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Title: Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme

Abstract

The combined finite-discrete element method (FDEM) has been widely used for rock fracturing simulations. Conventionally, FDEM is realized using the intrinsic cohesive zone model (ICZM); however, it has the drawback of artificial compliance and high computational expense. As a complement, the extrinsic cohesive zone model (ECZM) is seen to be realized in FDEM recently, whereas the node splitting scheme utilized is cumbersome. Here, within the framework of ICZM-based FDEM, we propose a node binding scheme to efficiently bind the pre-discretized finite elements and thus guarantee the continuum behavior of materials in the elastic stage. The yield surfaces, controlled by ECZM, are dynamically embedded by invoking the pre-inserted cohesive elements. The effectiveness and efficiency of the proposed approach are validated and tested by performing a suite of numerical experiments. Compared with ICZM-based FDEM, the proposed approach can correctly capture material deformation and reduce the computation cost. In contrast to the existing ECZM-based FDEM, the proposed approach can overcome the frequent and complex element topology updating. Finally, this work provides a novel perspective that fully inherits the advantages of both ICZM and ECZM, but circumvents their shortcomings, which guarantees a more efficient and effective simulation of brittle material evolution from continuum tomore » discontinuum.« less

Authors:
 [1]; ORCiD logo [1];  [1]; ORCiD logo [2]; ORCiD logo [3]
  1. Southern University of Science and Technology (SUSTech), Shenzhen (China)
  2. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
  3. Swansea University (United Kingdom)
Publication Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); Shenzhen Science and Technology Program; Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology
OSTI Identifier:
1975055
Report Number(s):
LA-UR-23-21801
Journal ID: ISSN 0266-352X
Grant/Contract Number:  
89233218CNA000001
Resource Type:
Accepted Manuscript
Journal Name:
Computers and Geotechnics
Additional Journal Information:
Journal Volume: 159; Journal ID: ISSN 0266-352X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES; combined finite-discrete element method (FDEM); cohesive element; extrinsic cohesive zone model (ECZM); intrinsic cohesive zone model (ICZM); node binding scheme; rock fracturing simulations

Citation Formats

Cai, Weibing, Gao, Ke, Ai, Shugang, Wang, Min, and Feng, Yuntian T. Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme. United States: N. p., 2023. Web. doi:10.1016/j.compgeo.2023.105470.
Cai, Weibing, Gao, Ke, Ai, Shugang, Wang, Min, & Feng, Yuntian T. Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme. United States. https://doi.org/10.1016/j.compgeo.2023.105470
Cai, Weibing, Gao, Ke, Ai, Shugang, Wang, Min, and Feng, Yuntian T. Fri . "Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme". United States. https://doi.org/10.1016/j.compgeo.2023.105470. https://www.osti.gov/servlets/purl/1975055.
@article{osti_1975055,
title = {Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme},
author = {Cai, Weibing and Gao, Ke and Ai, Shugang and Wang, Min and Feng, Yuntian T.},
abstractNote = {The combined finite-discrete element method (FDEM) has been widely used for rock fracturing simulations. Conventionally, FDEM is realized using the intrinsic cohesive zone model (ICZM); however, it has the drawback of artificial compliance and high computational expense. As a complement, the extrinsic cohesive zone model (ECZM) is seen to be realized in FDEM recently, whereas the node splitting scheme utilized is cumbersome. Here, within the framework of ICZM-based FDEM, we propose a node binding scheme to efficiently bind the pre-discretized finite elements and thus guarantee the continuum behavior of materials in the elastic stage. The yield surfaces, controlled by ECZM, are dynamically embedded by invoking the pre-inserted cohesive elements. The effectiveness and efficiency of the proposed approach are validated and tested by performing a suite of numerical experiments. Compared with ICZM-based FDEM, the proposed approach can correctly capture material deformation and reduce the computation cost. In contrast to the existing ECZM-based FDEM, the proposed approach can overcome the frequent and complex element topology updating. Finally, this work provides a novel perspective that fully inherits the advantages of both ICZM and ECZM, but circumvents their shortcomings, which guarantees a more efficient and effective simulation of brittle material evolution from continuum to discontinuum.},
doi = {10.1016/j.compgeo.2023.105470},
journal = {Computers and Geotechnics},
number = ,
volume = 159,
place = {United States},
year = {Fri Apr 28 00:00:00 EDT 2023},
month = {Fri Apr 28 00:00:00 EDT 2023}
}

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