Transparent analysis of compression damage propagation of freeze-thaw rock based on CT-DVC

IF 3.8 2区工程技术 Q1 ENGINEERING, CIVIL

Cold Regions Science and Technology Pub Date : 2025-06-28 DOI:10.1016/j.coldregions.2025.104593

Hui Liu , Mengjie Liu , Gengshe Yang , Yanjun Shen , Bo Liang , Xiao Ding , Xinyue Dai , Minkai Zhu , Runqi Wang

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引用次数: 0

Abstract

Observing and quantifying the discontinuous structural evolution of rocks under thermo-mechanical loading remains a key challenge in cold region rock mechanics. CT real-time scanning of freeze-thaw sandstone under coupled loading captured 3D digital images of damage structures during uniaxial compression. A local 3D digital volume correlation (DVC) method with the Inverse Compositional Gauss-Newton (IC-GN) algorithm enabled non-contact measurement of internal deformations during compression failure. Full-field 3D strain distributions and damage characteristics were quantified under thermo-mechanical conditions. The method quantitatively visualized internal damage deformation, showing that the sandstone's meso-structure provides an effective DVC carrier. IC-GN-based analysis revealed that macro-damage propagates along pre-existing meso-damage paths under compressive loading, with initial damage structures dictating crack propagation directions and spatial distribution patterns at failure. As loading intensifies, localized deformation zones progressively coalesced with failure regions, while strain field distribution correlates consistently with crack morphology during sandstones rupture. The peak porosity of rock specimens at failure progressively rises under repeated freeze-thaw cycles. This research advances transparent analysis of discontinuous structures and multi-physical field effects, offering insights for frost damage mitigation in cold region engineering.

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基于CT-DVC的冻融岩石压缩损伤传播透明分析

观察和量化岩石在热-力载荷作用下的不连续构造演化是寒区岩石力学研究的一个重要课题。对耦合加载下冻融砂岩进行CT实时扫描，获取单轴压缩损伤结构的三维数字图像。基于逆成分高斯-牛顿（IC-GN）算法的局部三维数字体积相关（DVC）方法实现了压缩失效过程中内部变形的非接触测量。在热-力学条件下，对三维应变分布和损伤特征进行了量化。该方法定量可视化了砂岩内部损伤变形，表明砂岩细观结构是有效的DVC载体。基于ic - gn的分析表明，在压缩载荷作用下，宏观损伤沿着预先存在的细观损伤路径扩展，初始损伤结构决定了破坏时裂纹的扩展方向和空间分布模式。随着加载强度的增大，局部变形区与破坏区逐渐合并，而砂岩破裂时的应变场分布与裂纹形态一致。在反复冻融循环作用下，岩石试样破坏时孔隙率峰值逐渐升高。该研究推进了不连续结构和多物理场效应的透明分析，为寒冷地区工程中的霜冻损害缓解提供了见解。

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来源期刊

Cold Regions Science and Technology 工程技术-地球科学综合

CiteScore

7.40

自引率

12.20%

发文量

209

审稿时长

4.9 months

期刊介绍： Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.