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首页> 外文期刊>Composite Structures >Effect of an interphase layer on the dynamic stress concentration in a Mg-matrix surrounding a SiC-particle
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Effect of an interphase layer on the dynamic stress concentration in a Mg-matrix surrounding a SiC-particle

机译：中间层对SiC颗粒周围Mg基体中动应力集中的影响

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摘要

The potential of using an interphase layer to reduce stress concentrations under a dynamic loading in a Mg-matrix surrounding a SiC-particle is investigated in this study. An interphase layer was applied between the particle and the matrix and the contact between them was assumed to be perfect. Both constant-property materials and functionally graded materials were considered for the interphase. A constant-property interphase was modelled as a single layer while a functionally graded interphase was divided into a number of sublayers and each sublayer was treated as having constant material properties. Numerical results reveal that the interphase layer made of a constant-property material shows better stress concentration reduction than that made of functionally graded materials. An interphase layer with low values of both shear modulus and Poisson's ratio is necessary for a significant stress concentration reduction. Studies were focused on determining the maximum stress concentration that occurs over a range of frequencies. This investigation has revealed that a stress concentration reduction of up to 44% could be realized.
机译：在这项研究中，研究了使用相间层降低动态载荷在围绕SiC颗粒的Mg基质中应力集中的潜力。在颗粒和基质之间施加了一个中间层，并且假定它们之间的接触是完美的。相间均考虑了恒特性材料和功能梯度材料。恒定特性的相被建模为单层，而功能渐变的相被划分为多个子层，每个子层被视为具有恒定的材料特性。数值结果表明，与由功能梯度材料制成的相变层相比，由恒性能材料制成的相变层具有更好的应力集中降低。具有低剪切模量和泊松比值的中间层对于显着减小应力集中是必需的。研究集中于确定在一定频率范围内发生的最大应力集中。这项调查表明，应力集中降低可以达到44％。

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  • 来源
    《Composite Structures》 |2009年第4期|451-460|共10页
  • 作者

    R. Paskaramoorthy; S. Bugarin; R. Reid;

  • 作者单位

    RP/Composites Facility, School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa;

    RP/Composites Facility, School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa;

    RP/Composites Facility, School of Mechanical, Industrial and Aeronautical Engineering, University of the Witwatersrand, Private Bag 3, Wits 2050, South Africa;

  • 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

    particle-reinforced composites; stress concentrations; interphase layers;

    机译：颗粒增强复合材料;压力集中;相间层;

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