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《Chinese Journal of Theoretical and Applied Mechanics》 2013-03
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A PREDICTION METHOD ON HIGH-CYCLE FATIGUE PARAMETERS BASED ON DISSIPATED ENERGY COMPUTATION

Li Yuan2) Han Xu Liu Jie Jiang Chao(State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,College of Mechanical and Vehicle Engineering,Hunan University,Changsha 410082,China)(Department of Traffic and Transportation Engineering,College of Basic Education for Commanding Officers,National University of Defense and Technology,Changsha 410073,China)  
A heat conduction equation under high-cycle fatigue loadings was established using sheet assumption within thermodynamic framework.Dissipated energy per cycle,correlated with fatigue damage,could be deduced from temperature field data of specimen and real-time load signal.Then,taking 316L stainless steel for example,the dissipation energy per cycle variations were in-situ monitored during each high-cycle fatigue test under different stress levels.Dissipated energy versus fatigue lifetime curve shows the same pattern as the traditional stress versus fatigue lifetime curve.A new energy method was developed to predict high-cycle fatigue limit.The high-cycle fatigue limit determined by dissipated energy measurement was close to the experimental fatigue limit.
【Fund】: 国家自然科学基金(51175160);; 装备预先研究(62501036012);; 国防科技大学预先研究(JC11-09-01)资助项目;; 国家留学基金委(CSC)的访问学者资助~~
【CateGory Index】: O346.2
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