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Deformation and fracture mechanisms of automated fiber placement pre-preg laminates under out-of-plane tensile loading

机译：在平面外拉伸载荷下自动纤维放置预先放置层压材料的变形和断裂机制

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摘要

This study concerns the effect of AFP process-induced microstructure and imperfections on the failure response of composite laminates subjected to out-of-plane tensile loading. Microstructure-based description and analysis of automated layup and forming of laminates are firstly conducted by experimental observation. Further, two failure modes are experimentally obtained for understanding the fracture mechanisms of the AFP laminates under out-of-plane tensile loading. In order to capture transition zones of the random gaps and their developments, a two-step approach for constructing a more realistic geometrical model is presented, thereby establishing an AFP random gap model to account for the deformation and failure mechanisms of the out-of-plane tensile specimens. Numerical results show a good agreement with experiments in terms of material modulus and strength and in predicting the failure behavior. In addition, parametric studies show significant knockdown in out-of-plane tensile properties due to gaps, specifically with larger gap sizes showing higher knockdown.
机译：本研究涉及AFP过程诱导的微观结构和缺陷对经受外平面外拉伸负载外的复合层压板的破坏响应的影响。通过实验观察首先进行基于微结构的描述和层压板的形成和形成层压材料。此外，实验地获得了两种故障模式以理解在平面外拉伸负载下的AFP层压板的断裂机制。为了捕获随机间隙的转换区域及其开发，提出了一种用于构建更现实的几何模型的两步方法，从而建立AFP随机间隙模型，以解释OUT-OUT-的变形和故障机制平面拉伸样品。数值结果与材料模量和强度方面的实验表现出良好的一致性，以及预测失败行为。此外，参数研究表现出由于间隙而导致的平面外拉伸性能的显着敲低，具体地具有较大的间隙尺寸，显示出更高的敲低。

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  • 来源
    《Composite Structures》 |2021年第1期|112948.1-112948.10|共10页
  • 作者

    Zhou Weizhu; Cheng Qunlin; Xu Qiang; Zhu Weidong; Ke Yinglin;

  • 作者单位

    Zhejiang Univ Sch Mech Engn State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Key Lab Adv Mfg Technol Zhejiang Prov Hangzhou 310027 Peoples R China;

    Shanghai Acad Spaceflight Technol Shanghai 201109 Peoples R China;

    Zhejiang Univ Sch Mech Engn State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Key Lab Adv Mfg Technol Zhejiang Prov Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Mech Engn State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Key Lab Adv Mfg Technol Zhejiang Prov Hangzhou 310027 Peoples R China;

    Zhejiang Univ Sch Mech Engn State Key Lab Fluid Power & Mechatron Syst Hangzhou 310027 Peoples R China|Zhejiang Univ Sch Mech Engn Key Lab Adv Mfg Technol Zhejiang Prov Hangzhou 310027 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

    AFP induced gaps; Computational model; Progressive damage analysis; Mechanical testing;

    机译：None;

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