热障涂层系统热冲击裂纹扩展规律分析  

Analysis of Crack Growth Law of Thermal Barrier Coatings System under Thermal Shock

作　　者：张艳艳 丰世林 周斌 张泽辉 谢曦 ZHANG Yan-yan;FENG Shi-lin;ZHOU Bin;ZHANG Ze-hui;XIE Xi(Civil Aviation Flight University of China,Guanghan 618000,China)

机构地区：[1]中国民用航空工程学院,四川广汉618000

出　　处：《航空计算技术》2024年第3期126-129,共4页Aeronautical Computing Technique

基　　金：国家自然科学基金项目资助(52305170);四川省科学基金项目资助(2023ZYD0135,2022NSFSC1885);中央高校基本科研业务费项目资助(J2023-005;24CAFUC03031)。

摘　　要：为了深入理解热障涂层材料的热断裂行为,对热障涂层材料热冲击裂纹扩展问题进行了研究。利用瞬态相互作用积分方法提取了热障涂层材料裂纹尖端的瞬态热应力强度因子,同时基于裂纹扩展准则结合材料的断裂韧性和提取的瞬态热应力强度因子,分析了多界面热障涂层材料热冲击裂纹的扩展规律,进一步可以确定热冲击裂纹扩展的重要临界,如预制裂纹的开裂时刻、最终裂纹长度和最终裂纹扩展时间。研究结果表明,方法可以获得热冲击裂纹扩展过程中的重要临界参量,为分析热冲击裂纹扩展规律奠定基础。In order to further understand the thermal fracture problem of thermal barrier coating materials,the crack growth behavior under thermal shock load is studied.The transient thermal stress intensity factors(TSIFs)are obtained using the transient interaction energy integral method(IEIM).The crack growth law is evaluated using a mixed way.Combining the criterion for crack propagation with the fracture toughness and the transient TSIFs that are already obtained,the crack growth law of the thermal shock crack for multiple interface thermal barrier coating materials is analyzed in this way.Further determine the important critical points for thermal shock crack propagation,such as the cracking time,final crack length,and crack stopping time of prefabricated cracks.Thus the significant critical parameters can be validated.This method presents a solution to the fundamental problem of simulating thermal shock crack propagation.

关 键 词：热障涂层材料 相互作用积分 瞬态热应力强度因子 裂纹扩展规律 

分 类 号：O242[理学—计算数学]