一个高效的损伤-可塑性DEM接触模型,用于高度多孔的岩石
Jinhui Zheng1, Matteo Oryem Ciantia1,2
1School of Science and Engineering, University of Dundee, Dundee, UK.
Rock mechanics and rock engineering
|May 5, 2025
概括
一个新的离散元件方法 (DEM) 模型准确地模拟了多孔软岩的行为,这对于堆透研究至关重要. 这种高效且可扩展的模型捕捉了微观损伤和宏观反应,例如石.
科学领域:
- 计算地质力学计算地质力学
- 材料科学 是一种材料科学.
- 数字建模 数字建模
背景情况:
- 精确模拟多孔软岩的行为对于地质工程至关重要,特别是在堆穿透问题上.
- 现有的模型往往难以捕捉这些材料宏观反应的复杂微观机制.
- 对于模拟大规模地质技术场景而言,需要有效和可扩展的数值方法至关重要.
研究的目的:
- 开发和验证一种新的离散元素方法 (DEM) 模型,用于模拟多孔软岩的行为.
- 为了增强现实主义,将微尺度损伤和塑料变形纳入宏观元素框架中.
- 评估模型的效率,可扩展性和对堆透场景的预测能力.
主要方法:
- 开发了一种新的离散元素方法 (DEM) 模型,利用宏观元素理论和微尺度塑料变形损伤定律.
- 采用远场相互作用框架来处理高孔径,不规则的颗粒和键片段,允许不重叠的粒子传递力.
- 使用结合的DEM-Finite差分方法 (FDM) 框架来提高3D数值模拟的效率.
主要成果:
- 该模型经过校准并成功复制了马斯特里赫特石的行为,在临界状态理论框架内探索了它的机械反应.
- 对圆末端透测试的模拟显示实验和数值结果之间很好地匹配,验证了该模型的预测能力.
- 结合的DEM-FDM方法在3D模拟中显示出显著的效率提升.
结论:
- 提出的DEM模型有效地复制了多孔软岩的行为,包括复杂的微观尺度现象.
- 该模型的效率和可扩展性使其适合模拟大规模的地质技术问题,如穿透.
- 这种新的方法为控制软岩/结构相互作用中的宏观反应的微观机制提供了洞察力.
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