Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : October 08, 2016 - October 10, 2016
Carbon fiber reinforced polymer (CFRP) composites for an aircraft structure have resin-rich layer at the interlamina to prevent a delamination. Resin-rich layer is an electrical insulator, and it limits the contact regions of conductive carbon fibers. Electrical conductivity in the through-thickness direction of CFRP composites, therefore, is very low compared with that in the in-plane direction due to resin-rich layers. When an airplane made of CFRP composites is struck by a lightning, high electric current flows into the CFRP components, which has some influences on structural materials mechanically and electrically. In the present study, the change of electrical conductivity caused by electric current flow in the through-thickness direction was investigated experimentally. Observation of temperature distribution during the current input test by a thermography camera revealed that a temperature increases only at the fiber contact regions, which leads to the increase of electrical conductivity in the through-thickness direction.
