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胶-螺混合连接结构的传力分析

LOAD TRANSFER ANALYSIS IN BONDED-BOLTED HYBRID JOINTS
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摘要 建立了胶-螺混合连接结构的有限元模型,并进行了传力分析研究。利用粘聚区模型模拟胶层的失效过程,并考虑了金属结构的塑性变形。同时,通过胶接、机械连接及胶-螺混合连接三种形式分别进行了方法的验证,试验结果和模拟结果吻合较好,证明了所采用的胶-螺混合连接分析方法的有效性。另外,分别建立了单钉和双钉胶-螺混合连接结构模型,分析发现相对于胶接结构,单钉混合连接结构的承载能力并不会有明显提高。同时发现两钉胶-螺混合连接中两螺栓外侧的胶层由于较大的面外力会很快发生破坏,而两螺栓内侧的胶层由于螺栓的法向作用使得其只受纯剪切力,从而提高了该区域胶层的承载能力。鉴于此对混合连接构型进行了改进设计,很好地提高了连接强度。 A finite element method of the hybrid (bonded/bohed) joints is developed, and load transfer is analyzed. The three-dimensional cohesive zone model is used to simulate adhesive layer. Elasto-plastic deformation of metal structure is taken into account. Meanwhile, experimental data of the bonded joints, the bolted joints and the bonded/bolted hybrid joints are obtained and compared with the predictions. A good agreement between experimental results and numerical predictions is observed. In addition, single bolt and double bolts hybrid (bonded/bolted) joints models are developed, and analysis shows that load-bearing capacity of single bolt hybrid isn' t improved, relative to bonded joint. Meanwhile, in the double bolts hybrid joints, adhesive layer outside of the bolts is destroyed soon, because of biggish peeling force. That inside of bolts is carried pure shear force due to normal constraint force of bolts, and it could enhance carrying capacity of the adhesive layer. So the parameters and forms of bonded-bolted hybrid joints are improved, as enhanced the joints strength.
作者 陈向明 柴亚南 袁菲 于飞 曹素 CHEN XiangMing1 CHAI YaNan2 YUAN Fei2 YU Fei2 CAO Su2(1. Aeronautics Science and Technology Key Laboratory of Full Scale Aircraft Structure and Fatigue, Aircraft Strength Research Institute of China, Xi' an 710065, China) (2. School of Aeronautics, Northwestern Polytechnical University, Xi' an 710072, China)
出处 《机械强度》 CSCD 北大核心 2017年第3期668-673,共6页 Journal of Mechanical Strength
关键词 胶-螺混合连接 内聚力模型 数值模拟 传力分析 Bonded-bolted hybrid joints Cohesive zone model Numerical simulation Load transfer analysis Configuration optimization
作者简介 陈向明,男,1983年12月生,宁夏固原人,汉族,中国飞机强度研究所工程师,西北工业大学在读博士;研究方向为复合材料结构强度技术。
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