本文概述了研究复合材料在低温下断裂性质的重要性,介绍了自制的低温装置和测量系统,测量了三种复合材料在不同温度下的断裂韧度,并分析了复合材料的断裂机理。 This paper presents an overview of the importance of researching the fracture properties of composite materials at low temperatures. The homemade cryogenic devices and measuring systems are introduced. The fracture toughness of the three composites at different temperatures is measured and the fracture mechanism of the composites is analyzed.