Measuring Thermal Deformation of CFRP in High-temperature Airflow Using Digital Image Correlation

Abstract

In this study, thermal deformation of Carbon Fiber Reinforced Plastic (CFRP) heated rapidly by JAXA/ISAS arc wind tunnel is measured by using digital image correlation. The specimen of CFRP is exposed to plasma flow. Then, the specimen is heated rapidly to approximately 2300°C. Stereo digital image correlation is used to measure in-plane and out-of-plane displacement of the specimen. Ceramic bond is applied on the specimen surface as high-temperature resistance random pattern. An infrared ray cut filter is used for cutting strong infrared radiation from the specimen. Reference images are updated to correlate rapid change of random pattern in deformed images. As the result, the expansive of CFRP by high-temperature airflow is observed by using digital image correlation.