AN INFRARED LINE SCANNING TECHNIQUE FOR DETECTING DELAMINATIONS IN CARBON-FIBER TUBES

A thermal nondestructive testing method based on an infrared line scan ner for cylindrical specimens is presented, A seven-layered carbon-gla ss fibre tube with an artificial delamination was used as a test sampl e. A finite difference computational model of the heating of the tube was constructed in order to simulate the measurement and evaluate the capability of detecting delaminations. The numerical results show the temperature difference caused by the delamination to be well above the practical detection limit, which was verified by the actual measureme nts. (C) 1997 Elsevier Science Ltd.