...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Computer Methods in Applied Mechanics and Engineering >Modeling continuous grain crushing in granular media: A hybrid peridynamics and physics engine approach
【24h】

Modeling continuous grain crushing in granular media: A hybrid peridynamics and physics engine approach

机译：粒状培养基中的连续粒度模拟：杂交性闭膜动力和物理引擎方法

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Numerical modeling of crushable granular materials is a challenging but important topic across many disciplines of science and engineering. Commonly adopted modeling techniques, such as those based on discrete element method, often over-simplify the complex physical processes of particle breakage and remain a far cry from being adequately rigorous and efficient. In this paper we propose a novel, hybrid computational framework combining peridynamics with a physics engine to simulate crushable granular materials under mechanical loadings. Within such framework, the breakage of individual particles is analyzed and simulated by peridynamics, whilst the rigid body motion of particles and inter-particle interactions are modeled by the physics engine based on a non-smooth contact dynamics approach. The hybrid framework enables rigorous modeling of particle breakage and allows reasonable simulation of irregular particle shapes during the continuous breakage process, overcoming a glorious drawback/challenge faced by many existing methods. We further demonstrate the predictive capability of the proposed method by a simulation of one-dimensional compression on crushable sand, where Weibull statistical distribution on the particle strength is implemented. The simulation results exhibit reasonable agreement with experimental observations with respect to normal compression line, particle size distribution, fractal dimension, as well as particle morphology. The presented work provides a rigorous and efficient way to study the complex process of particle breakage in granular media, and offers future opportunities to examine micro-structural behaviors of crushable granular materials. (C) 2019 Elsevier B.V. All rights reserved.
机译：可抵抗颗粒材料的数值模型是一种挑战，但科学与工程的许多学科都有一个挑战但重要的话题。通常采用的建模技术，例如基于离散元件的那些，通常过度简化颗粒破损的复杂物理过程，并且仍然是充分严格和高效的难度。在本文中，我们提出了一种新颖的混合计算框架，将角度与物理发动机组合在机械载荷下模拟可抵抗力颗粒材料。在这样的框架内，通过白角度来分析和模拟各个颗粒的破损，而基于非平滑接触动力学方法，颗粒的刚性体外和颗粒间相互作用的刚性体外运动。混合框架可以实现颗粒破损的严格建模，并允许在连续破碎过程中合理地模拟不规则颗粒形状，克服了许多现有方法所面临的光荣缺点/挑战。我们进一步证明了所提出的方法的预测能力，通过模拟抗皱砂对粒子强度的一维压缩来实现粒子强度的统计分布。模拟结果表现出与正常压缩线，粒度分布，分形尺寸以及颗粒形态的实验观察结果合理的协议。本工作提供了一种严格有效的方法来研究粒状介质中颗粒破损的复杂过程，并提供了未来的机会来检查可抵碎颗粒材料的微观结构行为。 （c）2019 Elsevier B.v.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号