Ultrasonic inspection of composites materials: Application to detect impact damage

Failures detection in composite laminates is complicated respect to conventional non-destructive testings for metal structures, due their sensibility echoes drown noise depending by the different properties of constituent materials and multi-layered composites structures. The latter, particular, are sensitive impact damage also a low-energy can results severe loss load capacity as result delamination. In this study, effectiveness low-velocity impacts several laminates, at energy levels, investigated using ultrasonic technique. latter technique was adopted verify its capability afford info on shape size delamination, presence entirely parameters. It useful even test influence factors dynamic behavior studied composites. Pulse-echo method with faced array transducers (f = 5 MHz) used diffuse receive ultrasound waves. provided information understand mechanisms onset propagation damage.