单搭接结构胶接头连接效率的影响因素分析

发布时间：2018-08-09 10:28

【摘要】：对单搭接结构胶接头进行拉伸试验,同时建立其有限元模型进行仿真,对单搭接结构胶接头连接效率的影响因素、接头两端刚度的差异对接头连接效率的影响进行分析。结果表明:对于钢材与铝材之间的结构胶连接,随着母材材料屈服强度的增大,接头连接效率不断提高,但当母材屈服强度增加到一定值后,接头连接效率反而呈现下降的趋势;与钢材相比,接头连接效率对铝材屈服强度更为敏感。接头连接效率也随接头几何尺寸(母材厚度、接头搭接长度和搭接宽度)的增加而提高。而对于两端刚度不同的结构胶连接,接头连接效率随着其两端刚度差异的加大而降低,因此为提高接头的连接效率,应尽量选用屈服极限相近的母材。
[Abstract]:The tensile test of single-lap structural adhesive joint was carried out, and the finite element model was established to simulate it. The factors affecting the connection efficiency of single-lap structural adhesive joint and the influence of the stiffness difference between the two ends of the joint on the joint connection efficiency were analyzed. The results show that the connection efficiency increases with the increase of the yield strength of the base material, but when the yield strength of the base metal increases to a certain value, the bonding efficiency of the structural adhesive joint between steel and aluminum is improved continuously with the increase of the yield strength of the base metal. Compared with steel, the joint efficiency is more sensitive to the yield strength of aluminum. The connection efficiency also increases with the increase of geometric dimensions (base metal thickness, lap length and width). However, for structural adhesive connections with different stiffness at both ends, the joint connection efficiency decreases with the increase of stiffness difference between the two ends. Therefore, in order to improve the connection efficiency, the base metal with similar yield limit should be selected as far as possible.
【作者单位】：湖南大学汽车车身先进设计制造国家重点实验室;汽车噪声振动和安全技术国家重点实验室;
【基金】：国家国际科技合作计划(2014DFG71590) 湖南省自然科学基金(14JJ3055) 中国博士后科学基金(2014M552132) 广西科技计划重大专项(桂科重1348003-5) 国汽(北京)汽车轻量化联盟项目(20130303)资助
【分类号】：U463.82

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