Strain monitoring in glass fiber reinforced composites embedded with carbon nanopaper sheet using Fiber Bragg Grating (FBG) sensors |
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| Authors: | Xuefeng Zhao Jihua Gou Gangbing Song Jinping Ou |
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| Affiliation: | 1. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China;2. Department of Mechanical, Materials and Aerospace Engineering, University of Central Florida, FL 32816, USA;3. Department of Mechanical Engineering, University of Houston, Houston, TX 77004, USA;1. Telecommunications Laboratory (LABTEL), Electrical Engineering Department, Federal University of Espírito Santo, Fernando Ferrari Avenue, 29075-910 Vitória-ES, Brazil;2. Instituto de Telecomunicações, Campus Universitário de Santiago, 3810-193 Aveiro, Portugal;1. Faculty of Health Engineering and Sciences, University of Southern Queensland, Toowoomba 4350, Australia;2. Advance Structural Integrity and Vibration Research (ASIVR), Faculty of Mechanical Engineering, University Malaysia Pahang, Pekan 26600, Pahang, Malaysia;1. School of Civil Engineering of Chongqing University, Chongqing 400045, PR China;2. Key Laboratory of New Technology for Construction of Cities in Mountain Area, Ministry of Education, Chongqing University, Chongqing 400045, PR China;3. College of Electro-optic Engineering of Chongqing University, Chongqing 400044, PR China |
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| Abstract: | A novel approach has been developed to fabricate multifunctional nanocomposites using carbon nanopaper sheets. In this study, vapor grown carbon nanofibers are pre-formed as carbon nanopaper sheet. The carbon nanopaper sheet had a porous structure with highly entangled carbon nanofibers. The as-prepared carbon nanopaper sheet was integrated into the laminates through vacuum-assisted resin transfer molding (VARTM) process. To study the integrity of the hybrid nanocomposites, Fiber Bragg Grating (FBG) sensors were embedded into laminated composites. Two types of composite specimens were fabricated to study the characteristics of strain distribution between different layers. The inter-layer strains of the laminates with carbon nanopaper sheet under static bending loads were measured, indicating that carbon nanopaper sheet was fully integrated to the laminates. A tensile test of the laminates with carbon nanopaper sheet as surface layer was conducted, indicating a good bonding between carbon nanopaper sheet and baseline laminates. In addition, scanning electron microscopy (SEM) was used to investigate the impregnation of carbon nanopaper by the resin during the VARTM process. The SEM images show that a complete penetration of the resin through carbon nanopaper was achieved. Therefore, there was a good structural integrity of carbon nanopaper sheet with the laminates. |
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