In this paper Based on the strain energy Concept a Fcilure Criterion for Composites Materials, is derived The presented criterion have clear physieal Concept and good agreement with Tsai-Hill arid Tsai-Wu Theory of strength for Anisotropic Materials.

• 本文从线弹性理论中比应变能的概念出发,推导出了一个描述复合材料在复杂应力状态下的强度准则,它与Tsai-Hill及Tsai-Wu强度理论在平面应力状态时的结果一致。 本文提出的复合材料强度失效判据,在理论上有明确的依据,在应用上与传统的强度理论相同。