金属单搭胶接加强板接头力学性能分析

Research of mechanical properties of adhesive bonding of single lap joints with reinforcements

关键词:  金属单搭胶接  加强板  一维梁理论模型  力学性能

Key words:  adhesive single lap  reinforcements  one-dimensional beam theory model  mechanical properties

摘要:

为研究金属单搭胶接加强板接头的力学性能，文中先后对铝合金5052单搭胶接（简称AA）接头、铝合金5052单搭胶接加强板（AAT）接头进行静力学测试和疲劳性能测试，引入正态分布和威布尔分布对试验数据进行分析检验其有效性，并采用扫描电子显微镜对疲劳失效胶层进行微观分析.结果表明，AA接头和AAT接头的疲劳试验数据具有较好的规律性，与AA接头相比，AAT接头拉伸-剪切强度提高3.8%，端部弯曲度降低38.5%，能量吸收量提高60.2%，疲劳强度提高33.3%.

Abstract:

In order to enhance the mechanical properties of adhesive bonding of single lap joints (SLJs), the adhesive bonding of SLJs with reinforcements was designed based on Goland and Reissner's one-dimensional beam theory model. The adhesive bonding of SLJs whose adherends were aluminum alloy 5052 (AA joints), Al5052 with reinforcement (AAT joints) were separately tested under tension-shear loading and fatigue load, and the effectiveness of experimental data was analyzed by Normal distribution and Weibull distribution. The results show that the mechanical properties of joints are influenced by the stiffness at the end of the overlap region. The static strength of AAT joints increased by 3.8%. The energy absorption capacity of AAT joints increased by 60.2%. The deformation of AAT joints reduced by 38.5%. The fatigue properties of AAT joints increased by 30.3%.