2021 Fiscal Year Final Research Report
Investigation of ultrasonic resonance phenomena in adhesively bonded joints and establishment of the integrity evaluation principle
Project/Area Number |
20K14614
|
Research Category |
Grant-in-Aid for Early-Career Scientists
|
Allocation Type | Multi-year Fund |
Review Section |
Basic Section 18010:Mechanics of materials and materials-related
|
Research Institution | Osaka University |
Principal Investigator |
Mori Naoki 大阪大学, 工学研究科, 助教 (00802092)
|
Project Period (FY) |
2020-04-01 – 2022-03-31
|
Keywords | 接着接合 / 非破壊評価 / 超音波 / 共振 / ガイド波 / 界面 / 干渉 / 機械材料・材料力学 |
Outline of Final Research Achievements |
In this research project, we performed theoretical and experimental investigation on the resonance phenomena in adhesively bonded joints subjected to two different ultrasonic wave modes. For normal incidence of a longitudinal wave, the effect of adherends, adhesive layer, and interfaces on the resonance characteristics was clarified for similar joints of carbon fiber reinforced plastics and dissimilar joints of metal and plastic. For Lamb wave incidence on a single lap joint, it was shown that the resonance characteristics of the transmission spectrum depend on the bond length and the shear bond stiffness of the joint. Using the above results, we proposed characterization methods for adhesive joints based on the ultrasonic resonance characteristics.
|
Free Research Field |
非破壊評価工学
|
Academic Significance and Societal Importance of the Research Achievements |
本研究によって,接着継手に含まれる各層の弾性特性や厚さ,継手の寸法が超音波による共振特性に及ぼす影響を理論的・実験的に明らかにし,その結果を国際学術誌や学会で報告することができた.また,得られた基礎的知見を基に構築した接着継手の特性評価法は,既存の欠陥検出法とは異なるアプローチによって健全性評価の高度化を目指す端緒になると期待している.以上のように,本研究課題によって学術的に意義のある成果が得られたと同時に,接着技術の高度化という社会的な課題解決に向けて継手評価手法の深化に貢献できたと考えている.
|