机械连接作为目前主要的连接方式，须在连接件与被连接件表面开设孔洞，而含孔结构件的力学性能会发生一定程度的下降。为了研究不同宽径比的CFRP层合板在湿热环境下的拉伸性能，制备分别含1、2、3、4、5 mm直径的中心贯穿孔CFRP层合板，分析其在71 ℃、85%RH环境下的破坏形貌、应力-应变曲线以及强度退化情况。结果表明：室温干态（RTD）环境下的CFRP孔板在断裂时，断口平整，呈现脆性断裂的基本特征；高温湿态（ETW）环境下的CFRP孔板会出现层间分层以及纤维黏连断裂的现象，同时在拉伸过程中试样会出现延迟断裂的情况。RTD和ETW环境下试样拉伸强度均会随着孔径的增大而减小。为了对湿热环境下含孔层合板的拉伸性能进行预测，提出一种基于PSC准则的预测公式。

Mechanical connection, as the main connection method at present, holes shall be made on the surfaces of connectors and connected parts, and the mechanical properties of the structural parts containing holes will be decreased to a certain extent. In order to study the tensile properties of carbon fiber reinforced polymer (CFRP) laminates with different width-to-diameter ratios under humid-heat environments, CFRP laminates containing center penetration holes with diameters of 1, 2, 3, 4, 5 mm, respectively, were prepared, and their damage morphology, stress-strain curves, and strength degradation were analyzed at 71 ℃ and 85% RH. The results show that the CFRP laminates in the room temperature dry (RTD) environment have a flat fracture with the basic characteristics of brittle fracture; the CFRP laminates in the elevated temperature wet (ETW) environment have the phenomena of interlayer delamination and fiber adhesion fracture, and delayed fracture occurs in the tensile process of the test pieces; the tensile strengths of the test pieces in the RTD and ETW environments decrease with the increase of the pore diameters. The tensile strength of the specimens in both RTD and ETW environments decreases with increasing pore size. In order to predict the tensile properties of porous laminates under humid and hot environments, a prediction formula based on the PSC criterion is proposed.