최낙삼
2019-10-14T07:20:56Z
2019-10-14T07:20:56Z
2005-06
NDT & E INTERNATIONAL, v. 38, No. 4, Page. 268-274
0963-8695
https://www.sciencedirect.com/science/article/pii/S0963869504001173
https://repository.hanyang.ac.kr/handle/20.500.11754/111064
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.
This work was supported by the research fund of Hanyang University (HY-2002). The authors are grateful to Mr Y.B. Kim for his experimental assistance.
en_US
ELSEVIER SCI LTD
acoustic emission
composites
Kaiser effects
thermal cyclic-load
source mechanisms
Kaiser effects in acoustic emission from composites during thermal cyclic-loading
Article
10.1016/j.ndteint.2004.09.005
NDT & E INTERNATIONAL
Choi, Nak-Sam
Kim, Tae-Won
Rhee, Kyoung Y.
2007206951
E
COLLEGE OF ENGINEERING SCIENCES[E]
DEPARTMENT OF MECHANICAL ENGINEERING
nschoi