Development of a three-dimensional finite element model for a unidirectional carbon fiber reinforced plastic based on X-ray computed tomography images and the numerical simulation on compression |
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Authors: | Keisuke Iizuka Masahito Ueda Takuya Takahashi Akinori Yoshimura Masahiro Nakayama |
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Affiliation: | 1. Department of Mechanical Engineering, College of Science &2. Technology, Nihon University, 1-8-14 Kanda-surugadai, Chiyoda, Tokyo 101-8308, Japan;3. Advanced Composite Research Center, Institute of Aeronautical Technology, Japan Aerospace Exploration Agency (JAXA), 6-13-1 Osawa, Mitaka, Tokyo 181-0015, Japan |
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Abstract: | A unidirectional carbon fiber reinforced plastic (CFRP) was scanned by an X-ray computed tomography (CT) system. Based on the X-ray CT images, a three-dimensional model with random fiber waviness was developed. Each fiber location was identified in a sectional CT image. Subsequently, the relative displacement of fibers between adjacent sectional CT images was obtained with a digital image correlation method. This procedure was repeated to obtain fiber waviness along the axial direction. The constructed three-dimensional fiber model showed random waviness of each fiber in the unidirectional CFRP. Finite element analysis was performed using the three-dimensional model. Simulation results showed bending and twisting deformations coupled with axial contractions during axial compression, which developed due to fiber waviness. A reduction of the fiber directional Young’s modulus due to fiber random waviness was quantitatively evaluated. |
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Keywords: | polymer matrix composites fiber waviness misalignment X-ray computed tomography compression |
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