本文聚焦于湿热环境对复合材料T型接头极限承载性能的影响规律，开展了考虑湿热环境前、后T型接头的极限承载能力试验研究。试验结果表明：相较于未经历湿热环境的试样，经历湿热环境后试样的初始刚度由190.1 N/mm上升至208.2 N/mm，提升了9.5%；极限抗弯承载力由3387 N上升至3544 N，提升了4.6%。T型接头的失效模式表现出高度一致性，考虑湿热环境前、后试样均以蒙皮-芯材脱粘为主导失效形式，并伴随局部蒙皮压缩破坏和芯材断裂；短期湿热环境虽然改变了T型接头的刚度特性，但并未诱发新的失效模式。经历湿热环境后T型接头刚度提升为固化工艺参数的优化提供了有价值的参考指标，同时也为全面评估不同材料体系的工艺稳定性和性能稳定性奠定了基础。
This study focuses on the influence of a hygrothermal environment on the ultimate bearing performance of composite T-joints, conducting experimental research on the ultimate bearing capacity of T-joints both before and after exposure to the hygrothermal environment. The test results indicate that: compared to specimens not subjected to the hygrothermal environment, the initial stiffness of specimens after hygrothermal exposure increased from 190.1 N/mm to 208.2 N/mm, representing an increase of approximately 9.5%; the ultimate bending bearing capacity increased from 3387 N to 3544 N, representing an increase of approximately 4.6%. The failure modes of the T-joints exhibited high consistency; both specimens tested before and after hygrothermal exposure experienced failure primarily dominated by skin-core debonding, accompanied by localized skin compression failure and core fracture. Although the short-term hygrothermal environment altered the stiffness characteristics of the T-joints, it did not induce any new failure modes. The observed increase in stiffness of the T-joints following hygrothermal exposure provides a valuable reference indicator for optimizing curing process parameters, while also establishing a foundation for comprehensively evaluating the process stability and performance stability of different material systems.
2026,48(7): 8-12 收稿日期：2025-7-1
DOI：10.3404/j.issn.1672-7649.2026.07.002
分类号：U663.9
基金项目：国家重点研发计划资助项目（2022YFB4300104）
作者简介：牛中原(1988-)男,硕士,工程师,研究方向为船舶复合材料结构优化设计
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