Damage Creep Model and Application for Sandy Mudstone Considering the Effect of Immersion Deterioration

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-06-14 DOI:10.1093/jom/ufae026

Zhitao Ma, Wenhu Liu, Hanwen Xu, Yujia Huo, Yipeng Wang, Shunhai Li

引用次数: 0

Abstract

Aiming at the problem of performance degradation and large deformation of sandy mudstone after immersion in water, the compression test is carried out. The damage and deterioration law of strength and elastic modulus of immersed rock mass is analyzed, and the function relationship between rock damage variable and soaking time is obtained by fitting. Combined with Hoek-Brown criterion and Mohr-Coulomb criterion, the calculation method of instantaneous cohesion and instantaneous internal friction angle of damaged rock mass is derived based on tangent method, and the equivalent Mohr-Coulomb criterion which can effectively characterize the nonlinear strength characteristics of damaged rock mass is given. Based on the built-in creep model Cvisc of Flac3D, a damage creep model is given by introducing the damage factor and nonlinear strength criterion of immersed rock mass, which is more suitable for describing the creep characteristics of immersed sandy mudstone. The validity of the model is verified by comparing with the measured results.

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考虑浸水劣化效应的砂质泥岩损伤蠕变模型及应用

针对砂质泥岩浸水后的性能退化和大变形问题，进行了抗压试验。分析了浸水岩体强度和弹性模量的破坏和劣化规律，通过拟合得到了岩体破坏变量与浸水时间的函数关系。结合 Hoek-Brown 准则和 Mohr-Coulomb 准则，基于切线法推导出了受损岩体瞬时内聚力和瞬时内摩擦角的计算方法，并给出了能有效表征受损岩体非线性强度特征的等效 Mohr-Coulomb 准则。在 Flac3D 内置蠕变模型 Cvisc 的基础上，通过引入损伤因子和浸入岩体的非线性强度准则，给出了更适合描述砂质泥岩浸入蠕变特征的损伤蠕变模型。通过与测量结果比较，验证了该模型的有效性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.