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A probabilistic mechanical model for simulating fatigue failure in metals – modelling the damage accumulation process

A probabilistic mechanical model for simulating fatigue failure in metals – modelling the damage... It is demonstrated that analysis of a probabilistic model for simulating the fatigue process in metals previously reported leads to the well-known Palmgren-Miner Law for fatigue damage accumulation. In a paper published in the Journal of Damage Mechanics, a mechanical model was presented that was used to simulate the S-N relations in metal fatigue problems. The simulation is accomplished by a model which is a system containing a number of sliding blocks connected by springs which rupture sequentially during cycles of applied stress. When a sufficiently large number of springs have ruptured, the entire system is presumed to have failed in fatigue. Further work on the model was completed by the authors on the capabilities of the model. The behaviour of the system, when subjected to a number of stress cycles, was investigated by analysing the cycle by cycle accumulation of stress-strain hysteresis. Through simulations, it has been shown that the model can closely portray the linear damage accumulation process as predicted by the Palmgren-Miner Law. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png International Journal of Structural Engineering Inderscience Publishers

A probabilistic mechanical model for simulating fatigue failure in metals – modelling the damage accumulation process

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Publisher
Inderscience Publishers
Copyright
Copyright © Inderscience Enterprises Ltd. All rights reserved
ISSN
1758-7328
eISSN
1758-7336
DOI
10.1504/IJStructE.2011.039419
Publisher site
See Article on Publisher Site

Abstract

It is demonstrated that analysis of a probabilistic model for simulating the fatigue process in metals previously reported leads to the well-known Palmgren-Miner Law for fatigue damage accumulation. In a paper published in the Journal of Damage Mechanics, a mechanical model was presented that was used to simulate the S-N relations in metal fatigue problems. The simulation is accomplished by a model which is a system containing a number of sliding blocks connected by springs which rupture sequentially during cycles of applied stress. When a sufficiently large number of springs have ruptured, the entire system is presumed to have failed in fatigue. Further work on the model was completed by the authors on the capabilities of the model. The behaviour of the system, when subjected to a number of stress cycles, was investigated by analysing the cycle by cycle accumulation of stress-strain hysteresis. Through simulations, it has been shown that the model can closely portray the linear damage accumulation process as predicted by the Palmgren-Miner Law.

Journal

International Journal of Structural EngineeringInderscience Publishers

Published: Jan 1, 2011

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