Publication Date:
2019-08-28
Description:
Acoustic emission analysis as a quasi-nondestructive test method makes it possible to differentiate clearly, in judging the total behavior of fiber-reinforced plastic composites, between critical failure modes (in the case of unidirectional composites fiber fractures) and non-critical failure modes (delamination processes or matrix fractures). A particular advantage is that, for varying pressure demands on the composites, the emitted acoustic pulses can be analyzed with regard to their amplitude distribution. In addition, definite indications as to how the damages occurred can be obtained from the time curves of the emitted acoustic pulses as well as from the particular frequency spectrum. Distinct analogies can be drawn between the various analytical methods with respect to whether the failure modes can be classified as critical or non-critical.
Keywords:
COMPOSITE MATERIALS
Type:
NASA-TM-75737
,
European Conf. on Non-Destructive Testing; Apr 24, 1978 - Apr 26, 1978; Mainz; Germany
Format:
application/pdf
Permalink
