PREDICTION, BY A GENETIC ALGORITHM, OF THE EFFECT OF HEAT STRESS ON THE TRANSVERSE DAMAGE OF FIBER-MATRIX INTERFACE OF HYBRID COMPOSITE MATERIAL (GLASS-CARBON/EPOXY)

摘要

In this paper, we have developed a genetic model to evaluate the influence of thermal stress on the transverse damage of the fiber-matrix interface hybrid composite material Glass_carbon/Epoxy. This genetic approach is based on the Cox equation and the probabilistic models of Weibull: damage of the fiber and damage of the matrix. The model takes into account the effects of temperature that result in the gradual deterioration of the fiber-matrix interface. This study has shown the influence of heat stress beyond a critical threshold of transverse damage to the interface, and also showed that damage to the interface of the carbon/epoxy composite material is greater compared with that of the hybrid composite glass_carbon/Epoxy under the effect of the same thermal stress. Our simulation results are in good agreement with the experimental results conducted by Vascon-celos et al. (2001). Therefore, our findings revealed that the model worked well with the phenomenon of damage to unidirectional composite and hybrid composite materials.