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Stress response inside perturbed particle assemblies

机译:扰动粒子组件内部的应力响应

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摘要

The effect of structural disorder on the stress response inside three dimensional particle assemblies is studied using computer simulations of frictionless sphere packings. Upon applying a localised, perturbative force within the packings, the resulting Green's function response is mapped inside the different assemblies, thus providing an explicit view as to how the imposed perturbation is transmitted through the packing. In weakly disordered arrays, the resulting transmission of forces is of the double-peak variety, but with peak widths scaling linearly with distance from the source of the perturbation. This behaviour is consistent with an anisotropic elasticity response profile. Increasing the disorder distorts the response function until a single-peak response is obtained for fully disordered packings consistent with an isotropic description.
机译:使用无摩擦球填料的计算机模拟研究了结构无序对三维粒子组件内部应力响应的影响。在填料内施加局部扰动力时,所产生的格林函数响应会映射到不同的组件内部,从而提供有关施加的扰动如何通过填料传递的清晰视图。在弱无序的阵列中,力的传递结果是双峰的,但峰的宽度随距扰动源的距离线性缩放。此行为与各向异性弹性响应曲线一致。增加混乱会扭曲响应功能,直到获得与各向同性描述一致的完全混乱堆积的单峰响应。

著录项

  • 来源
    《Granular matter》 |2010年第1期|135-142|共8页
  • 作者

    Leonardo E. Silbert;

  • 作者单位

    Department of Physics, Southern Illinois University, Carbondale, IL 62901, 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

    force perturbations; stress response;

    机译:力扰动压力反应;

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