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- 2018
三维编织复合材料与金属胶接结构的力学性能及优化
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Abstract:
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）与钢板的单搭粘结性能。建立了三维编织复合材料和钢板的单搭粘结有限元模型，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、粘结长度对单搭粘结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 properties of single-lap adhesive joint of composite/metal plates were experimentally and theoretically studied. The finite element model of the single-lap adhesive bonded structures consisting of a three-dimensional braided composite plate and a steel plate was established. Based on cohesive zone model and Hashin failure criteria, the damages of the adhesive layer and braided composite were simulated. The results show that the critical load and failure displacement as well as the damage modes of the bonding structure are all in good agreement with the experimental results which verifies the validity of the numerical model. Based on this numerical model, the effects of the thickness and bonding length of the adhesive layer on the critical load and the failure displacement of the adhesive bonded structure were studied. Based on the obtained results, a new type of connection structure was proposed. It is demonstrated that this new connection structure remarkably improves the tensile and bending strengths compared with the original single-lap adhesive bonded structure. 国家自然科学青年基金（51603022）；国家自然科学基金重点项目（11632004）
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