Experimental Analysis of Low Cycle Fatigue Life for Cylindrical Specimens with Transverse Holes Under Out-of-Phase Multiaxial Loading

• Main Authors: Wei-Wei Wang, 王維偉
• Other Authors: Yi-Ming Jen
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/43272434911708991529

碩士 === 中華大學 === 機械與航太工程研究所 === 91 === The low cycle fatigue life for AISI 316 stainless steel cylindrical specimens with transverse holes under out-of-phase multiaxial loading was experimentally analyzed in the study. Finite element method was employed to calculate the stress/strain behavior at the notch roots. The numerical simulation results were used to predict the crack initiation locations and initiation life with assistance of four critical plane models. Those are Brown-Miller model, Lohr-Ellison model, Fatemi-Socie model, and Smith-Watson-Topper model. A numerical code was developed to find the critical plane in the strain space. The predicted results show that the Fatemi-Socie model predicts the crack initiation life under out-of-phase loading within the variation band of factor two because the model includes the stress parameter which can account for the additional hardening effect in the out-of-phase loading. Furthermore, the predicted crack initiation locations are close to those observed in the experiments.