Effect of cell form on residual stress of SiC-reinforced GH4738 composites

In this paper, the residual stress of SiC-reinforced GH4738 composites processed by hot isostatic pressing was studied using the finite element method. First, the unit cells with different fibers and uniform fiber content were constructed using Abaqus. Then, the pressure and temperature conditions were considered, and hot isostatic pressing process was simulated. The residual stresses of different unit cells were obtained, and the effect of the cell form on the residual stress of the SiC-reinforced GH4738 composites was analyzed. Finally, the maximum residual stresses of different unit cells were compared, and the effects of the simulation methods and models were discussed. The results show that different cell types have little effect on the maximum residual stress with the maximum deviation of approximately 20%, and the differences between most cells of less than 5%. The cell stress distributions in different forms are affected by the distribution of the fibers, and the maximum residual stress appears at the interface between the fiber and the matrix.