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Prediction of non-linear mechanical behavior of shear deformed twill woven composites based on a multi-scale progressive damage model

机译：基于多尺度渐进损伤模型的斜纹斜纹编织复合材料非线性力学性能预测

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摘要

In this paper, the non-linear mechanical behavior of shear deformed woven composite was predicted using a representative volume element (RVE) model based on multi-scale progressive failure analysis. The micro-scale RVE model, consisting of single fiber and a matrix, was employed to determine the stress amplification factor and distinguish the failure of each fiber and the matrix constituent. Then, a meso-scale RVE model of shear deformed twill woven composite was developed to predict non-linear behavior using micro-stress transferring with finite element simulation. Fiber yarn shapes were observed with respect to the shear angle of the twill fabric. Based on the observed yarn geometry, shear deformed twill composite was modeled by using the open source software TexGen. To prove validity of the proposed model, shear deformed twill woven composite was fabricated using a picture frame, followed by a vacuum assisted resin transfer molding process. Mechanical tests were conducted and the failure progress during the tests was observed to determine their failure analysis. As a result, a good correlation between the multi-scale progressive damage model and experimental results such as mechanical properties, the non-linear stress-strain curve, and failure modes were achieved.
机译：本文基于多尺度渐进破坏分析，使用代表体积元（RVE）模型预测了剪切变形机织复合材料的非线性力学行为。由单纤维和基质组成的微型RVE模型用于确定应力放大因子并区分每根纤维和基质成分的破坏。然后，建立了剪切变形斜纹编织复合材料的中尺度RVE模型，利用微应力传递和有限元模拟来预测非线性行为。相对于斜纹织物的剪切角观察到纤维纱的形状。根据观察到的纱线几何形状，使用开源软件TexGen对剪切变形的斜纹复合材料进行建模。为了证明所提出模型的有效性，使用相框制作了剪切变形的斜纹编织复合材料，然后进行了真空辅助树脂传递模塑工艺。进行了机械测试，并观察了测试过程中的故障进度，以确定其故障分析。结果，在多尺度渐进损伤模型与实验结果（如力学性能，非线性应力-应变曲线和破坏模式）之间取得了良好的相关性。

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  • 来源
    《Composite Structures》 |2019年第9期|111019.1-111019.11|共11页
  • 作者

    Hwang Yeon-Taek; Choi Kyung-Hee; Kim Jae-In; Lim Jaeyoung; Nam Byeunggun; Kim Hak-Sung;

  • 作者单位

    Hanyang Univ, Dept Mech Engn, 222 Wangsimni Ro, Seoul 133791, South Korea;

    Hanyang Univ, Dept Mech Engn, 222 Wangsimni Ro, Seoul 133791, South Korea;

    Hanyang Univ, Dept Mech Engn, 222 Wangsimni Ro, Seoul 133791, South Korea;

    Hyundai Motor Co, Vehicle Safety CAE Team 1, Gyeonggi Do 445709, South Korea;

    Hyundai Motor Co, Vehicle Safety CAE Team 1, Gyeonggi Do 445709, South Korea;

    Hanyang Univ, Dept Mech Engn, 222 Wangsimni Ro, Seoul 133791, South Korea|Hanyang Univ, Inst Nano Sci & Technol, 222 Wangsimni Ro, Seoul 133791, South Korea;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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