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1.引言混杂复合材料(hybrid composites)是由两种或多种纤维和一种或多种基体组合而成的材料.混杂得当,可以大幅度提高复合材料的性能,譬如减轻重量、降低造价、改善抗冲击性能、提高断裂韧度和降低缺口敏感性等,以适应日益增多的工程目的的要求.混杂复合材料的研究,正在成为一个瞩目的新动向.用网络理论来分析纤维缠绕结构是简易而有效的.迄今,网络理论的已有成果都是针对单一纤维缠绕结构的.因此,有必要建立混杂纤维缠绕结构分析的网络理论.与单一纤维网状微元不同,混杂纤维网状微元是静不定的,分析时必须涉及几何问题.现行网络理论的一个缺陷是未提供处理几何问题的正确方法.文献[1]指出,均衡
1. Introduction Hybrid composites consist of a combination of two or more fibers and one or more substrates that, when properly mixed, can greatly improve the composite’s properties such as weight reduction, cost reduction, Improve the impact resistance, improve the fracture toughness and reduce the gap sensitivity, in order to meet the increasing requirements of engineering purposes.Hybrid composite research is becoming a new trend of attention.With the network theory to analyze the fiber winding structure is simple And so far, the existing results of the network theory are all aimed at a single fiber winding structure.Therefore, it is necessary to establish the network theory of the hybrid fiber winding structure analysis.Compared with the single fiber mesh microelements, the hybrid fiber mesh microelements Is indeterminate, the analysis must involve geometric problems.A flaw of the current network theory is that it does not provide the correct method to deal with the geometric problems.References [1] pointed out that the equilibrium