在结构设计中常用熟知的准则σ≤[σ],然而,在结构中最大应力仅影响很小的区域,这区域与所用材料中的最弱点不总重合,先进复合材料的强度特征是具有线弹性性能和有较大分散性,所以,惯用的准则不能很好满足设计要求。作者从统计学观点讨论了这个问题。本文共叙述了四个部份:强度分散性、串联模型、并联模型以及简单的结构应用。 However, the maximum stress in the structure affects only a very small area, which does not always coincide with the weakest point in the material used. The strength characteristics of the advanced composite material are those with a line Flexible performance and greater dispersion, therefore, the usual guidelines can not well meet the design requirements. The author discusses this issue from a statistical point of view. In this paper, four parts are described: intensity dispersion, series model, parallel model and simple structure application.