INVESTIGATION OF THERMAL EXPANSION AND INTERNAL STRESS OF C/AI COMPOSITES

In the (x-y) plane,thermal expansion of aluminum-matrix composites reinforced by carbon fiber with orthogonal arrangement was measured. It was found that the thermal expansion of composites in the (x-y) plane was related to heat treatment. The heat stress is analyzed in this paper. It is proved that the thermal expansion difference is caused by the internal stress of the composites.