抄録
In this paper, the fracture behavior of biomorphic C/SiC composites made from pine and radiata pine preforms was studied. The minimum repeating blocks of the biomorphic composites were defined as unit cells and modeled by finite elements. The periodic boundary conditions were applied at the unit cell boundary to simulate the macroscopic material behavior. The cohesive zone model approach was employed to predict the microscopic failure progression in the unit cells. The crack initiation and propagation behavior was investigated for the pine and radiata pine composite unit cells by simulating uniaxial tensile and compressive test conditions. The stress-strain curves were obtained and the fracture strengths were predicted. The effects of analysis model size and the variation of the microstructural arrangement on the predicted strengths and fracture shapes were examined.
