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考虑细观状态下纤维与基体的基本特性,采用文的基本假定和分析方法,本文计算了玻璃/环氧实心纤维及空心纤维单向板在宏观荷截下的破坏曲面.一般来讲,单向板纵向受拉时主要是由纤维承受截荷,此外,环氧树脂基体具有不等的拉压弹性极限.因此,本文考虑不同应力状态下应采用不同的极限强度值进行细观校核,认为受纵向拉伸截荷时考虑纤维的破坏;而受纵向压缩截荷时考虑基体的压缩破坏;受横向拉压截荷时考虑基体的拉压破坏.由此计算得到了实心纤维与空心纤维单向板在纤维体积含量不同时破坏曲线的变化趋势.
Considering the basic properties of fiber and matrix in the microscopic view, this paper calculates the failure surface of the glass / epoxy solid fiber and the hollow fiber unidirectional plate under the macro load by using the basic assumptions and analysis methods of the paper. Generally speaking, Longitudinal tension to the board is mainly due to the fiber to withstand the load, in addition, the epoxy matrix has a range of tension and compression elastic limit.Therefore, in this paper, different stress conditions should be considered under different ultimate strength value of the micro- It is considered that the failure of the fiber is considered by the longitudinal tensile load, while the compression failure of the matrix is considered by the longitudinal compressive load, and the tension and compression damage of the substrate is taken into account by the lateral tensile load.According to the calculation, One-way plate in the fiber volume content of different damage curve trend.