四川大学 空天科学与工程学院，成都 610065
发布日期:2019-12-11通讯作者:黄彦彦，讲师，电话(Tel.): 18080124635；E-mail: yyashelyhuang@gmail.com.作者简介:杨万友（1991-），男，博士生，主要从事空间摩擦学与可靠性工程、多场耦合磨损理论等方面的研究.基金资助:国家重点研发计划（2017YFB1300604）Numerical Simulation of Temperature Rise Distribution of Particle Reinforced Composites Under Thermal Loads
YANG Wanyou,WANG Jiaxu,HUANG Yanyan,ZHOU Qinghua,YANG YongSchool of Aeronautics and Astronautics, Sichuan University, Chengdu 610065, China
Published:2019-12-11摘要/Abstract
摘要： 对在严酷太空环境中服役的航天器而言，高低温交变是严重影响颗粒增强复合材料性能的关键因素之一.热载荷将造成材料表面和内部温升发生变化，进一步导致材料产生热变形和热应力，严重影响材料的力学性能.颗粒增强复合材料中，增强体具备与基体材料不一样的热传导属性，且分布不规则，使得热量在复合材料中的稳态热传导以及温升分布规律极其复杂.论文基于等效夹杂方法，提出一种求解分布热载荷作用下复合材料温升分布场的数值分析方法，并利用共轭梯度法和快速傅里叶变换法提升数值分析方法效率.分析结果表明，颗粒增强体形状、大小、位置和热传导属性对颗粒增强复合材料内部温升分布有着显著影响.
关键词: 热载荷； 颗粒增强复合材料； 稳态热传导； 数值模拟； 温升分布
Abstract: Alternation between high and low temperatures is one of the key factors that severely affect the performance of the particle reinforced composites applied on the spacecrafts serving in rigorous space environment. Thermal loads result in surface and subsurface temperature rise changes of the materials, further lead to the surface thermal deformation and the interior thermal stress, and severely influence the mechanical performance of the materials. In the particle reinforced composites, the reinforcement has the heat conduction properties which are inconsistant with the base material, and whose distribution is irregular. Thus, steady state heat conduction in composites and its temperature rise distribution become quite complicated. Based on the equivalent inclusion method, a numerical analysis method for solving the temperature rise distribution of the composites under thermal loads was proposed, and its efficiency was promoted by appling a conjugate gradient method (CGM) and fast Fourier transform (FFT) method. The results demonstrate that the shape, the size, the location and the heat conduction property of the particle reinforcements have a significant influence on the temperature rise distribution inside of the particle reinforced composites.
Key words: thermal loads; particle reinforced composite; steady state heat conduction; numerical simulation; temperature rise distribution
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