High strain rate behavior and failure mechanism of three-dimensional five-directional carbon/phenolic braided composites under transverse compression

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• 来源
  《Composites》 |2011年第2期|p.309-317|共9页
• 作者

  Dian-sen Li; Zi-xing Lu; Nan Jiang; Dai-ning Fang;

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• 作者单位

  School of Aeronautical Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, PR China,AML, School of Aerospace, Tsinghua University, Beijing 100084, PR China;

  School of Aeronautical Science and Technology, Beijing University of Aeronautics and Astronautics, Beijing 100083, PR China;

  China Academy of Machinery of Science & Technology, Beijing 100044, PR China;

  AML, School of Aerospace, Tsinghua University, Beijing 100084, PR China;

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• 原文格式 PDF
• 正文语种 eng
• 中图分类
• 关键词

  the quasi-static and high-strain-rate compressive experiments were performed on the three dimensional (3d) five-directional carbon/phenolic braided composites with different braiding parameters in the transverse direction. transverse compressive properties at high strain rates from 500/s to 1500/s were tested using the split hopkinson pressure bar (shpb) technique. the dynamic stress vs. strain curves and important mechanical properties such as peak stress; modulus and failure strain were determined. macro-fracture morphology and the scanning electron microscope (sem) micrographs were examined to understand the deformation and failure mechanism of composites. the results show the stress vs. strain curves exhibit obvious non-linear characteristics and a marked softening phenomenon. the composites show clearly the strain rate strengthening effects and dynamic toughness phenomenon. the dama;

  机译：对具有不同编织参数的三维（3d）五向碳/酚醛编织复合材料进行了准静态和高应变率压缩实验。使用分裂霍普金森压力棒（shpb）技术测试了500 / s至1500 / s高应变速率下的横向压缩特性。动态应力-应变曲线以及重要的机械性能;例如峰值应力;测定模量和破坏应变。检查宏观断裂形态和扫描电子显微镜（sem）显微照片;以了解复合材料的变形和破坏机理。结果表明;应力-应变曲线表现出明显的非线性特征和明显的软化现象。该复合材料清楚地显示出应变速率增强作用和动态韧性现象。达摩;