Paper Title:

Energy Based Characterization of Fatigue Behaviour of Cyclically Unstable Materials

Periodical Solid State Phenomena (Volumes 147 - 149)
Main Theme Mechatronic Systems and Materials III
Edited by Zdzislaw Gosiewski and Zbigniew Kulesza
Pages 512-517
DOI 10.4028/www.scientific.net/SSP.147-149.512
Citation Ewald Macha et al., 2009, Solid State Phenomena, 147-149, 512
Online since January, 2009
Authors Ewald Macha, Jacek Slowik, Roland Pawliczek
Keywords Cyclic Instability, Digital Control, High Cycle Fatigue, Low Cycle Fatigue, Mechatronic Systems, Random Loading, Strain Energy Parameter
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Abstract

The paper presents a definition of a new energy based parameter which allows to better describe fatigue proprieties of materials, especially cyclically unstable materials in comparison with the Lagoda-Macha parameter. The proposed parameter distinguishes positive and negative work of external force and depends on the sign of the stresses in paths of strain in materials. It is used in laboratory tests for control of a fatigue process on hydraulic stand. A close-loop control system has been equipped with computer program based on MATLAB/Simulink module.