预测胶结颗粒材料在化学损伤（脱粘）过程中的弹性质
Predicting the Elastic Properties of a Cemented Granular Material during Chemical Damage (Debonding)
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中文总结 AI 辅助
本文提出数字岩石物理方法，结合离散元与相场-快速傅里叶变换连续模型，预测化学损伤下胶结颗粒材料的弹性质演化，建立软化规律。
中文摘要 AI 辅助
虽然地下储层成为应对全球变暖的关键要素，但这些系统代表了复杂的多物理场和多尺度问题。在氢气储存、二氧化碳封存或地热能回收过程中所考虑的流体注入，会改变多孔储层中流体的化学平衡。化学反应可诱发岩石基质的微观结构变化，导致材料弹性质降低，并可能引起沉降或应力重新分布。因此，建立预测性行为规律以描述化学损伤对弹性质的影响变得至关重要。鉴于通过实验估算化学损伤对力学性质影响的困难，本文提出了一种数字岩石物理方法。该数值均匀化方案用于比较两种不同类型的微观结构模型：第一种由离散元模型组成，而第二种采用连续描述。这种连续公式基于相场描述来预测受化学蚀变影响的微观结构演化，并利用快速傅里叶变换来估算材料的宏观性质。最后，这些框架建立了不同的软化规律，可作为胶结材料在风化过程中的本构要素。
英文摘要
While underground reservoirs emerge as essential elements to face global warming, these systems represent complex multi-physical and multiscale problems. The considered injection of fluids during hydrogen storage, carbon dioxide sequestration, or geothermal energy recovery involves a modification of the chemical equilibrium of the fluid in the porous reservoir. Chemical reactions can induce microstructural changes of the rock matrix, leading to a reduction of elastic properties of the material, and to potential settlement or stress redistribution. Consequently, it becomes pivotal to establish predictive behavior laws to describe the effect of chemical damage on elastic properties. Facing the difficulties to estimate experimentally the impact of chemical damage on mechanical properties, a Digital Rock Physics approach is proposed in this contribution. This numerical homogenization scheme is used to compare two distinct types of microstructure models: the first one consists in a Discrete Element Model, while the second one employs a continuous description. This continuous formulation is based on a Phase-Field description to predict the evolution of the microstructure subjected to chemical alterations and on the Fast Fourier Transform to estimate the macroscopic properties of the material. Finally, these frameworks establish different softening laws that can be used as constitutive ingredients for a cemented material during its weathering.
发表机构
- Navier, CNRS, Université Gustave Eiffel, ENPC, Institut Polytechnique de Paris（纳维耶实验室，法国国家科学研究中心，巴黎-塞纳河谷大学，国立巴黎高等路桥学校，巴黎理工学院）
- Multiphysics Geomechanics Lab, Duke University（多物理力学实验室，杜克大学）
- Institute of Mechanics, Materials and Civil Engineering, UCLouvain（力学、材料与土木工程研究所，天主教鲁汶大学）
机构由 AI 辅助整理，请以论文原文为准。
