Investigation in Properties of Interface Flaws by Use of Ultrasonics

利用超声波研究界面缺陷的性质

• 批准号: 06650499
• 负责人: KOBAYASHI Shoichi
• 金额: $ 1.54万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650499/
• 关键词: Ultrasonic; Flaw detection; Inverse analysis; Laser-Doppler vibrometer; Time-domain Boundary Element Method; Digital-data acquisition

We intended to investigated in the followings :1) Identification of flaws : We develop a technique for inverse numerical analysis making use of the time-domain Boundary Elenment Method, which may enable us to detect a flaw in a 3-D body using only several data measured on the surface points.2) High-precision digital data acquisition system for ultrasonic surface motions : Making use of a laser-Doppler vibrometer and a digital oscilloscope, we set up a high-precision data acquisition system.3) Inverse analysis using data of wave motions observed in a model surface containing a slit : Using the above-mentioned system we collected scattered wave motion data at several points on the surface of a model having a flaw induced by incident waves of several directions.4) Evaluation of deterioration of materials : Data obtained using the above-mentioned system are supplied to investigate in several important characteristics as specter, damping, phase and to evaluate the deterioratio of materials.5) To these objects the followings are results :1) Almost achieved. 2) Completed. 3) Partly-done, in progress. 4) In preparation.

我们打算在以下内容中进行调查：1）识别缺陷：我们开发了一种用于利用时间域边界弹性方法的逆数值分析的技术，这可能使我们只能使用表面上的几个数据来检测3-D身体中的瑕疵。 3）使用在包含裂缝的模型表面上观察到的波动数据的数据逆分析：使用上述系统，我们在模型表面上的几个点上收集了散射的波动数据，该模型表面的表面诱导了一个缺陷，该模型由几个指令的入射波引起的缺陷引起的差异。为了评估材料的恶化。5）对于这些对象，以下是结果：1）几乎实现了。 2）完成。 3）部分进行。 4）准备。

项目成果

Nishimura, Naoshi & Kobayashi, Shoichi: "Crack Determination in Time Domain with Collocation BIEM" Computational Mechanics '95 (eds.N.S.Atluri et al.). 2862-2867 (1995)

西村直志

S. Kobayashi: "Crack Determination in Time Domain with Collocation BIEM" Computational Mechanics '95(eds. N. S. Atluri et al.). 2862-2867 (1995)

S. Kobayashi：“时域裂纹测定与搭配 BIEM”计算力学 95（编辑 N. S. Atluri 等人）。

Nishimura, Naoshi & Kobayashi, Shoichi: "Crack Determination in Time Domain with Collocation BIEM" Computational Mechanics'95 (eds. N. S. Atluri et al. ). 2862-2867 (1995)

西村直志