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本文采用有限元法，建立了有关的单胞模型和相关的边界条件．着重研究了单向不连续碳纤维增强聚醚醚酮复合材料的细观弹塑性应力应变关系，分析了纤维端都的不连续性对复合材料中纤维与纤维，纤维与周围基体相互作用以及应力场变化的影响．此外利用体积平均法预测了在外载荷作用下单向不连续碳纤维增强复合材料的弹塑性应力-应变关系．
In this paper, the finite element method is used to establish the related cell model and the related boundary conditions. The mesoscopic elasto-plastic stress-strain relationship of unidirectional discontinuous carbon fiber reinforced polyetheretherketone composites was studied. The discontinuities of fibers at the fiber end were analyzed. The interaction between fiber and fiber, fiber and surrounding matrix and the stress field The impact of change. In addition, the elasto-plastic stress-strain relationship of unidirectional discontinuous carbon fiber reinforced composites under external load was predicted by the volume average method.