Development of ultrasonic knowledge base for evaluation of interface damage

界面损伤评估超声知识库的开发

• 批准号: 03555104
• 负责人: KITAHARA Michihiro
• 金额: $ 2.5万
• 依托单位: Tokai University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03555104/
• 关键词: Interface; Ultrasonics; Damage evaluation; Knowledge base; 波動知識ベ-ス

An ultrasonic knowledge base has been developed for the evaluation of interface defects of structural materials. The knowledge base is based on elastodynamic theory and experimental measurement. A system to e valuate an interface defect has also been proposed. The following is the summary of results in each phase of the research.1. Knowledge base from elastodynamic theory(1) Introduction of the spring model is a versatile way to represent the various situations of interface conditions.(2) To evaluate the elastodynamic far-fields, it is important to introduce the following two steps:a) evaluation of near-fields by using the full space Green's function andb) evaluation of far-fields by using the Green's function which satisfies the interface condition.(3) Back-scattered wave fields from interface defects have been calculated in some configurations of pulse-echo and pitch-catch methods of ultrasonics.2. Knowledge base from experimentComplemental back-scattered wave fields have been accumulated from experimental measurements.3. Development of evaluation systemA neural network system to evaluate a defect has been proposed by utilizing the knowledge base developed in the phases of 1. and 2.

建立了用于结构材料界面缺陷评价的超声知识库。该知识库以弹性动力学理论和实验测量为基础。本文还提出了一种评价界面缺陷的系统。以下是各阶段研究结果的总结。(1)弹簧模型的介绍是一种通用的表示界面条件的各种情况的方法。(2)对于弹性动力远场的计算，需要引入两个步骤：a)利用全空间格林函数对近场进行计算，b)利用满足界面条件的格林函数对远场进行计算。(3)计算了几种超声脉冲回波和音高捕捉方法下界面缺陷的后向散射波场。实验测量积累了互补背散射波场的知识基础。利用第1阶段开发的知识库，提出了一种用于缺陷评估的神经网络系统。和2。

项目成果

Hirose,S.: "Scattering of elastic waves by a crack with spring-mass contact" International Journal for Numerical Methods in Engineering. 31. 789-801 (1991)

Hirose,S.：“弹簧-质量接触裂纹引起的弹性波散射”国际工程数值方法杂志。

HIROSE,S.: "Ultrasonic scattering analysis to characterize nonlinear behavior of material interfaces" Nondestructive Testing and Evaluation. 8-9. 405-416 (1992)

HIROSE,S.：“超声散射分析来表征材料界面的非线性行为”无损测试和评估。

KITAHARA,M.: "Boundary element-node condensed finite element method for three dimensional elastic wave propagation problems" Boundary Element Methods (Eds.S.Kodayashi and N.Nisimura,Springer). 194-201 (1992)

KITAHARA,M.：“三维弹性波传播问题的边界元节点压缩有限元法”边界元法（Eds.S.Kodayashi 和 N.Nisimura，Springer）。

Kitahara, M.: "Neural network for crack-depth determination from ultrasonic backscattering data" Review of Progress in Quantitative Nondestructive Evaluation. Vol.11. 701-708 (1992)

Kitahara, M.：“根据超声波反向散射数据确定裂纹深度的神经网络”定量无损评估进展回顾。

Hirose, S.: "Scattering of elastic waves by interface cracks between dissimilar materials" Review of Progress in Quantitative Nondestructive Evaluation. Vol.12. (1993)

Hirose, S.：“异种材料之间的界面裂纹引起的弹性波散射”定量无损评估进展回顾。