摘要
基于细观力学预测复合材料宏观弹性模量的两种方法,以单向复合材料为研究对象,从理论上推导了复合材料三维桥联模型公式,并利用CAE软件M sc.Patran/N astran建立了RVE模型,进行了有限元模拟计算。两种方法计算的结果与实验均有较好的一致性,表明两种方法都是能够较好计算单向复合材料的宏观弹性模量。
Aim. Engineers need calculation methods for predicting elastic moduli of unidirectional composites in order to reduce greatly the amount of testing otherwise needed. We present two methods of calculation. （1） the extension of Huang＇ semi-theoretical 2-D method to become a 3-D method; （2） engineering method, which is less accurate than the above-mentioned 3-D method but is more widely applicable. In the full paper, we explain in detail our two methods; in this abstract, we just add some pertinent remarks to listing the two topics of explanation： （A） semi-theoretical derivation of 3-D bridging model formulas; （B） finite element engineering model and calculation; under topic （A） we derive eqs. （19） through （23） in the full paper for calculating respectively the five independent elastic moduli, E11, v12, E22, G12, G23; under topic （B）, Figs. 1 and 2 in the full paper show the RVE（representative volume element） finite element model; also under topic （B）, we use software Msc. PATRAN/NASTRAN to simulate RVE model. Finally we give a numerical example, whose 3-D semi-theoretical calculation results and RVE simulation results are given in Table 2 in the full paper. Table 2 shows that the 3-D semitheoretical results are more accurate but the more widdly applicable RVE model simulation results are still sufficiently accurate for engineering applications.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2006年第6期787-790,共4页
Journal of Northwestern Polytechnical University
基金
航空科学基金(04B53012)资助
作者简介
吕毅（1981-），西北工业大学博士生，主要从事复合材料细观力学的研究。
