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Numerical simulation of stress distribution for CF/EP composites in high temperatures

机译：高温CF / EP复合材料应力分布的数值模拟

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摘要

The high-performance carbon fiber materials can be obtained by decomposing carbon fiber reinforced resin matrix composites using thermally activated oxide semiconductors. This paper established the representative volume element (RVE) of carbon fiber/epoxy resin composites, and investigated the structure destruction of composites in the recycling process based on analysis of the stress and strain distribution by the thermomechanical coupling module of Digimat. The results indicated that the maximum thermal stress of the epoxy resin appeared in the poor resin region, while the minimum appeared in the resin-rich region; the stress of the carbon fibers in poor resin region was greater than that in the resin-rich region; the maximum stress of composites appeared in the interface layers when the temperature ranged from 350 to 500 degrees C, and the maximum thermal stress was 196.9-281.3 MPa, as well as the maximum shear stress was 98.2-140.3 MPa; the maximum peeling stress perpendicular to the fiber directions was 53.7-157.3 MPa; the strain of the interface layers and carbon fibers were the smaller than that of the resin matrix, whose maximum strain ranged from 0.0622 to 0.0889. The structure destruction of the composites was caused by both the peeling stress and the interfacial shear stress in recycling.
机译：高性能碳纤维材料可以通过使用热敏氧化物半导体分解碳纤维增强树脂基质复合材料来获得。本文建立的碳纤维/环氧树脂复合材料的代表性体积单元（RVE），并且基于由DIGIMAT的热机械耦合模块的应力和应变分布的分析研究复合物的结构破坏在回收过程中。结果表明环氧树脂的最大热应力出现在贫差的树脂区域中，而最小在富含树脂的区域中出现;贫硅纤维在富含树脂区域的碳纤维的应力大于树脂区域;复合材料的最大应力出现在界面层时的温度范围为350至500℃，和最大热应力为196.9-281.3兆帕，以及最大剪切应力为98.2-140.3兆帕斯卡;垂直于纤维方向的最大剥离应力为53.7-157.3MPa;界面层和碳纤维的菌株比树脂基质的应变小，其最大应变范围为0.0622至0.0889。复合材料的结构破坏是由剥离应力和再循环中的界面剪切应力引起的。

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  • 来源
    《Journal of thermal stresses》 |2019年第6期|416-425|共10页
  • 作者

    Cheng Huanbo; Chang Jiahua; Sun Yu; Zhang Jie; Wang Xin;

  • 作者单位

    Nanjing Inst Technol Sch Mech Engn Nanjing 211167 Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Mech Engn Nanjing 211167 Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Mech Engn Nanjing 211167 Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Mech Engn Nanjing 211167 Jiangsu Peoples R China;

    Nanjing Inst Technol Sch Mech Engn Nanjing 211167 Jiangsu Peoples R China;

  • 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

    CF; EP composites; poor resin region; resin-rich region; thermal stress; thermal strain;

    机译：CF;EP复合材料;树脂区差;富含树脂区域;热应力;热应变;

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