Ultrasonic Monitoring of Asymmetric Carbon Fibre Reinforced Aluminum laminates

摘要

Asymmetric carbon fibre reinforced aluminum alloy laminates was manufactured for the purpose with repeat tensile test, which will be applied in composite pressure vessel. Ultrasonic C scan and A scan approach are used to evaluate the damage of the asymmetric CFRP-A1 (carbon fibre reinforced aluminum alloy) laminates. Nondestructive detection is carried out for the CFRP-A1 laminates before and after tensile test. Comparison results and pulse echo analysis show that when subjected to repeat tensile test with 70% elastic limit strain load of the CFRP laminates, the interface debonding between CFRP and A1 will not occur but the delamination within CFRP laminates becomes the main damage of the asymmetric CFRP-A1 laminates. This investigation indicated that combined ultrasonic C scan and A scan is available for damage evaluation of fibre metal laminates.