Nonlinear ultrasonic evaluation of the fatigue damage of adhesive joints

被引：76
|
作者：
Shui, Guoshuang [1 ]
Wang, Yue-sheng [1 ]
Huang, Peng [1 ]
Qu, Jianmin [2 ]
机构：
[1] Beijing Jiaotong Univ, Dept Mech, Beijing 100044, Peoples R China
[2] Northwestern Univ, Dept Civil & Environm Engn, Evanston, IL 60208 USA
来源：
NDT & E INTERNATIONAL | 2015年 / 70卷
基金：
美国国家科学基金会; 中国国家自然科学基金;
关键词：
Nonlinear ultrasonics; Fatigue damage; Adhesive joints; Non-destructive evaluation; OF-THE-ART; GUIDED-WAVES; PROPAGATION; BONDS; DEGRADATION;
D O I：
10.1016/j.ndteint.2014.11.002
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：9 / 15
页数：7
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