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本文主要进行了环氧及增韧环氧树脂的断裂韧性及裂纹快速扩展的试验研究。试验过程中采用了ＧＬＣ－１型高速裂纹扩展测试仪来测试裂纹的扩展速度，得到在裂纹扩展过程中裂纹扩展速度曲线。本文结合不同的计算公式及有限元分析方法，讨论了各个确定断裂韧性公式的准确程度，发现传统的静态断裂韧性的分析方法所得到的结果偏大，有一定的危险性，建议使用试验与数值计算相结合的方法；同时还发现增韧不仅可以提高材料的静态和动态断裂性能，而且在裂纹扩展过程中可以起到减缓裂纹扩展的作用
In this paper, the experimental research on the fracture toughness and rapid crack propagation of epoxy and toughening epoxy resin has been carried out. During the test, a GLC-1 high-speed crack propagation tester was used to test the crack propagation speed, and the crack propagation speed curve during the crack propagation was obtained. In this paper, different calculation formulas and finite element analysis methods are used to discuss the exactness of each formula for determining fracture toughness. It is found that the traditional static fracture toughness analysis results are too large and have some risks. It is suggested that the test and numerical values Calculation and combination of methods; also found that toughening can not only improve the static and dynamic fracture properties of materials, but also in the crack growth process can play a role in mitigation of crack propagation