Abstract
The generation mechanism of residual stress in thermosetting resin by the curing shrinkage as well as the thermal shrinkage during curing process was studied in this paper. First,4-element thermoviscoelastic model, which can express the thermoviscoelastic behavior in the curing process of thermosetting resin was proposed. Second, the three-layer type laminate is assumed and the residual stress generated when this laminate is casted was analyzed. As results, it was turned out that the residual stress by curing shrinkage dose not generate when curing temperature is higher than the glass transition temperature of casting resin, but it generates when curing temperature is lower than the glass transition temperature of casting resin. And it is possible to make residual stress zero by controlling curing temperature, which becomes higher than the glass transition temperature by curing.
