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首页> 外文期刊>Granular matter >Micromechanics of elastic buckling of a colloidal polymer layer on a soft substrate: experiment and theory
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Micromechanics of elastic buckling of a colloidal polymer layer on a soft substrate: experiment and theory

机译：软基质上胶体聚合物层弹性屈曲的微力学：实验和理论

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摘要

We study the buckling instability of a colloidal particle layer adhered to an elastic substrate using an integrated experimental and theoretical approach. Experiments using monodisperse colloid-scale spherical particles made of polystyrene and silica, show that the wavelength of the initial (critical) buckling mode is independent of particle modulus and linearly dependent on particle radius-in contradiction with the predictions of the prevailing continuum model. We developed a granular model of the particle layer using structural mechanics techniques. The granular model predicts the observed wavelength of the initial, critical buckling mode within the estimated range of parameter values for the experiment. The evolution of this mode into the post-buckling regime is examined. Results highlight the crucial role of material discreteness in the mechanical response, and the need for accurate methods of estimating parameters for the particle-scale resistances against buckling.
机译：我们使用集成的实验和理论方法研究粘附到弹性基材上的胶体颗粒层的屈曲不稳定性。使用由聚苯乙烯和二氧化硅制成的单分散胶体级球形颗粒进行的实验表明，初始（临界）屈曲模式的波长与颗粒模量无关，并且与颗粒半径呈线性关系，这与现行的连续谱模型的预测相矛盾。我们使用结构力学技术开发了颗粒层的颗粒模型。颗粒模型可在实验参数值的估计范围内预测观察到的初始临界屈曲模式的波长。研究了这种模式向屈曲后状态的演变。结果突出了材料离散性在机械响应中的关键作用，并且需要精确的方法来估计抗屈曲的颗粒级电阻的参数。

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  • 来源
    《Granular matter》 |2014年第2期|249-258|共10页
  • 作者

    Antoinette Tordesillas; David Carey; Andrew B. Croll; Jingyu Shi; Bekele Gurmessa;

  • 作者单位

    Department of Mathematics and Statistics, University of Melbourne, Melbourne, VIC 3010, Australia;

    Department of Mathematics and Statistics, University of Melbourne, Melbourne, VIC 3010, Australia;

    Department of Physics, North Dakota State University, Fargo, ND 58108-6050, USA;

    Department of Mathematics and Statistics, University of Melbourne, Melbourne, VIC 3010, Australia;

    Department of Physics, North Dakota State University, Fargo, ND 58108-6050, USA;

  • 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

    Localisation; Periodicity; Bifurcation; Instability; Buckling;

    机译：本土化;周期性;分叉;不稳定;屈曲;

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