Temperature-dependence of acoustic fatigue life for thermal protection structures  

作　　者：Yadong Zhou Shaoqing Wu Zhiyong Tan Qingguo Fei 

机构地区：[1]Department of Engineering Mechanics, Southeast University [2]Jiangsu Key Laboratory of Engineering Mechanics, Southeast University [3]State Key Laboratory of Space Physics

出　　处：《Theoretical & Applied Mechanics Letters》2014年第2期27-31,共5页力学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(10902024);the National Aerospace Science Foundation of China(20090869009);the New Century Excellent Talent in University(NCET-11-0086);the Research Fund for the Doctoral Program of Higher Education of China(20130092120039)

摘　　要：Acoustic fatigue life evaluation is essential for thermal protection struc- tures due to the severe thermo-acoustic load in service. A study on temperature- dependence of acoustic fatigue life for a C/SiC panel is presented in this paper. Effects of temperature on both the structural responses and the S-N curves are investigated. The Dirlik method is adopted to predict the fatigue life of a C/SiC panel at three different temperatures respectively. Significant differences are ob- served from the results of numerical simulations between the fatigue lives of the panel in the three cases. The temperature-dependence of acoustic fatigue life of a C/SiC panel is verified, and fatigue test of the material needs to be more atten- tively performed.Acoustic fatigue life evaluation is essential for thermal protection struc- tures due to the severe thermo-acoustic load in service. A study on temperature- dependence of acoustic fatigue life for a C/SiC panel is presented in this paper. Effects of temperature on both the structural responses and the S-N curves are investigated. The Dirlik method is adopted to predict the fatigue life of a C/SiC panel at three different temperatures respectively. Significant differences are ob- served from the results of numerical simulations between the fatigue lives of the panel in the three cases. The temperature-dependence of acoustic fatigue life of a C/SiC panel is verified, and fatigue test of the material needs to be more atten- tively performed.

关 键 词：C/SiC panel S-N curve acoustic fatigue TEMPERATURE-DEPENDENCE 

分 类 号：O346.2[理学—固体力学]