Prediction of Mechanical Properties Using Multi-scale Approach for Plain Woven SiC/SiC Composites
Based on the multi-scale characteristics and the periodicity of microstructure of plain woven SiC/SiC composites,the unit cell models of microscale(fiber-scale)and mesoscale(yarn-scale)are established.The mechanical properties parameters of the microscale model were calculated by Abaqus software,which were then introduced into the yarn-scale model.The corresponding UMAT subroutine was written to judge the damage initiation and damage evolution process of the material.The damage evolution and failure process of plain woven SiC/SiC composites under uniaxial tension were simulated.The results show that the X-direction tensile stress-strain curve is in good agreement with the experimental curve.The strength properties and damage evolution of plain woven SiC/SiC composites are predicted.
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