[Poster Presentation]复杂网络揭示颗粒材料不排水剪切下的结构演化

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

复杂网络揭示颗粒材料不排水剪切下的结构演化

ID：78 Submission ID：183 View Protection：ATTENDEE Updated Time：2024-04-09 22:37:32 Hits：365 Poster Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

静态液化是一种特殊的分散性失稳行为，被认为是边坡失稳和堆石坝垮坝等自然灾害或工程事故的成因之一。开展一系列DEM不排水剪切试验，再现颗粒材料静态液化现象，并通过Hill二阶功准则识别分散性失稳。复杂网络工具被用于量化颗粒材料接触网络，验证了配位数、局部效率等网络指标对静态液化的准确捕获。网络指标与宏观应力之间存在明显的双阶段发展模式，即在临近液化时，接触网络加速崩塌。根据颗粒主应力大小，进一步划分了强、弱和强弱接触子网络，发生失稳之后，弱接触网络和强弱接触网络率先发生破坏，而强接触网络则相对稳定。进一步量化子网络与宏观应力之间的关系，发现弱接触网络率先进入加速发展模式，其次是强弱接触网络。本研究从微观和介观层面揭示了静态液化的成因，为模拟和预测重大灾害提供新的见解。

Keywords

颗粒材料，静态液化，复杂网络

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