Numerical Simulation of Failure Behavior Under Impact Loading for Cylindrical Carbon Fiber Reinforced Polymer

摘要

This study presents a prediction for the dynamic failure behavior of the carbonfiber reinforced polymer (CFRP) under impact loading. In the experiment, the splitHopkinson pressure bar (SHPB) test was conducted by using two types of cylindricalCFRP specimens. The commercial finite element analysis (FEA) software Abaquswas used for the analysis. In this study, we considered two types of failuremechanisms, a problem that mainly involves matrix-dominated failure and does notinvolve fiber breakage and a problem that involves fiber-dominated failure. To predictthe matrix-dominated failure, we adopted multi-scale analysis, which is a method thatcan carry out analysis at different scales. We considered the damage initiation criterionbased on continuum damage mechanics (CDM). This damage initiation criterion wasbased on the Christensen failure criterion. We simulated interfacial failure by usingcohesive zone modeling (CZM), which considers failure conditions in mixed mode. Inmicro-scale analysis, a two-dimensional periodic unit cell (PUC) was used and weconsidered CDM and CZM. Macro-scale analysis was conducted in the same way asin the SHPB experiments. To predict the fiber-dominated failure, simulation wascarried out using the Hashin damage theory. Parameters used in macro-scale analysiswere obtained from micro-scale analysis. Macro-scale analysis is currently conducted.