摘要
依据三维四向编织复合材料的结构特点,建立了能真实反映其空间构型的"双纽线"单元体胞模型,并以此为基础,采用有限元方法对C／SiC三维四向编织复合材料的基本性能参数进行了数值模拟,获得了该材料在制备冷却阶段的热变形行为以及残余应力和残余应变的分布状况,同时获得了制备后室温条件下该材料的等效弹性模量与等效热膨胀系数值。
A lemniscates micro model is established according to the fabric of the three-dimensional and four-step braided composite. On the base of this model, the distribution of thermal stress and strain of the three-dimensional and four-step composite during the preparation process is analyzed by using FEM software. The effective elastic modulus and the effective thermal expansion coefficient of the three-dimensional and four-step composite at room temperature are simulated and compared with their analytic solution. These results provide an accurate simulation method and give reference to design, process and use this kind of composite.
出处
《航空材料学报》
EI
CAS
CSCD
2005年第1期30-35,共6页
Journal of Aeronautical Materials
基金
航空基础科学基金(03H53048)
关键词
三维四向编织
纤维复合材料
有限元模拟
等效弹性模量
单元体胞几何模型
Carbon fibers
Computer simulation
Finite element method
Mathematical models
Mechanical properties
Physical properties
Thermal expansion
Thermal stress
