应用数学和力学2013，Vol.34Issue(7)：742-749,8.DOI:10.3879/j.issn.1000-0887.2013.07.009
轻质热防护系统多层材料组合结构的热应力分析
Numerical Analysis on Thermal Stress of Multilayer Materials Combined Structures for a Lightweight Thermal Protection System
摘要
Abstract
A design concept of using multilayer structure for the top face-sheet of a lightweight thermal protection system was proposed.To obtain the different structural performances,three schemes were considered according to the different stacking orders of two kinds of insulation materials.With the mechanical and thermal loads during aircraft reentry considered,internal thermal stress of the multilayer structure was simulated.Details of shear stresses,temperature of the bottom surface and y-direction displacement were obtained.The results show that the shear stresses occur at the edge area,and the distributions are anti-symmetrical along the midline.The usage of the materials with high thermal conductivity and heat capacity can reduce the temperature gradient and then the thermal stresses and deformation.With the uniform temperature field,the difference of the thermal expansion coefficients of two materials is positively related with the shear stress between the two materials.It is suggested that,there is a great potential of optimization design for the multilayer structure through different combinations of materials in different stacking orders.关键词
热防护/多层结构/铺层次序/材料组合/热应力Key words
thermal protection/ multilayer insulation structure/ stacking order/ material combination/ thermal stress分类
航空航天引用本文复制引用
王琪,吉庭武,肖曼玉,谢公南..轻质热防护系统多层材料组合结构的热应力分析[J].应用数学和力学,2013,34(7):742-749,8.基金项目
国家自然科学基金资助项目(11202164) （11202164）
教育部高等学校博士学科点专项科研基金资助项目(20116102120021) （20116102120021）
