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Mechanical analysis of fiber-reinforced plastics using an elastoplastic-damage constitutive equation considering asymmetric material behavior

机译：考虑不对称材料行为的弹塑性损伤本构型纤维增强塑料的力学分析

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摘要

Mechanical modeling of fiber-reinforced plastics to predict nonlinear mechanical behavior along the off-axis direction is very complex due to tension-compression asymmetry. This study aimed aims to develop a generalized constitutive model for different types of unidirectional and woven composites, considering tension-compression asymmetry in various deformation ranges from elastic to plastic, and finally to failure. To capture the asymmetry effectively, a new multivariable plastic model was proposed with additional dilatational components and different elastic moduli for tension and compression. Finally, asymmetric failure criteria and a damage evolution law were introduced for strength prediction. The proposed model was implemented in a finite element analysis software via a user material subroutine, and experimentally validated in terms of off-axis tension and compression tests in various loading directions. The experimental results were accurately predicted using a multi-parameter plastic model in this study compared to previous other models with few parameters.
机译：由于张力压缩不对称，纤维增强塑料的机械建模预测沿轴向轴方向的非线性机械行为非常复杂。该研究旨在为不同类型的单向和编织复合材料开发一种广义本构体模型，考虑各种变形中的张力压缩不对称从弹性到塑料，最后发生故障。为了有效地捕获不对称性，提出了一种新的多变量塑料模型，其具有额外的扩张组分和用于张力和压缩的不同弹性模量。最后，引入了不对称的故障标准和损伤进化法用于强度预测。所提出的模型通过用户材料子程序在有限元分析软件中实现，并在各种装载方向上通过偏离轴张力和压缩测试进行实验验证。与本研究中的多参数塑料模型进行了准确地预测了实验结果，与以往的其他型号有很少的参数相比。

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  • 来源
    《Composite Structures》 |2021年第9期|114268.1-114268.16|共16页
  • 作者

    Jang Jinhyeok; Jeon Seung-Yeol; Choi Jae-Hyuk; Shim Wonbo; Cho Jeong-Min; Yoon Sang-Jae; Choi Chi-Hoon; Yu Woong-Ryeol;

  • 作者单位

    Seoul Natl Univ Dept Mat Sci & Engn 1 Gwanak Ro Seoul 08826 South Korea|Seoul Natl Univ Res Inst Adv Mat RIAM 1 Gwanak Ro Seoul 08826 South Korea;

    Korea Inst Sci & Technol KIST Inst Adv Composite Mat 92 Chudong Ro Wanju Gun 55324 Jeonbuk South Korea;

    Seoul Natl Univ Dept Mat Sci & Engn 1 Gwanak Ro Seoul 08826 South Korea|Seoul Natl Univ Res Inst Adv Mat RIAM 1 Gwanak Ro Seoul 08826 South Korea;

    Seoul Natl Univ Dept Mat Sci & Engn 1 Gwanak Ro Seoul 08826 South Korea|Seoul Natl Univ Res Inst Adv Mat RIAM 1 Gwanak Ro Seoul 08826 South Korea;

    Hyundai Motor Co R&D Div 150 HyundaiYeonguso Ro Hwaseong Si 18280 South Korea;

    Hyundai Motor Co R&D Div 150 HyundaiYeonguso Ro Hwaseong Si 18280 South Korea;

    Hyundai Motor Co R&D Div 150 HyundaiYeonguso Ro Hwaseong Si 18280 South Korea;

    Seoul Natl Univ Dept Mat Sci & Engn 1 Gwanak Ro Seoul 08826 South Korea|Seoul Natl Univ Res Inst Adv Mat RIAM 1 Gwanak Ro Seoul 08826 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
  • 中图分类
  • 关键词

    Fiber-reinforced plastics; Tension-compression asymmetry; Constitutive equation; Elasto-plastic; Failure criterion;

    机译：纤维增强塑料;张力 - 压缩不对称;本构方程;弹性塑料;故障标准;

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