Abstract: Based on the three parameters standard linear solid model and the correspondence principle, the residual thermal stress of the syntactic plastic foams with coating micro-sphere caused by the change of temperature are determined. The effects of coating thickness, volume fraction of coating micro-sphere and time etc. on the residual thermal stress of material are investigated at the same time. The results show that the residual thermal stress in the material induced by the change of temperature decreases gradually with the increase of time, and the decrease of coating thickness as well as the volume fraction of coating micro-sphere can make the residual thermal stress increase. Furthermore, the thermal stress in the micro-sphere increases gradually along the direction of the radial increase, but in the coating and matrix it decreases gradually. At the interface of coating and micro-sphere, the thermal stress gets the maximum.

Key words: syntactic foam, residual thermal stress, visco-elastic behavior, thermal expansion coefficient, coating