SFEM for p-S-N Curve of Notched Specimens and Test Application

doi:10.3901/JME.2018.10.117

Abstract

Abstract: The p-S-N curve is one of the most important basis of fatigue reliability analysis, and the test approach is the most reliable method to obtain p-S-N curve. Due to the long time, the variety of the notch form and other reasons, the p-S-N curve of notched specimens is often difficult to get by means of test. Calculating the fatigue life and fatigue strength is studied by using the stochastic finite element method(SFEM), but the parameters are often complex. Considering the p-S-N curve of smooth specimens and the notch geometry parameters, Dispersion of stress and strain caused by notch dispersion is combined with the p-S-N curve that indicate fatigue life dispersion by stochastic finite element method. The p-S-N curve of the notched specimens is obtained by Monte Carlo sampling, and is used for part of the study of fatigue reliability, experimental study on small load omitting. The experimental results show that the approach is feasible and can be used to fit the p-S-N curve of notched specimens.

Key words: p-S-N curve, field strength method, notched specimens, reliability, stochastic finite element method

CLC Number:

V215

JIN Jia, ZHANG Shuming, LI Wuyi, XUE Weijun. SFEM for p-S-N Curve of Notched Specimens and Test Application[J]. Journal of Mechanical Engineering, 2018, 54(10): 117-123.

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