Physical and chemical performance of heterogeneous material part exceeds homogeneous material part. Because of material distributing complexity and insufficient study for heterogeneous material, there are lots of difficult in analysis of heterogeneous material part. Theory of composite performance and ADINA-T module of finite element analysis software ADINA were used to compute and analyze temperature field and heat dissipating capacity for heterogeneous material and common piston, using the gradient aluminum matrix composite piston reinforced by ceramic fibers and aluminum matrix composite piston reinforced by ceramic fibers (no grads) as examples. The results show this method can change piston temperature distribution, reduce heat dissipation capacity and relax the stress at interface of gradient aluminum matrix composite layer reinforced by ceramic fibers and piston noumenon which caused by mismatch between different coefficients of thermal expansion, using gradient aluminum matrix composite layer reinforced by ceramic fibers.
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