摘要
采用三维弹塑性有限元分析方法，数值分析了胶焊接头中胶粘剂厚度和弹性模量对胶焊接头内应力分布的影响。给出了五种不同弹性模量和五种不同厚度胶粘剂下，胶焊接头中焊点边缘和搭接区边缘的应力分布曲线。结果表明：胶粘剂的弹性模量低和厚度大时，胶层中的剪应力小而焊点边缘处存在明显的应力集中；胶粘剂弹性模量增大和胶层厚度减小时，接头中焊点边缘处应力减小而胶层中剪应力增大。在一定条件下，胶焊接头中采用易变形的胶粘剂对提高胶焊接头的承载能力有利，可选择低弹性模量的胶粘剂和较厚的胶层厚度。
Three dimensional elastoplastic finite element analysis method (FEM) has been used to study the effect of elastic modulus and thickness of adhesives on the stress distribution in weldbonded joints. Stresses at the edges of the spot welds and the lap zones in weldbonded joints are given under the condition of five types of adhesives. The results show that, for weldbondes joints with low elastic modulus and/or thick adhesive layers, the shear stress in adhesive layers is small while there exists great stress concentration at the edge of the spot welds. With the increase of the elastic modulus and/or decrease of the adhesive thickness, the stresses at the edge of the spot welds decrease and the shear stress in adhesive layers increases. On certain conditions, a deformable and flexible adhesive may be favorable for improving the strength of weldbonded joints, hence, adhesives with low modulus and thicker adhesive layers are preferable.
出处
《材料工程》
EI
CAS
CSCD
北大核心
1998年第5期19-23,共5页
Journal of Materials Engineering
关键词
胶焊接头
应力分析
胶粘剂
厚度
弹性模量
weldbonded joints finite element method(FEM) stress analysis
