Vol. 3, No. 10, 2008

Download this article
Download this article For screen
For printing
Recent Issues

Volume 12
Issue 3, 249–351
Issue 2, 147–247
Issue 1, 1–146

Volume 11, 5 issues

Volume 10, 5 issues

Volume 9, 5 issues

Volume 8, 8 issues

Volume 7, 10 issues

Volume 6, 9 issues

Volume 5, 6 issues

Volume 4, 10 issues

Volume 3, 10 issues

Volume 2, 10 issues

Volume 1, 8 issues

The Journal
Subscriptions
Editorial Board
Research Statement
Scientific Advantage
Submission Guidelines
Submission Form
Author Index
To Appear
 
ISSN: 1559-3959
Aging degradation of mechanical structures

Somasundaram Valliappan and Calvin K. Chee

Vol. 3 (2008), No. 10, 1923–1938
Abstract

A numerical approach is proposed in this paper for safety assessment of mechanical structures with age-related degradation. Deterioration occurs in mechanical structures due to various environmental attacks and operation conditions which leads to changes in structural performance and structural resistance capacity. By combining techniques such as degradation evaluation methods, damage mechanics, and the finite element method, the proposed numerical method can be used to analyse the responses and damages of mechanical structures with age-related degradation. Ageing degradation effects can be taken into account by introducing degradation factor into formulations of finite element method and damage mechanics. The numerical results for a notched bar and a plate with a central hole are provided to validate the proposed numerical method.

Keywords
mechanical structures, ageing, age-related degradation, finite element method, damage mechanics, numerical analysis
Milestones
Received: 21 May 2007
Revised: 21 February 2008
Accepted: 23 February 2008
Published: 1 December 2008
Authors
Somasundaram Valliappan
School of Civil & Environmental Engineering
The University of New South Wales
Sydney NSW 2052
Australia
http://www.civeng.unsw.edu.au/staff/somasundaram.valliappan
Calvin K. Chee
School of Civil & Environmental Engineering
The University of New South Wales
Sydney NSW 2052
Australia