[Oral Presentation]考虑颗粒形状和加载路径组合效应下颗粒材料强接触网络中最大簇的DEM研究

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

考虑颗粒形状和加载路径组合效应下颗粒材料强接触网络中最大簇的DEM研究

ID：104 Submission ID：30 View Protection：ATTENDEE Updated Time：2024-04-10 17:09:47 Hits：377 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

岩土颗粒材料在荷载作用下内部形成的接触力网络可以被划分为强接触子网络和弱接触子网络。强接触网络已被学者们证明为是传递接触力的主要结构，而强接触网络中的最大簇的变化能够反映出整体强接触网络的拓扑特征变化，其作为一个连通的颗粒体系并且能够贯穿各个边界，应为一个重要的传力结构。本研究主要针对最大簇在强接触网络中起的重要作用，同时考虑应力路径以及颗粒形状的影响，进行了一系列考虑颗粒形状以及不同中主应力系数b的真三轴试验模拟，并从宏观和微观的角度对其结果进行了分析。结果表明颗粒形状以及加载路径都会影响试样的剪切强度，在微观上体现为对其拓扑产生影响。本研究采用阈值ζ来划分不同程度的强弱接触网络，并通过分析最大簇的复杂网络参数从而获得临界阈值，进一步对临界阈值前的最大簇展开了研究。结果发现临界阈值前强网络内的最大簇仅占据了整体接触网络中一小部分的颗粒和接触，但传递了接近一半的大主应力。

Keywords

颗粒材料，离散单元法，颗粒形状，强接触网络

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