Out-of-resonance vibration modulation of ultrasound with a nonlinear oscillator for microcrack detection in a cantilever beam

被引：8

作者：

He, Qingbo ^{[1
]}

Xu, Yanyan ^{[1
]}

Lu, Siliang ^{[1
]}

Dai, Daoyi ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Precis Machinery & Precis Instrumentat, Hefei 230026, Anhui, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2014年 / 104卷 / 17期

基金：

中国国家自然科学基金;

关键词：

DAMAGE DETECTION;

D O I：

10.1063/1.4874650

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This Letter reports an out-of-resonance vibro-acoustic modulation (VAM) effect in nonlinear ultrasonic evaluation of a microcracked cantilever beam. We design a model to involve the microcracked cantilever beam in a nonlinear oscillator system whose dynamics is introduced to extend the operating vibration excitation band of the VAM out of resonance. The prototype model exhibits an effective bandwidth four times that of the traditional linear model. The reported VAM effect allows efficiently enhancing the detection, localization, and imaging of various types of microcracks in solid materials at out-of-resonance vibration excitation frequencies. (C) 2014 AIP Publishing LLC.

引用

页数：4

共 11 条

[1] Experimental Study of Impact-Damage Detection in Composite Laminates using a Cross-Modulation Vibro-Acoustic Technique [J].