Kaiser effects in acoustic emission from composites during thermal cyclic-loading
- Authors
- Choi, Nak-Sam; Kim, Tae-Won; Rhee, Kyoung Y.
- Issue Date
- Jun-2005
- Publisher
- ELSEVIER SCI LTD
- Keywords
- acoustic emission; composites; Kaiser effects; thermal cyclic-load; source mechanisms
- Citation
- NDT & E INTERNATIONAL, v.38, no.4, pp.268 - 274
- Indexed
- SCIE
SCOPUS
- Journal Title
- NDT & E INTERNATIONAL
- Volume
- 38
- Number
- 4
- Start Page
- 268
- End Page
- 274
- URI
- https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/45896
- DOI
- 10.1016/j.ndteint.2004.09.005
- ISSN
- 0963-8695
- 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.
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