摘要
采用在时间域内迭归算法为基础的混合有限元法分析了具有各种温度边界条件下复合材料层合板非线性热传导问题。在分析中考虑了材料热物理性质随温度变化的因素。为了提高瞬态温度场数值分析精度和改善数值计算稳定性，提出了一种新的离散原则，其中包括增量时间步长和有限元离散网格尺寸的选择以及它们之间的优化匹配原则。以［０°／９０°］ｓ碳／环氧Ｔ３００／５２２２为例，给出了数值分析结果。数值结果表明，在复合材料及其结构分析和设计中，必须考虑材料热物理性质随温度的变化。
This paper investigates nonlinear transient heat conductive problem of composite laminates under various types of heat conductive boundary conditions by using a mixed finite element method based on the recursive algorithm in the time dimension. The temperature-dependent thermo-physical properties are considered. A new discrete principle, which includes the magnitude of the incremental time step, the size of discrete element mesh and their optimum matching rule, is successfully employed to improve the accuracy and stability for the numerical analysis of the transient temperature field. Some numerical results are presented for a [0°/90°]s graphite/epoxy T300/5222 composite laminates. Certain conclusions have been drawn from the results.
出处
《大连理工大学学报》
EI
CAS
CSCD
北大核心
1992年第5期526-530,共5页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目
关键词
稳定性
复合材料
瞬态
温度场
stability
composite materials
temperature correlation
temperature transient
