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Kaiser effects in acoustic emission from composites during thermal cyclic-loading

Title
Kaiser effects in acoustic emission from composites during thermal cyclic-loading
Author
최낙삼
Keywords
acoustic emission; composites; Kaiser effects; thermal cyclic-load; source mechanisms
Issue Date
2005-06
Publisher
ELSEVIER SCI LTD
Citation
NDT & E INTERNATIONAL, v. 38, No. 4, Page. 268-274
Abstract
Kaiser effects in acoustic emission (AE) behavior of composite laminates under repetitive thermal cyclic-loads are quantitatively analyzed to identify AE source mechanisms. The repetitive thermal loads brought about a large reduction, i.e. an exponential decrease, in AE total ring-down counts and AE amplitudes. It was thought that generation of most thermo-AE events during the first thermal cycle was not caused by crack propagation, but by secondary micro-fracturing due to abrasive contact between crack surfaces. For subsequent thermal cycles, on the other hand, a small number of weak thermo-AE events were generated due to frictional sliding contact. Such behavior of thermo-AE showed different characteristics according to specimen types and the maximum temperature in the thermal load cycles. (C) 2004 Elsevier Ltd. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0963869504001173https://repository.hanyang.ac.kr/handle/20.500.11754/111064
ISSN
0963-8695
DOI
10.1016/j.ndteint.2004.09.005
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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