ULTRASONIC-DETECTION OF DELAMINATIONS ON COMPOSITE-MATERIALS

An accurate N.D.I. methodology can give a good knowledge of the intern al damage status. The main purpose of the present paper is to describe the testing methodology and to discuss the testing procedures that ha ve been performed in order to evaluate the position and the dimensions of the delaminations Chat occur in different composite materials unde r various load conditions. For the delaminations detection inside CFRP laminates and sandwich panels subjected to impact and fatigue loads, an ultrasonic apparatus, in form of reflection, has been utilized. Thi s apparatus, suitable fnr in situ inspections, has been successfully u tilized in our laboratory. The analysis of the experimental results sh ows the capability of the system to be adopted for any application whe re the presence of delaminations is expected.