Damage evaluation and strain monitoring for composite cylinders using tin-coated FBG sensors under low-velocity impacts |
| |
| Affiliation: | 1. Launch Complex Team (LCT), KSLV-II R&D Program Executive Office, Korea Aerospace Research Institute (KARI), 169-84 Gwahak-ro, Yuseong-gu, Daejeon 305-806, Republic of Korea;2. The William E. Boeing Department of Aeronautics and Astronautics, University of Washington, USA;3. Body Durability CAE Team, Automotive Research & Development Division, Hyundai Motor Group, 150 Hyundai Yeonguso-ro, Hwaseong-si, Gyeonggi-do 445-706, Republic of Korea;4. School of Mechanical, Aerospace and Systems Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea;1. Necmettin Erbakan University, Meram Vocational School, Konya, 42060, Turkey;2. Necmettin Erbakan University, Dept. Mechanical Engineering, Seydi?ehir ACMF, Konya, 42060, Turkey;3. Bursa Technical University, Dept. Metallurgical and Materials Engineering, Bursa, 16310, Turkey;4. Selçuk University, Dept. Mechanical Engineering, Konya, 42003, Turkey;1. National Engineering Laboratory for Fiber Optic Sensing Technology, Wuhan University of Technology, Wuhan 430070, People’s Republic of China;2. WUTOS Technology Co Ltd, Wuhan 430223, China;1. SINTEF Material and Chemistry Department of Material and Structural Mechanics, N-7491 Trondheim, Norway;2. SINTEF Material and Chemistry Department of Composite and Polymer, Oslo, Norway;3. SINTEF Raufoss Manufacturing, Raufoss, Norway;1. Korea Aerospace Research Institute, 169-84 Gwahangno, Yuseong-gu, Daejeon, 305-806, Republic of Korea;2. Division of Aerospace Engineering, School of Mechanical, Aerospace & System Engineering, KAIST, 291 Daehak-ro, Yuseong-gu, Daejeon, 305-701, Republic of Korea;1. Department of Aerospace Engineering, Korea Advanced Institute of Science and Technology, 373-1 Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea;2. Rocket Engine Team, Korea Aerospace Research Institute, 169-84 Gwahak-ro, Yuseong-gu, Daejeon 34133, Republic of Korea |
| |
| Abstract: | Background/purposeThe impact-induced damage of composite structures induced by low-velocity impacts were evaluated to verify the damage evaluation concept using the “memory effects” of tin-coated FBG sensors.MethodsLow-velocity impact tests for the composite cylinder with tin-coated FBG sensors were performed at three impact energies. Hoop ring tests for the composite cylinder including impact-induced damage were additionally undertaken in order to measure the burst pressure and to study the parameter correlations. The test results were compared with the numerical results obtained by a finite element analysis (FEA) based on a continuum damage mechanics (CDM) considering damage model. The parameter correlations among the impact parameters and the residual strains induced by tin-coated FBG sensors were investigated based on the tests results.ResultsImpact behaviors obtained by the tests and the numerical simulation were agreed well. It was found that tin-coated FBG sensors can monitor the strain of the composite cylinder under low-velocity impacts and their strain monitoring capability is comparable to that of normally used FBG sensors. The residual strains of tin-coated FBG sensors were correlated with the impact parameters such as the impact energy, the sensing position of the sensors, and the burst pressure of the composite cylinder.ConclusionThe correlations among the residual strains and the parameters proved the damage evaluation concept for composite cylinders using the “memory effects” of tin-coated FBG sensors under low-velocity impact conditions; that is, the impact-induced damage, impact location, and burst pressure can be inversely evaluated by referring to the correlations. |
| |
| Keywords: | A Laminates B Impact behavior C Finite element analysis (FEA) D Non-destructive testing E Memory effects |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
