期刊
ADVANCED COMPOSITE MATERIALS
卷 28, 期 1, 页码 73-85出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09243046.2018.1434731
关键词
polymer matrix composites; fiber waviness; misalignment; X-ray computed tomography; compression
资金
- JSPS KAKENHI [JP26820014]
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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