Damage Mechanics-Finite Element Full-Couple Method to Predict the Fatigue Life of Metallic Material

Abstract:

A damage accumulation model is presented for fatigue life prediction of metallic structures. Based on the energy theory and material fatigue test data, the plastic strain threshold for damage initiation was modified for HCF and LCF respectively. The damage evolution parameters were determined according to the fatigue test results of standard specimens. A damage mechanics-finite element full-couple method was adopted to simulate the process of fatigue damage evolution, incorporating elastic modulus reduction due to fatigue damage. Comparisons are made with the fatigue tests of 2A12-T4 open-hole plates and good agreement was obtained.

• Periodical: Applied Mechanics and Materials (Volume 707)
• Pages: 390-396
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.707.390
• Online since: December 2014
• Authors: Xian Min Chen*, Di Guan, Feng Ping Yang
• Keywords: Continuum Damage Mechanics, Fatigue Life Prediction, Finite Element, Numerical Simulation

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