TY - JOUR
T1 - Nonlinear ultrasonic evaluation of the fatigue damage of adhesive joints
AU - Shui, Guoshuang
AU - Wang, Yue Sheng
AU - Huang, Peng
AU - Qu, Jianmin
N1 - Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2015/3
Y1 - 2015/3
N2 - An experimental method based on the nonlinear ultrasonic technique is presented to evaluate fatigue damage of an adhesive joint. In this paper, specimens made from AZ31 magnesium-aluminum alloy bonded through an epoxy layer are subjected to a fatigue load. The ultrasonic harmonics generated due to damage within the adhesive layer are measured; and the acoustic nonlinearity parameter (ANP) based on the fundamental and second harmonics is determined. The results show that the normalized ANP increases with the fatigue cycles. Furthermore, a theoretical model with different interfacial compression and tension stiffness is proposed to interpret the generation of second harmonics.
AB - An experimental method based on the nonlinear ultrasonic technique is presented to evaluate fatigue damage of an adhesive joint. In this paper, specimens made from AZ31 magnesium-aluminum alloy bonded through an epoxy layer are subjected to a fatigue load. The ultrasonic harmonics generated due to damage within the adhesive layer are measured; and the acoustic nonlinearity parameter (ANP) based on the fundamental and second harmonics is determined. The results show that the normalized ANP increases with the fatigue cycles. Furthermore, a theoretical model with different interfacial compression and tension stiffness is proposed to interpret the generation of second harmonics.
KW - Adhesive joints
KW - Fatigue damage
KW - Non-destructive evaluation
KW - Nonlinear ultrasonics
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U2 - 10.1016/j.ndteint.2014.11.002
DO - 10.1016/j.ndteint.2014.11.002
M3 - Article
AN - SCOPUS:84920195893
SN - 0963-8695
VL - 70
SP - 9
EP - 15
JO - NDT and E International
JF - NDT and E International
ER -