Abstract:

 Local depression deformation after curing is observed in damping adhesive structures in vehicle body manufacturing. To solve this problem, sample tests and real car measurement were conducted and material properties of damping adhesive were tested, to reveal the formation mechanisms of curing deformation. Curing characteristics, expansion behaviors and viscoelasticity properties of commonly used damping adhesive were obtained from the experiments on the material properties of damping adhesive and a series of mechanical and thermal tests. The correlations between expansion behavior / viscoelasticity property and curing degree were investigated. The results show that modulus and expansion property of adhesive are two important factors to curing deformation. The conclusion guides material selection and structural design in vehicle body manufacturing.