基于统计均匀化技术的多层结构界面脱粘热力耦合研究

项目名称： 基于统计均匀化技术的多层结构界面脱粘热力耦合研究

项目编号： No.11502207

项目类型： 青年科学基金项目

立项/批准年度： 2016

项目学科： 数理科学和化学

项目作者： 郑晓亚

作者单位： 西北工业大学

项目金额： 20万元

中文摘要： 热力耦合作用下，多层结构出现界面脱粘现象，重者直接造成灾难性事故，因此有必要进行多层结构界面脱粘热力耦合研究。而目前为止尚缺乏统一的界面热力学模型和有效的求解方法。本项目拟将Sista和Vemaganti提出的微凸峰接触模型从摩擦学研究扩展到传热学研究，建立统一的界面热力学模型；基于统计均匀化技术，将界面微观量与宏观量联系起来，建立高温接触热阻的本构关系；开展真空、中高压（5—25MPa）载荷以及高温（500℃—1500℃）环境下接触热阻的实验研究；构造等效的宏观模型，建立多层结构界面脱粘热力耦合问题有效的数值计算方法和可靠的计算平台。通过界面热力学行为的理论和实验研究，推动它走向工程实际应用，既具有重要的学术意义也具有工程应用价值。

中文关键词： 多层结构；热力耦合；界面脱粘；统计均匀化；接触热阻

英文摘要： Under the effect of thermo-mechanical interaction, interfacial debonding phenomena probably occur in multilayer structures and cause catastrophic accident directly in serious situation. Therefore, it is necessary to carry out the research of thermo-mechanical interaction of multilayer structures with interfacial debonding. And so far, it is lack of the integrated thermo-mechanical model and the effective solving method. Micro-asperity contact model presented by Sista and Vemaganti is extended to the field of heat transfer and the integrated thermo-mechanical constitutive model is constructed. Based on statistical homogenization techniques, the constitutive relations of thermal contact resistance under high temperature are derived and connected the interfacial micro parameters with macro parameters. Experimental research of thermal contact resistance are completed in vacuum environment and under high pressure from 5 to 25 MPa and high temperature from 500℃ to 1500℃. The equivalent macroscopic model is constructed. Then effective numerical method and reliable platform for solving thermo-mechanical interaction with interfacial debonding are studied. Through the theoretical and experimental research of interfacial thermo-mechanical behavior, it promotes spacecraft engineering and has significance value to academic research and engineering application.

英文关键词： multilayer structures ;thermo-mechanical interaction ;interfacial debonding ;statistical homogenization techniques;thermal contact resistance