Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : December 22, 2018 - December 24, 2018
Carbon fiber reinforced plastic composite (CFRP) exhibits very complex interactive failure mechanisms because it includes fiber–matrix interfaces and interlaminar interfaces. Modeling fibers, matrix and interfaces in detail is required to conduct progressive damage analysis of CFRP accurately, but the model becomes large scale. Therefore, we have developed finite element analysis (FEA) software that could simulate failure of large-scale CFRP models including interfaces, based on open-source large-scale parallel FEA program FrontISTR. We implemented cohesive element into FrontISTR to model interfaces. We evaluated mesh size effects on interfacial damage analysis simulating double cantilever beam (DCB) experiments for measuring interlaminar strength. We conducted the simulation with 5 different element sizes by using supercomputer system. The simulation results showed that the maximum test force converges to a certain value as the mesh size decreases. In addition, we found that the software could analyze progressive damage of large-scale model with more than 70 million degrees of freedom.
