A Method for Predicting the Impact Limit Speed of Composite Laminates Under Different Ambient Temperatures Based on the Three-Dimensional Hashin Criterion
摘要
A dynamic constitutive model of fiber-reinforced resin matrix composites considering temperature effect was proposed. It was used to predict the impact limit speed of composite laminates. High-speed bullet impact tests of fiber-reinforced resin matrix composite laminates were carried out at 25, 160, and 200°C, and the impact limit speed Vc was calculated using the test results. The test results showed that Vc of carbon-fiber-reinforced resin matrix composite laminates decreased with increasing ambient temperature. On this basis, a dynamic failure model of fiber-reinforced resin matrix composites was established considering the influence of ambient temperature. A VUMAT user subroutine was also developed to embed the failure model into the finite-element analysis software package. Then, the high-speed impacts of composite laminates at different temperatures were simulated numerically. The magnitude of Vc was predicted by the bisection method. A comparison of simulation results with test data showed that the error was smaller than 5%.