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利用横向裂纹拉伸试验模型（ＴｒａｎｓｖｅｒｓｅＣｒａｃｋＴｅｎｓｉｏｎ－ｔｅｎｓｉｏｎＴｅｓｔ），在３种湿热环境（室温、８５℃和８５℃／９５％ＲＨ）条件下，对２种单向碳纤维增强树脂基复合材料（Ｔ３００／ＱＹ８９１１和ＨＴＡ／６３７６）层合板的Ⅱ型分层特性进行了试验研究。结果表明湿热环境导致复合材料层间断裂韧性降低，引起Ⅱ型应变能释放率门槛值显著下降，裂纹扩展速率大大提高，温度的影响较湿度更为明显。利用电镜（ＳＥＭ）对试样分层表面进行了检测，湿度对断面特征无明显的影响。
The tensile properties of two kinds of unidirectional carbon fiber reinforced resin matrix composites (T300 / QY8911 and T300 / QY8911) were measured by using TransverseCrackTension-tensionTest under three hot and humid environments (room temperature, 85 ℃ and 85 ℃ / 95% RH) HTA / 6376) laminate Ⅱ type layering characteristics of the experimental study. The results show that the hot and humid environment leads to the decrease of interlaminar fracture toughness, which leads to the significant decrease of type Ⅱ strain energy release rate threshold and the increase of crack propagation rate. The influence of temperature is more obvious than that of humidity. The layered surface of the sample was examined by electron microscope (SEM), and the humidity had no obvious influence on the cross-sectional characteristics.