The Significance of Defects in CRFP Bonded Honeycomb Structures and Non-Destructive Test Methods for Their Detection

摘要

The identification of defects which occur in carbon fiber reinforced plastics skinned aluminum honeycomb sandwich materials was undertaken, along with an assessment of their significance in terms of mechanical properties. A range of defects was examined and all were shown to have significant effects on laminate strength. Available non-destructive test methods were reviewed and evaluated using specimens containing deliberately introduced defects. The optimum available nondestructive test procedure involves a combination of visual examination, roller probe coupled ultrasonics and X-radiography. The performance of other techniques including holographic interferometry, laser speckle pattern interferometry and thermography is discussed.