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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  • X線コンピュータ断層画像を用いた一方向炭素繊維強化プラスチックの3次元有限要素モデル構築と圧縮シミュレーション
  • Xセン コンピュータ ダンソウ ガゾウ オ モチイタ イチホウコウ タンソ センイ キョウカ プラスチック ノ 3ジゲン ユウゲン ヨウソ モデル コウチク ト アッシュク シミュレーション

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Abstract

<p>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 axial Young’s modulus due to fiber random waviness was quantitatively evaluated.</p>

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