Energy Based Characterization of Fatigue Behaviour of Cyclically Unstable Materials

Ewald Macha; Jacek Slowik; Roland Pawliczek

doi:10.4028/www.scientific.net/SSP.147-149.512

Paper Titles

Fault Identifiability Problem – The Multi-Valued Diagnostic Model Approach
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Possibilities of Assessment of the Control Potential of Aircraft Engines
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Presentations in FAM-C And FDM-A Methods and Some Problems of a Signals Theory
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Energy Based Characterization of Fatigue Behaviour of Cyclically Unstable Materials
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Mobile Robot Diagnosis with Bayesian Filters
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Operating Degradations of Air Turbine Scoops of Turbo-Engines
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Turbine Engine Health/Maintenance Status Monitoring with Use of Phase-Discrete Method of Blade Vibration Monitoring
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Load Carrying Capacity of Microbearings with Parabolic Journal
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Energy Based Characterization of Fatigue Behaviour of Cyclically Unstable Materials

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.