Computational Studies of Fracture Networks in Particulate Systems

颗粒系统中断裂网络的计算研究

基本信息

  • 批准号:
    1537306
  • 负责人:
  • 金额:
    $ 29万
  • 依托单位:
  • 依托单位国家:
    美国
  • 项目类别:
    Standard Grant
  • 财政年份:
    2015
  • 资助国家:
    美国
  • 起止时间:
    2015-09-01 至 2018-08-31
  • 项目状态:
    已结题

项目摘要

This project is motivated by recent observations of evolving fracture networks in tightly-packed systems of particles, or particle rafts, interacting with fluids. Research supported by this award is focused on computational models and simulations of these systems. Simulations will enable detailed investigations into their behavior, and help to answer open questions such as why seemingly small perturbations in particle packing give rise to dramatically different fracture patterns. The tightly packed particle network is an idealized porous medium, and the injection of surfactant is what drives the growth of the fracture networks. This type of coupling between fluid flow and crack growth is central to many problems of technological relevance, including hydraulic fracturing and corrosion-assisted fracture. The tabletop experiments are simple and cost effective to study particle systems in detail. The effort involves outreach activities to public elementary schools in North Carolina, where movies of the simulations and experiments of fracture networks will be shown. These in-class demonstrations will be used as a launching point to introduce students to basic programming concepts at a young age. The research supported by this award is aimed at using simulation science to determine the influence of particle packing, size distributions, and surfactant injection on fracture evolution in particulate systems. The simulations will provide a means to consider systems beyond the practical limits of experimental testing, such as a much broader range of particle sizes and packing configurations. In the process, fundamental contributions will be made in applied mechanics and computational science. These include: 1) a chemo-poro-elasticity based theory for the fracturing of particulate raft systems; and 2) multi-scale, coupled finite-element and molecular dynamics methods that can handle a range of time-scales, from the fast scales of particle interactions to the much slower scales of surfactant diffusion. These models and simulations will be used to study recent experiments in the dynamics of fracture of particulate rafts, focusing on the important roles of particle heterogeneity and surfactant injection.
这个项目的动机是最近的观察不断变化的裂缝网络在紧密包装系统的颗粒,或颗粒筏,与流体相互作用。 该奖项支持的研究重点是这些系统的计算模型和模拟。 模拟将使详细调查他们的行为,并帮助回答悬而未决的问题,如为什么看似微小的扰动颗粒包装引起显着不同的断裂模式。 紧密堆积的颗粒网络是一种理想的多孔介质,表面活性剂的注入是裂缝网络生长的驱动力。 流体流动和裂纹扩展之间的这种类型的耦合是许多技术相关问题的核心,包括水力压裂和腐蚀辅助压裂。 桌面实验是简单和成本有效的研究粒子系统的细节。 这项工作涉及到北卡罗来纳州的公立小学的外展活动,在那里将放映裂缝网络模拟和实验的电影。 这些课堂演示将作为一个起点,向学生介绍年轻时的基本编程概念。 该奖项支持的研究旨在使用模拟科学来确定颗粒填充,粒度分布和表面活性剂注入对颗粒系统中裂缝演化的影响。 模拟将提供一种方法来考虑超出实验测试的实际限制的系统,例如更广泛的颗粒尺寸和包装配置。 在此过程中,将在应用力学和计算科学作出基本贡献。 其中包括:1)用于颗粒筏系统的破裂的基于化学孔隙弹性的理论;以及2)多尺度、耦合的有限元和分子动力学方法,其可以处理一系列时间尺度,从颗粒相互作用的快速尺度到表面活性剂扩散的慢得多的尺度。 这些模型和模拟将被用来研究最近的实验中的颗粒筏断裂的动力学,专注于颗粒的非均匀性和表面活性剂注入的重要作用。

项目成果

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John Dolbow其他文献

Point Defects in Nematic Gels: The Case for Hedgehogs

John Dolbow的其他文献

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{{ truncateString('John Dolbow', 18)}}的其他基金

Collaborative Research: A Unified Theory of Crack Nucleation and Growth for Materials Subjected to Repetitive Surface Acoustic Waves and Dynamic Impacts
合作研究:重复表面声波和动态冲击下材料裂纹成核和扩展的统一理论
  • 批准号:
    2132551
  • 财政年份:
    2021
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Collaborative Research: Wettability Control on the Mechanics of Fracture in Granular and Porous Media
合作研究:颗粒和多孔介质断裂力学的润湿性控制
  • 批准号:
    1933367
  • 财政年份:
    2019
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Workshop/Collaborative Research: Computational Mechanics Vision and Future Challenges; Ann Arbor, Michigan; October 31 to November 1, 2019
研讨会/合作研究:计算力学愿景和未来挑战;
  • 批准号:
    1932410
  • 财政年份:
    2019
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Conference Support: 12th US National Congress on Computational Mechanics; Raleigh, North Carolina; July 2013
会议支持:第十二届美国计算力学全国大会;
  • 批准号:
    1261590
  • 财政年份:
    2013
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Symposium: 2010 Robert J. Melosh Medal Symposium; Duke University; Durham, North Carolina; April 2010
研讨会:2010 Robert J. Melosh 奖章研讨会;
  • 批准号:
    0964863
  • 财政年份:
    2010
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Collaborative Research: Membrane Nanodomains--Prediction and Detection
合作研究:膜纳米域——预测和检测
  • 批准号:
    0825839
  • 财政年份:
    2008
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Computational and Experimental Strategies for Investigating Failure in Emerging Soft-Wet Materials
研究新兴软湿材料失效的计算和实验策略
  • 批准号:
    0528119
  • 财政年份:
    2005
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
The Robert J. Melosh Symposium in Finite Element Analysis
Robert J. Melosh 有限元分析研讨会
  • 批准号:
    0501139
  • 财政年份:
    2005
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
Collaborative Research : Surface and Actuation Kinetics of Stimulus-Responsive Hydrogels
合作研究:刺激响应水凝胶的表面和驱动动力学
  • 批准号:
    0324459
  • 财政年份:
    2003
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant
GOALI/Collaborative Research: Thermomechanical Investigations of High Speed Machining of Aluminum
GOALI/合作研究:铝高速加工的热机械研究
  • 批准号:
    0223611
  • 财政年份:
    2002
  • 资助金额:
    $ 29万
  • 项目类别:
    Standard Grant

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高危老年人钠-葡萄糖协同转运蛋白 2 抑制剂治疗的骨折风险:基于人群的研究以确定相对安全性
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    2016
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