Damage modeling of carbon-fiber reinforced polymer composite pin-joints at extreme temperatures

摘要

A novel finite element based framework was developed to study the effect of extreme temperatures on damage progression in carbon-fiber reinforced composite pin-joints. A progressive damage method that incorporated Hashin-type damage criteria was implemented in the model. Temperature dependent material properties were used to create three material models with properties corresponding to ambient temperatures -55℃, 20 ℃ and 82 ℃. At -55℃ ambient temperature, joint strength was reduced 8.6% as the relaxation temperature was varied from 20 ℃ to 100 ℃. At 82 ℃ ambient temperature, joint strength was reduced 3.6% as the relaxation temperature was varied from 20℃ to 100℃. The model showed that increasing the relaxation temperature decreased the joint strength and increased the matrix tensile damage rate but did not greatly affect other failure modes.