Fracture Mechanics of Adhesively Bonded Polymer Matrix Composites in Cryotank Environments

摘要

In this work, adhesively bonded joints with composite adherends are evaluated both experimentally and analytically in environments similar to those encountered in cryotanks. Adherends are of unidirectional graphite-BMI construction bonded with AF-191M film adhesive. Monotonic mode I adhesive fracture toughness tests are performed at near-liquid nitrogen temperature (-190°C), room temperature (27°C) and elevated temperatures (121°C, 117°C) to determine temperature effects on critical-strain energy release rate.