湿环境和预紧力作用对CFRP单搭接连接结构拉伸性能的影响

Tensile Behavior of CFRP Single-Lap Bolted Joint Under Combined Effects of Moisture Absorption and Preload

本文研究了湿环境和预紧力对碳纤维增强复合材料单搭接螺栓连接结构拉伸性能的影响。通过吸湿试验、拉伸试验和有限元仿真,得到了以下主要结论:(1)施加预紧力对复合材料螺栓连接件的吸湿影响较小。(2)在预紧力从0 k N到2 kN的范围内,干态和吸湿试件的结构强度均随预紧力增大而增大。(3)湿环境对结构应力分布影响较小。研究结果可为复合材料螺栓连接结构在湿环境中的应用提供支持。

The tensile performance of carbon fiber reinforced polymer(CFRP) single-lap bolted joint under wet environment and preload conditions is studied in this paper.Through moisture absorption test,tensile test and finite element simulation,the main findings are:(1) The moisture absorption of CFRP bolted joints is not significantly affected by the preload level.(2) The structural strength of the joints increases with the preload level in both dry and wet states,within the range of 0 kN to 2 kN.(3) The stress distribution of the joints is not noticeably altered by the wet environment.The results of this study can provide guidance for the design and application of CFRP bolted joints in wet environment.