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Assessment of Validity of Selected Criteria of Fatigue Life Prediction
Krzysztof Kluger1, Roland Pawliczek2
1Department of Mechanics and Machine Design, Opole University of Technology, 45-271 Opole, Poland.
Abstract:
The paper reports on the results of a comparison involving mathematical models applied for fatigue life calculations where the mean load value is taken into account. Several models based on the critical plane approach and energy density parameter were tested and analyzed. A fatigue test results for three types of materials are presented in this paper. The specimens were subjected to bending, torsion and a combination of bending with torsion with mean value of the load. Analysis of the calculation results show that the best fatigue life estimations are obtained by using models that are sensitive to the changes of material behavior under fatigue loading in relation to the specified number of cycles of the load.
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