本文基于弹塑性分叉理论研究单向纤维增强复合材料的压缩破坏模式和压缩强度对缺陷的敏感性问题。对于常见复合材料,所得结论是:无缺陷或者小缺陷情况的破坏模式为倾斜破坏带;大缺陷情况的破坏模式为水平破坏带;形成水平破坏带的压力值小于形成倾斜破坏带的压力。 Based on the elasto-plastic fork theory, this paper studies the compression failure mode and compressive strength of unidirectional fiber reinforced composites. For common composite materials, the conclusions are: the failure mode with no defects or minor defects is the slope failure zone; the failure mode with large defects is the horizontal failure zone; the pressure value that forms the horizontal failure zone is less than the pressure that forms the inclined failure zone.