Research on Fatigue Life of Autofrettaged Thick-Walled Cylinder in Probabilistic Fracture Mechanics

Abstract:

Based on the theory of probabilistic fracture mechanics and Monte Carlo simulation, reliability analysis method for fatigue life of autofrettaged thick-walled cylinder was given. The forms of fatigue cracks in bore of autofrettaged thick-walled cylinder were considered as semi-elliptical cracks. The autofrettage residual stress solution was suitable for the thick-walled cylinder made of steel with strain hardening and Bauschinger effect. The stress intensity factors of thick-walled cylinder were calculated according to weight function method. The analysis of the examples showed that lognormal distribution is the best fit for fatigue life. Finally, the fatigue life of autofrettaged thick-walled on the condition of different reliabilities and confidences were presented.

• Periodical: Applied Mechanics and Materials (Volumes 249-250)
• Pages: 36-39
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.249-250.36
• Online since: December 2012
• Authors: Ai Jun Chen, Zi Chu Cha, Zhi Qun Wang
• Keywords: Autofrettaged Thick-Walled Cylinder, Fatigue Life, Probabilistic Fracture Mechanics, Reliability Analysis

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