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

Cai，Weibing1; Gao，Ke1,2; Ai，Shugang1; Wang，Min3; Feng，Y. T.4

2023-07-01

10.1016/j.compgeo.2023.105470

Computers and Geotechnics   影响因子和分区

0266-352X

1873-7633

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. 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.

Cohesive element Combined finite-discrete element method (FDEM) Extrinsic cohesive zone model (ECZM) Intrinsic cohesive zone model (ICZM) Node binding scheme Rock fracturing simulations

SCI ; EI

英语

第一 ; 通讯

Shenzhen Science and Technology Program[JCYJ20220530113612028] ; Guangdong Provincial Key Laboratory of Geophysical High -resolution Imaging Technology[2022B1212010002]

Computer Science ; Engineering ; Geology

Computer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary

WOS:000990010400001

ELSEVIER SCI LTD

20231714024558

Materials Science:951

COMPUTER SCIENCE

2-s2.0-85153566118

Scopus

1.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.Guangdong Provincial Key Laboratory of Geophysical High-resolution Imaging Technology,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
3.T-3 Fluid Dynamics and Solid Mechanics Group,Theoretical Division,Los Alamos National Laboratory,Los Alamos,87545,United States
4.Zienkiewicz Centre for Computational Engineering,Faculty of Science and Engineering,Swansea University,Swansea,Wales, SA1 8EP,United Kingdom

Cai，Weibing,Gao，Ke,Ai，Shugang,et al. Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme[J]. Computers and Geotechnics,2023,159.

Cai，Weibing,Gao，Ke,Ai，Shugang,Wang，Min,&Feng，Y. T..(2023).Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme.Computers and Geotechnics,159.

Cai，Weibing,et al."Implementation of extrinsic cohesive zone model (ECZM) in 2D finite-discrete element method (FDEM) using node binding scheme".Computers and Geotechnics 159(2023).