Nonlinear Ultrasonic Spectroscopy for Closed Defects and Microscopic Damage by Amplitude-Modulated Waves

调幅波闭合缺陷和微观损伤的非线性超声光谱

• 批准号: 22656029
• 负责人: BIWA Shiro
• 金额: $ 2.24万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22656029/
• 关键词: 非破壊評価; 超音波; 非線形特性; 接触界面; 複合材料; 機械材料・材料力学; 振幅変調波; 微視損傷; スペクトル解析; 機械材料材料力学; 閉口欠陥; 非線形界面モデル

Nonlinear ultrasonic characteristics of contacting interfaces and micro-damage for amplitude-modulated waves have been investigated. First, for the burst wave containing two frequency components, the transmitted wave through a contacting interface between metal blocks has been shown to contain the difference frequency component. Second, for amplitude-modulated waves propagating in a unidirectional carbon/carbon composite, the transmitted wave has been shown to change significantly accompanying low-frequency component generation. This phenomenon has been discussed based on the perturbation analysis of ultrasonic wave propagation in a nonlinear elastic medium. It is expected that these nonlinear low-frequency components can characterize defects and damage when the higher-harmonic measurements are difficult to perform.

研究了接触界面的非线性超声特性和调幅波的微损伤。首先，对于包含两个频率分量的突发波，通过金属块之间的接触界面的发射波已被证明包含差频分量。其次，对于在单向碳/碳复合材料中传播的调幅波，传输波已被证明伴随着低频分量的产生而发生显着变化。基于非线性弹性介质中超声波传播的扰动分析，讨论了这种现象。当高次谐波测量难以执行时，预计这些非线性低频分量可以表征缺陷和损坏。

项目成果

Nonlinear Propagation of Amplitude-Modulated Ultrasonic Wave in Composite Material

复合材料中调幅超声波的非线性传播

• DOI: 10.4028/www.scientific.net/kem.452-453.757
• 发表时间: 2011
• 作者: S. Biwa; K. Nagae; C. Inserra;E. Matsumoto
• 通讯作者: E. Matsumoto

微視損傷を有する材料における振幅変調波の非線形特性

微观损伤材料中调幅波的非线性特性

• 发表时间: 2012
• 作者: 琵琶志朗