Multiscale modelling of hydro-mechanical processes in geomaterials with evolving weak/strong discontinuities

具有不断演变的弱/强不连续性的岩土材料中的水力力学过程的多尺度建模

• 批准号: RGPIN-2017-06322
• 负责人: Guo, Ning
• 金额: $ 1.89万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=636197
• 关键词: Multiscale; modelling; hydro; mechanical; processes

Geomaterials underpin the performance of key infrastructures in civil/mining engineering and energy extraction industries. Accurate modelling and predicting the mechanical behaviours of geomaterials are therefore vitally important. As typical granular materials, geomaterials are essentially multiscale and multiphase. Their macroscopic responses are decisively dictated by the underlying interactions among the constituent particles and their microstructures. Meanwhile, the pores of geomaterials are often fully or partially saturated with fluids like water. The coupling between the deformation of the solid matrix and the fluid flow leads to many complex yet intriguing phenomena including shear banding and fracturing. Due to the material nonlinearity and the coupling effects, as well as the lack of a robust numerical tool to account for both multiscale and multiphase characters, it remains a challenging task to accurately model and characterise geomaterials.

岩土材料支撑着土木/采矿工程和能源开采行业关键基础设施的性能。因此，准确建模和预测岩土材料的力学行为至关重要。作为典型的粒状材料，岩土材料本质上是多尺度、多相的。它们的宏观响应决定性地取决于组成颗粒及其微观结构之间的潜在相互作用。同时，岩土材料的孔隙通常完全或部分被水等流体饱和。固体基质变形和流体流动之间的耦合导致了许多复杂但有趣的现象，包括剪切带和破裂。由于材料的非线性和耦合效应，以及缺乏强大的数值工具来解释多尺度和多相特征，准确地建模和表征岩土材料仍然是一项具有挑战性的任务。