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通过试验和理论研究了三维编织纤维增强树脂基复合材料(FRP)与钢板的单搭粘接性能。建立了三维编织复合材料和钢板的单搭粘接有限元模型,并基于内聚区模型和Hashin破坏准则来模拟胶接层及三维编织复合材料的破坏,分别从极限载荷、破坏位移和破坏模式三方面将计算结果与试验结果进行对比,验证了有限元模型的有效性。在此模型基础上,研究了胶层厚度、粘接长度对单搭粘接极限载荷和破坏位移的影响,并提出针对不同工况下的优化方案选择的建议。最后建立了一种新型连接结构,相比较于原有单搭接连接方式,其拉伸强度和弯曲强度均有了较大提升。
The bonding properties of three-dimensional braided fiber reinforced resin matrix composites (FRP) and steel sheets were studied experimentally and theoretically. A three-dimensional finite element model of three-dimensional braided composites and steel plates was established. Based on the cohesive zone model and the Hashin failure criterion, the damage of the adhesive layer and the three-dimensional braided composites was simulated. From the ultimate load, failure displacement and failure mode Three aspects of the calculation results and test results are compared, verify the validity of the finite element model. Based on this model, the effects of adhesive layer thickness and bonding length on the ultimate load and failure displacement of single-sided adhesive bonding are studied, and the suggestions for optimizing the scheme under different operating conditions are proposed. Finally, a new type of connection structure is established, which has greatly improved the tensile strength and bending strength compared with the single lap connection method.