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Extrinsic Cohesive Zone Modelに基づくハイブリッドFEM-DEMを用いた岩石の3次元動的破壊過程解析法の開発に関する基礎的検討

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Title: Extrinsic Cohesive Zone Modelに基づくハイブリッドFEM-DEMを用いた岩石の3次元動的破壊過程解析法の開発に関する基礎的検討
Other Titles: Development of a Numerical Simulator for 3-D Dynamic Fracture Process Analysis of Rocks Based on Hybrid FEM-DEM Using Extrinsic Cohesive Zone Model
Authors: 福田, 大祐1 Browse this author →KAKEN DB
二瓶, 恵理菜2 Browse this author
趙, 祥鎬3 Browse this author
呉, 世旭4 Browse this author
奈良, 禎太5 Browse this author →KAKEN DB
児玉, 淳一6 Browse this author →KAKEN DB
藤井, 義明7 Browse this author →KAKEN DB
Authors(alt): FUKUDA, Daisuke1
NIHEI, Erina2
CHO, Sang-Ho3
OH, Sewook4
NARA, Yoshitaka5
KODAMA, Jun-ichi6
FUJII, Yoshiaki7
Keywords: Rock
3-D dynamic fracture process
Numerical simulation, Combined finite-discrete element method (FDEM)
Extrinsic cohesive zone model
Issue Date: 20-Mar-2020
Publisher: 公益社団法人 日本材料学会
Journal Title: 材料
Journal Title(alt): Journal of the Society of Materials Science, Japan
Volume: 69
Issue: 3
Start Page: 228
End Page: 235
Publisher DOI: 10.2472/jsms.69.228
Abstract: The combined finite-discrete element method (FDEM) has attracted significant attention for numerical simulations of complex fracture process of rock-like materials as one of the promising hybrid methods. The mainstream of FDEM simulators developed to date is based on the intrinsic cohesive zone model (ICZM) in which cohesive elements are inserted into all the boundaries of continuum solid elements at the onset of simulations and an artificial elastic behavior must be incorporated to model the intact deformation of rock-like materials. However, the effect of introduction of the artificial elastic behavior on the precision of intact stress wave propagation has not been discussed in previous literatures and this paper discusses this issue. As an alternative for the ICZM-based FDEM, we apply the FDEM based on the extrinsic cohesive zone model (ECZM). An advantage of the ECZM-based FDEM is presented through the 3-dimentional (3-D) numerical modelling of dynamic tension test. In addition, the effect of considering the anisotropy of wave propagation in granite, which has been neglected in all the previous works using FDEM, is investigated through the ECZM-based 3-D FDEM simulation of dynamic Brazilian test with a split Hopkinson pressure bar apparatus. Through the presented numerical simulations, it can be concluded that the ECZM-based FDEM may be an alternative for numerical simulations of complex dynamic fracture process of rock-like materials instead of the ICZM-based FDEM.
Rights: ©公益社団法人日本材料学会
©The Society of Materials Science, Japan
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藤井 義明

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