https://scholars.lib.ntu.edu.tw/handle/123456789/598784
標題: | Adhesive joint integrity monitoring using the full spectral response of fiber bragg grating sensors | 作者: | Shin C.-S Lin T.-C. CHOW-SHING SHIN |
關鍵字: | Adhesive joint;Fatigue damage;Fiber bragg grating;Full spectral response;Integrity monitoring;Tensile damage;Adhesive joints;Adhesives;Damage detection;Defects;Failure (mechanical);Fatigue of materials;Fatigue testing;Fiber Bragg gratings;Fiber optic sensors;Fracture mechanics;Joining;Damage monitoring;Fiber Bragg Grating Sensors;Independent assessment;Joining techniques;Long term monitoring;Non-uniform strain;Single lap joints;Structural failure;Nondestructive examination | 公開日期: | 2021 | 卷: | 13 | 期: | 17 | 來源出版物: | Polymers | 摘要: | Although adhesive joining has many advantages over traditional joining techniques, their integrity is more difficult to examine and monitor. Serious structural failures might follow if adhesive joint degradation goes undetected. Available non-destructive examination (NDE) methods to detect defects are helpful in discovering defective joints during fabrication. For long-term monitoring of joint integrity, many of these NDE techniques are prohibitively expensive and time-consuming to carry out. Recently, fiber Bragg grating (FBG) sensors have been shown to be able to reflect strain in adhesive joints and offer an economical alternative for on-line monitoring. Most of the available works relied on the peak shifting phenomenon for sensing and studies on the use of full spectral responses for joint integrity monitoring are still lacking. Damage and disbonding inside an adhesive joint will give rise to non-uniform strain field that may chirp the FBG spectrum. It is reasoned that the full spectral responses may reveal the damage status inside the adhesive joints. In this work, FBGs are embedded in composite-to-composite single lap joints. Tensile and fatigue loading to joint failure have been applied, and the peak splitting and broadening of the full spectral responses from the embedded FBGs are shown to reflect the onset and development of damages. A parameter to quantify the change in the spectral responses has been proposed and independent assessment of the damage monitoring capability has been verified with post-damage fatigue tests. ? 2021 by the authors. Licensee MDPI, Basel, Switzerland. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85114196575&doi=10.3390%2fpolym13172954&partnerID=40&md5=43a7ea7e7ec660d38e1eb5423e979384 https://scholars.lib.ntu.edu.tw/handle/123456789/598784 |
ISSN: | 20734360 | DOI: | 10.3390/polym13172954 |
顯示於: | 機械工程學系 |
在 IR 系統中的文件,除了特別指名其著作權條款之外,均受到著作權保護,並且保留所有的權利。