材料特性对胶接接头应力分布和弯矩因子的有限元分析

Finite element analysis of stress distribution and moment factor of adhesive joints with material properties

采用二维有限元方法分析了金属胶接单搭接接头中5种胶粘剂对接头应力分布和弯矩因子的影响。胶粘剂为弹性模量不同的5种树脂,为了体现材料特性的显著差别,每种树脂的弹性模量彼此相差近10倍。弹性模量越大,胶层中剪应力的峰值、幅值越大。同时,弯矩因子也随胶层弹性模量的增大而显著提高。故选用弹性模量在千MPa数量级左右的胶粘剂,这样可以发挥胶粘剂的使用性能并提高接头的承载能力和稳定性。

The effect of the elastic modulus of five adhesives on stress distribution and bending moment factor in the metal single-joint joint is analyzed by two-dimensional finite element method. The adhesives are five kinds of resins with different elastic moduli. In order to reflect the significant difference between material properties,the elastic modulus of each resin differs by 10 times. The greater the modulus of elasticity,the larger the peak value and amplitude of the shear stress in the adhesive layer,while the bending moment factor increases significantly with the increase of elastic modulus. The adhesive with the elastic modulus of the order of magnitude of MPa is selected to exert the adhesive performance and improve the carrying capacity and stability of the joint.