Discrete modeling of acoustic emission and fracture process zone in quasi-brittle rocks

IF 2.8 3区工程技术 Q1 MATHEMATICS, INTERDISCIPLINARY APPLICATIONS

Computational Particle Mechanics Pub Date : 2025-03-10 DOI:10.1007/s40571-025-00922-3

Yifei Ma

{"title":"Discrete modeling of acoustic emission and fracture process zone in quasi-brittle rocks","authors":"Yifei Ma","doi":"10.1007/s40571-025-00922-3","DOIUrl":null,"url":null,"abstract":"<div><p>Acoustic emission (AE) testing serves as a widely employed non-destructive technique for examining the behaviors of rocks under stress, with a particular focus on understanding the characteristics of the fracture process zone (FPZ). This paper investigates this phenomenon by conducting a numerical study using the two-dimensional discrete element method to simulate a three-point bending test with a center notch. An innovative displacement-softening contact law is incorporated to monitor the energy dissipation during bond damage and breakage. Additionally, the paper investigates the variation of AE energy levels corresponding to different loading stages, shedding light on intrinsic FPZ properties. The study further endeavors to categorize AE events based on their energy levels, showcasing the potential of the proposed model in capturing various FPZ characteristics. The simulation results affirm the model’s capability to represent diverse FPZ behaviors, providing valuable insights for the calibration of numerical models for quasi-brittle rocks. This study lays the groundwork for potential advancements in predicting the behavior of rock formations by offering essential numerical evidence supporting the utilization of the proposed model.</p></div>","PeriodicalId":524,"journal":{"name":"Computational Particle Mechanics","volume":"12 4","pages":"2341 - 2355"},"PeriodicalIF":2.8000,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computational Particle Mechanics","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s40571-025-00922-3","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}

引用次数: 0

Abstract

Acoustic emission (AE) testing serves as a widely employed non-destructive technique for examining the behaviors of rocks under stress, with a particular focus on understanding the characteristics of the fracture process zone (FPZ). This paper investigates this phenomenon by conducting a numerical study using the two-dimensional discrete element method to simulate a three-point bending test with a center notch. An innovative displacement-softening contact law is incorporated to monitor the energy dissipation during bond damage and breakage. Additionally, the paper investigates the variation of AE energy levels corresponding to different loading stages, shedding light on intrinsic FPZ properties. The study further endeavors to categorize AE events based on their energy levels, showcasing the potential of the proposed model in capturing various FPZ characteristics. The simulation results affirm the model’s capability to represent diverse FPZ behaviors, providing valuable insights for the calibration of numerical models for quasi-brittle rocks. This study lays the groundwork for potential advancements in predicting the behavior of rock formations by offering essential numerical evidence supporting the utilization of the proposed model.

Abstract Image

查看原文本刊更多论文

准脆性岩石声发射与破裂过程带的离散建模

声发射（AE）测试是一种广泛应用的无损检测技术，用于检测岩石在应力作用下的行为，尤其侧重于了解破裂过程带（FPZ）的特征。本文采用二维离散元法模拟带中心缺口的三点弯曲试验，对这一现象进行了数值研究。采用了一种新颖的位移软化接触法来监测粘结损伤和断裂过程中的能量耗散。此外，本文还研究了不同加载阶段声发射能级的变化规律，揭示了材料的固有FPZ特性。该研究进一步尝试根据声发射事件的能级对其进行分类，展示了所提出的模型在捕获各种FPZ特征方面的潜力。模拟结果证实了该模型能够代表不同的FPZ行为，为准脆性岩石数值模型的校准提供了有价值的见解。本研究通过提供必要的数值证据支持所提出的模型的使用，为预测岩层行为的潜在进展奠定了基础。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Computational Particle Mechanics Mathematics-Computational Mathematics

CiteScore

5.70

自引率

9.10%

发文量

期刊介绍： GENERAL OBJECTIVES: Computational Particle Mechanics (CPM) is a quarterly journal with the goal of publishing full-length original articles addressing the modeling and simulation of systems involving particles and particle methods. The goal is to enhance communication among researchers in the applied sciences who use "particles'''' in one form or another in their research. SPECIFIC OBJECTIVES: Particle-based materials and numerical methods have become wide-spread in the natural and applied sciences, engineering, biology. The term "particle methods/mechanics'''' has now come to imply several different things to researchers in the 21st century, including: (a) Particles as a physical unit in granular media, particulate ﬂows, plasmas, swarms, etc., (b) Particles representing material phases in continua at the meso-, micro-and nano-scale and (c) Particles as a discretization unit in continua and discontinua in numerical methods such as Discrete Element Methods (DEM), Particle Finite Element Methods (PFEM), Molecular Dynamics (MD), and Smoothed Particle Hydrodynamics (SPH), to name a few.