Fatigue life prediction: A Continuum Damage Mechanics and Fracture Mechanics approach

Upadhyaya, Y S and Sridhara, B K (2011) Fatigue life prediction: A Continuum Damage Mechanics and Fracture Mechanics approach. Materials and Design, 35. pp. 220-224. ISSN 0261-3069

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Abstract

Continuum Damage Mechanics (CDM) approach is used to predict crack initiation life and Fracture Mechanics approach predicts crack growth life. Strain controlled fatigue life of a ferrous alloy, EN 19 steel, has been determined using CDM and Fracture Mechanics approach. By combining these two approaches, life could be predicted with damage value in the material. All inputs required for the models have been determined by conducting monotonic, cyclic and fracture tests. Predicted life is also compared by conducting strain controlled fatigue tests. Predicted life in the strain amplitude range of 0.3–0.7% (fatigue life range of 102–105), compares well with the experimental results. All tests have been conducted at specimen level, stress ratio of �1 and at room temperature. The variation of crack initiation and crack propagation life with strain amplitude shows that maximum life is consumed by crack growth process at higher strain amplitude and at lower strain amplitudes, maximum life is spent for crack initiation process.

Item Type: Article
Additional Information: © 2011 Elsevier Ltd�
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 29 Sep 2012 09:18
Last Modified: 29 Sep 2012 09:18
URI: http://eprints.manipal.edu/id/eprint/77305

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