[Oral Presentation]可破碎颗粒材料离散元建模中的三维单元分离法

Organized By

Hohai University

Monash University

Co-organized by

Southeast University

Jiangxi University of Science and Technology

Northeast University

DUT-BSU Scientific Research and Innovation Center

Suzhou University of Science and Technology

State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment

Sponsoring agency

KELI SDEM Software (Dalian) Co., Ltd.

Sugon Smart Computing Information Technology Co., Ltd.

Beijing Paratera Technology Co., Ltd.

Simpop Information Technology Co., Ltd.

Important Dates

Conference Announcement

December 2023, release First Round Announcement
Abstract Submission Deadline
March 31^th, 2024
Paper Submission Deadline
April 30^th, 2024
Registration
From January 1^st, 2024
Conference Schedule
May 31^st (Friday), 2024 On-Site Registration
June 1^st to 3^rd, 2024 Conference

可破碎颗粒材料离散元建模中的三维单元分离法

ID：15 Submission ID：16 View Protection：ATTENDEE Updated Time：2024-04-09 21:57:10 Hits：438 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

Session：[No Session] » [No Session Block]

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Abstract

颗粒破碎引起的颗粒尺寸分布变化和颗粒位置重排是导致颗粒材料物理力学性质发生改变的重要原因。为有效模拟可破碎颗粒材料的宏细观力学行为，本文发展了基于多边形网格离散元方法的单元分离模型，并提出了针对非规则颗粒破碎分割问题的三维子集分离法。在该模型中，一旦颗粒内部的应力状态满足破坏准则，所提出的三维子集分离法将被用于切割并分离该任意形态的多面体颗粒。与同样基于离散元方法的粘结破碎模型和片段替换模型相比，单元分离模型对子代颗粒的形状、尺寸、数量均不加任何限制，子代颗粒在父代颗粒破坏瞬间所处位置上直接生成，并且在整个破化过程中颗粒材料的质量、体积均是守恒的。因此单元分离模型不仅可以较为真实的反应实际的子代颗粒的形状、粒径分布，还避免了片段替换后子代颗粒几何约束不现实的问题。

Keywords

离散元方法,非规则颗粒,颗粒破碎,可破碎颗粒材料,单元分离模型

Speaker

乔婷

大连理工大学

Submission Author

乔婷大连理工大学

季顺迎大连理工大学

Sponsored By

Hohai University

Panel of Computational Mechanics on Granular Materials, Working Party of Computational Mechanics, Chinese Society of Theoretical and Applied Mechanics

Jiangsu Society of Theoretical and Applied Mechanics