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

Y. S. Upadhyaya; B. K. Sridhara

doi:10.1016/j.matdes.2011.09.049

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

Y. S. Upadhyaya, B. K. Sridhara

Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology, Manipal

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

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.

Original language	English
Pages (from-to)	220-224
Number of pages	5
Journal	Materials and Design
Volume	35
DOIs	https://doi.org/10.1016/j.matdes.2011.09.049
Publication status	Published - 01-03-2012

All Science Journal Classification (ASJC) codes

Mechanical Engineering
Mechanics of Materials
Materials Science(all)

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10.1016/j.matdes.2011.09.049

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