The effect of constant loading on the mechanical behavior of bulk adhesive

Abstract

The aim of this research was to develop an experimental-numerical approach to characterize the effect of constant loading coupled with elevated temperature on epoxy bulk adhesive and predict the stress degradation of bulk adhesive specimen under 15% and 25% tensile failure load for automotive industry. A power-law creep model was built to simulate the effect of temperature and loading on adhesive mechanical behavior, and the related strength degradation simulation has also been implemented using a creep strain dependent ductile damage model. Experiments were conducted on bulk adhesive specimens under constant temperature coupled with mechanical load and the corresponding experimental results provided creep parameters for the simulation procedure as well as effective validation with the numerical results in this study. The results obtained from experiments and numerical simulations were also in good agreement.