigue assessment according to the local strain approaches. The possibilities and limitations of the plasticity models available in most popular commercial finite element codes are discussed. Also, several methodologies for structural elastoplastic analysis, concerning the derivation of the stabilized material response, are also addressed highlighting their potentialities and drawbacks. The discussion proposed in this Technical Brief is intended as guidance for design engineers needing to ponder all calculation alternatives for assessing fatigue damage parameters before a rational decision is carried out, in the framework of local approaches to fatigue.

Copyright © 2008 by American Society of Mechanical Engineers
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