Evaluation of the integrity of 3D orthogonal woven composites with embedded polymer optical fibers |
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| Affiliation: | 1. College of Textile, 2401 Research Drive, North Carolina State University, Raleigh, NC 27695, USA;2. Textile Research Division, National Research Centre, 33 El Bohouth St., Dokki 12622, Egypt;3. Department of Mechanical and Aerospace Engineering, Campus Box 7910, North Carolina State University, Raleigh, NC 27695, USA;1. Department of Mechanical and Aerospace Engineering, North Carolina State University, Campus Box 7910, Raleigh, NC, 27695, USA;2. Centre for Microsystems Technology (CMST), Ghent University, Technologiepark 914a, 9052 Ghent, Belgium;3. Department of Electrical and Computer Engineering, Brigham Young University, 459 Clyde Building, Provo, UT, 84602, USA;1. Laboratory of Applied Mechanics and Reliability Analysis (LMAF), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland;2. Laboratory for Polymer and Composite Technology (LTC), Ecole Polytechnique Fédérale de Lausanne (EPFL), Switzerland;3. Institute of Microengineering (IMT), Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland;1. LUNAM University, Maine University, Acoustic Laboratory of Maine University (LAUM) CNRS UMR 6613, Avenue Olivier Messiaen, 72085 Le Mans Cedex 9, France;2. Sfax University, Faculty of Sciences of Sfax, Department of Physics BP1171, 3000 Sfax, Tunisia;1. Université de Haute-Alsace, Laboratoire de Physique et Mécanique Textiles (LPMT, UR 4365), École Nationale Supérieure d′Ingénieurs Sud Alsace, 11 rue Alfred Werner, 68093 Mulhouse, France;2. Empa, Swiss Federal Laboratories for Materials Science and Technology, Laboratory for Biomimetic Membranes and Textiles, Lerchenfeldstrasse 5, St. Gallen, Switzerland;1. AMADE, Dept. of Mechanical Engineering and Industrial Construction, Universitat de Girona, Campus Montilivi s/n, E-17071 Girona, Spain;2. Advanced Composites Centre for Innovation and Science, University of Bristol, University Walk, Bristol BS8 1TR, United Kingdom |
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| Abstract: | Due to their high flexibility, high tensile strain and high fracture toughness, polymer optical fibers (POF) are excellent candidates to be utilized as embedded sensors for structure health monitoring of fiber reinforced composites. In 3D orthogonal woven structures yarns are laid straight and polymer optical fiber can be easily inserted during preform formation either as a replacement of constituents or between them. The results of the previous paper indicated how an optic fiber sensor can be integrated into 3D orthogonal woven preforms with no signal loss. This paper addresses whether incorporating POF into 3D orthogonal woven composites affects their structure integrity and performance characteristics. Range of 3D orthogonal woven composites with different number of layers and different weft densities was fabricated. The samples were manufactured with and without POF to determine the effect of embedding POF on composite structure integrity. Bending, tensile strength tests, and cross section analysis were conducted on the composite samples. Results revealed that integrity of 3D orthogonal woven composite was not affected by the presence of POF. Due to its high strain, embedded POF was able to withstand the stresses without failure as a result of conducting destructive tests of the composite samples. Micrograph of cross-section of composite samples showed that minimum distortion of the yarn cross-section in vicinity of POF and no presence of air pocked around the embedded POF which indicates that 3D woven preform provided a good host for embedded POF. |
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| Keywords: | A Glass fibers A Resins A 3-Dimensional reinforcement B Mechanical properties |
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