Local out-of-plane deformation of CFRP ablator subjected to very rapid heating was investigated in this study. The local out-of-plane deformation is measured by three dimensional digital image correlation (3D-DIC) technique. The 3D-DIC at high temperature is achieved by high-temperature resistance random pattern on specimen surface using ceramic bond and blue filter intended for cutting strong infrared radiation from the specimen. Then discussed the mechanism of the local out-of-plane deformation only at the rapid heating condition, in terms of carbonization, pyrolysis gas occurrence, gas pressure storage and interlaminar debonding due to the gas pressure in this study.
