AE-Tomography for anisotropic materials

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K06193
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Nihon University
• Principal Investigator: KOBAYASHI Yoshikazu 日本大学, 理工学部, 教授 (20339253)
• Co-Investigator(Kenkyū-buntansha): 塩谷 智基 京都大学, 工学研究科, 特定教授 (40443642) ; 小田 憲一 日本大学, 理工学部, 助教 (70632298) ; 桃木 昌平 飛島建設株式会社技術研究所, －, 副主任研究員 (80463579)
• Research Collaborator: CHAI Hwa-Kian
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: AEトモグラフィ法 / 異方性 / 複合材料 / 弾性波速度 / 位置標定 / 破線追跡法 / 速度プロファイル / 逆解析

Outline of Final Research Achievements

A new algorithm of AE-Tomography was developed for evaluations of anisotropic materials in this study. AE-Tomography is a technique that identifies source locations of elastic waves and elastic wave velocity distributions by using only arrival times of the elastic waves on the basis of the ray-trace technique for considering heterogeneity of elastic wave velocity distributions that is caused by local damages and defects. The anisotropy is considered by using slowness profiles in the ray-trace technique that is used in the identifications of source locations of the elastic waves and elastic wave velocity distributions in AE-Tomography. The developed technique was verified by comparing the original elastic wave velocity distributions and identified elastic wave velocity distributions on various conditions, and it was confirmed that the technique qualitatively identifies elastic wave velocity distribution correctly.

Free Research Field

維持管理工学