Abstract
Fibrous composite laminate can fail by three fracture modes: fibre fracture, in-plane matrix cracking and delamination. Micro-fracture starts at relatively low stress levels, but not all fracture modes are hazardous. With a relatively simple technique, the amplitude intensity of the acoustic emission of the micro-fracture can be performed. The amplitude intensities from particular specimens, which impose the different fracture modes, differ from each other. Thus a ‘signature’ of each failure mode can be used in non-destructive testing.
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