Modification of Zenner and Liu Criterion due to Non-Proportionality of Fatigue Load by Means of MCE Approach

Abstract:

The results of experimental verification of Zenner and Lius criterion confirm its efficiency in the case of estimation of fatigue life for proportional loading. Due to application of general damage parameter, the criterion is useful in case of various types of proportional loading and for multiple materials. However, for non-proportional loadings, of high non-proportionality level, the error of estimation of fatigue lives often exceeds scatter band 3. The hereby work presents a proposal for Zenner and Lius criterion modification based upon introduction of loading non-proportionality measure with minimum circumscribed ellipse method (MCE).

• Periodical: Key Engineering Materials (Volume 598)
• Pages: 201-206
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.598.201
• Online since: January 2014
• Authors: Łukasz Pejkowski*, Dariusz Skibicki
• Keywords: Fatigue Criteria, Fatigue Life Estimation, Multiaxial Fatigue, Non-Proportional Loading

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