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首页> 外文期刊>Advanced Composite Materials: The Official Journal of the Japan Society of Composite Materials >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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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

机译：基于X射线计算机断层扫描图像的单向碳纤维增强塑料的三维有限元模型的开发及压缩数值模拟

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摘要

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.
机译：通过X射线计算断层扫描（CT）系统扫描单向碳纤维增强塑料（CFRP）。 基于X射线CT图像，开发了一种随机纤维波形的三维模型。 在截面CT图像中识别每个光纤位置。 随后，利用数字图像相关方法获得相邻截面CT图像之间的纤维的相对位移。 重复该过程以沿轴向获得纤维波纹。 构造的三维光纤模型显示了单向CFRP中每种纤维的随机波动。 使用三维模型进行有限元分析。 仿真结果显示弯曲和扭曲变形与轴向压缩期间轴向收缩，由纤维波纹开发。 定量评估引起纤维随机波动引起的光纤定向杨氏模量的降低。

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