Peridynamics simulation and influence law analysis considering rock microscopic properties

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-01-01 DOI:10.1615/intjmultcompeng.2024049902

Haoran Wang, Chengchao Guo, Wei Sun, Haibo Wang, Xiaodong Yang, Fuming Wang

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Abstract

The microscopic properties of rocks control the macroscopic mechanical properties and fracture behavior of rocks. Existing studies on the mechanical properties of rocks have focused on treating rock materials as homogeneous or defining material properties based on Weibull random distributions, which are unable to take into account the mineralogical components and porosity characteristics of rocks. In this paper, based on the theory of bonded near-field dynamics (Peridynamics, PD), the Knuth-Durstenfeld shuffling algorithm is introduced to disrupt the mineral distribution and pore parameters, and a near-field dynamics simulation method is proposed to consider the microscopic properties of rocks. The accuracy of the proposed method is verified based on SEM tests, XRD tests and mechanical property tests of sandy mudstone and fine-grained sandstone. Further, computational analyses were carried out for the rock models under different porosities. The results indicate that porosity has a significant impact on the failure mechanism of the model.

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考虑岩石微观特性的围岩动力学模拟和影响规律分析

岩石的微观特性控制着岩石的宏观力学特性和断裂行为。现有的岩石力学性能研究主要是将岩石材料视为均质材料或根据威布尔随机分布定义材料性能，无法考虑岩石的矿物成分和孔隙特征。本文以粘结近场动力学（Peridynamics，PD）理论为基础，引入 Knuth-Durstenfeld 洗牌算法来扰乱矿物分布和孔隙参数，提出了一种考虑岩石微观性质的近场动力学模拟方法。基于对砂质泥岩和细粒砂岩的扫描电镜测试、XRD 测试和力学性能测试，验证了所提方法的准确性。此外，还对不同孔隙率下的岩石模型进行了计算分析。结果表明，孔隙率对模型的破坏机制有重大影响。

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.