Thermal stress on the interface between particulate and matrix of functionally gradient material

Aim To investigate the thermal stress for the interface of functionally gradient material (FGM). Methods Based on thermoelastic assumption, the design and structureptimization of functionally gradient material were fitst fulfilled by use of finite element method, and then the thermal stress on the matrix-particulate interface of the fabricated functionally gradient materials were calculated using double-layer-embedment model. Results The mutating stresses on the both sides of the matrix-particulate interface in the graded layer were obtained, and the stress and the volume fraction of materials in every graded layer were different. Conclusion The ultimate mutation of matrix-particulate interface stress causes the matrix-particulate interface crack to be initiated.