Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser  

作　　者：SiNing Pan Gang Yu XiuLi He ShaoXia Li Ru Chen 

机构地区：[1]Institute of Mechanics, Chinese Academy of Sciences [2]School of Engineering Science, University of Chinese Academy of Sciences

出　　处：《Science China(Physics,Mechanics & Astronomy)》2018年第10期88-91,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.11272316,11502269,11672304,and 11272317);the Instrument-Developing Project of the Chinese Academy of Sciences(Grant No.yz201636)

摘　　要：Thermal fatigue is the typical failure mode of high-temperature combustion chamber components used in power plants and in the aerospace and transportation industries [1-3]. With growing demand for good performance and high reliability, thermal fatigue is becoming a serious problem. The thermal working conditions of combustion chamber components include start-stop cycles and routine working cycles simultaneously [4,5]. The former refer to large temperature changes, with the amplitude of 200℃-500℃ and time period of several hundred seconds that are responsible for low-cycle fatigue （LCF） damage. The latter correspond to low temperature amplitudes of 20℃-60℃, with time period of milliseconds, and are responsible for high-cycle fatigue （HCF） damages.Thermal fatigue is the typical failure mode of high-temperature combustion chamber components used in power plants and in the aerospace and transportation industries[1-3].With growing demand for good performance and high reliability,thermal fatigue is becoming a serious problem.The thermal working conditions of combustion chamber components include start-stop cycles and routine

关 键 词：疲劳行为 振幅 试验性 工作周期 可变 光导 学习 交通工业 

分 类 号：O346.2[理学—固体力学]