岩石中的残余应力:基于连续体的微机械数值建模的启示

IF 3.7 2区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2024-10-30 DOI:10.1007/s10064-024-03981-7
M. Trzop, A. G. Corkum
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引用次数: 0

摘要

众所周知,由于材料的形成过程,晶体材料的微观结构中存在残余应力。研究证明了残余应力的存在及其影响,并将其应用于玻璃和金属材料的工程中。在岩石工程领域,近几十年来有关该主题的研究成果有限。有关岩石中残余应力的文献介绍了其形成机制、大小和观察到的影响。数值建模技术,如基于晶粒的建模,可用于深入了解岩石中的残余应力。利用 RS2 的 Voronoi 网络创建了微机械数值模型,以研究包含残余应力的岩石模拟。利用简化的建模序列,在假定的岩石矿物结构中创建了残余应力场(微应力),并模拟了三种主要情况。第一种情况是探索残余应力与压缩试验裂缝闭合应变之间的潜在关系。其次,研究了残余应力重新分布导致样品损坏的可能性,以及残余应力对切口扩展的影响。最后,研究了含有残余应力的岩块圆形开挖周围的预期位移。数值研究表明,残余应力可能会对岩石行为产生不可忽视的实际影响。这包括裂缝开裂/闭合、样品损坏和岩石位移的影响,这些影响目前尚未考虑在内,对岩石工程项目具有重要意义。
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Residual stress in rock: insights from continuum-based micromechanical numerical modelling

Residual stresses are known to exist within the microstructure of crystalline materials as a result of material formation processes. Research has proven their existence and implications, and engineering applications have been derived for glass and metal materials. In the rock engineering field, limited research has been published on the topic in recent decades. Literature on residual stress in rock is presented regarding the formation mechanisms, magnitudes, and observed implications. Numerical modelling techniques, such as Grain-Based Modelling, can be used to gain insight into residual stresses in rock. Micromechanical numerical models were created using RS2’s Voronoi network to study rock simulations that include residual stress. Using a simplified modelling sequence, a residual stress field (microstresses) was created within a hypothetical rock mineral structure and three main scenarios were simulated. The first explores a potential relationship between residual stress and compression test crack closure strain. Secondly, the possibility of sample damage due to residual stress redistribution and the influence of residual stresses on the propagation of a slot cut was investigated. Finally, the anticipated displacements around a circular excavation in a rock block containing residual stresses were examined. The numerical investigations suggest that residual stress may have real and non-negligible influence on rock behaviour. This includes the effects of crack opening/closure, sample damage, and rock displacements that are not currently accounted for with implications for rock engineering projects.

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来源期刊
Bulletin of Engineering Geology and the Environment
Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合
CiteScore
7.10
自引率
11.90%
发文量
445
审稿时长
4.1 months
期刊介绍: Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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