利用MTS材料试验机和自制的低温实验装置,研究了玻璃布-环氧层板(GFRP)在0℃、-30℃低温环境下的动态断裂性能.采用WEK断裂模型来预测低温环境下GFRP材料的动态断裂韧性,给出了具体的实验测试步骤和理论分析方法,同时测定了单边切口试样拉伸情况下的断裂功.和WEK模型计算值进行比较,这两种方法都反映出温度和加载速率的改变对玻璃布-环氧层板材料的断裂性能有明显的影响.在低温环境下,当应变速率提高时,断裂韧性明显增大;和室温情形相比,在低温环境下GFRP材料的断裂韧性增大.“,”We conducted tests to determine fracture toughness of glass-cloth/epoxy laminate for three different temperatures (-30℃, 0℃ and 20℃) and two strain rates (10 -5 /s and 1/s). To our best knowledge, these tests were done for the first time in China. We selected WEK fracture model, then determined and listed in Table 1 values of its two parameters for glass-cloth/epoxy laminate: tensile strength and characteristic length. Finally we listed values of fracture toughness in Table 1. We also measured values o...