[Oral Presentation]不均匀性对颗粒材料应力-力-组构关系的影响研究

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

不均匀性对颗粒材料应力-力-组构关系的影响研究

ID：162 Submission ID：225 View Protection：ATTENDEE Updated Time：2024-04-10 17:22:25 Hits：412 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

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Abstract

应力-力-组构（SFF）关系将颗粒体宏观抗剪强度与细观组构异性相关联，为揭示各影响因素对颗粒体宏观抗剪强度相应的细观组构机制奠定了基础。然而，经典的SFF关系基于接触颗粒的粒径和接触力无关假定，是否适用于不同的不均匀性颗粒体仍需进一步研究。因此，本文依据离散元数值模拟，对不同不均匀性的连续级配和断级配颗粒材料开展三轴试验，研究了不均匀性对SFF关系的影响。结果表明：随着不均匀性逐渐增加，接触力和粒径在空间各方向上的相关性越强，导致真实抗剪强度与经典SFF关系获得的抗剪强度偏差逐渐增加，表明经典SFF关系不适用于不均匀性较大的颗粒体。为解决该问题，引入一个与不均匀性相关的无量纲参数对经典 SFF关系进行修正。经验证，修正后SFF关系可适用于不同不均匀性的颗粒体。

Keywords

颗粒材料，离散元建模，应力-力-组构关系，各向异性，抗剪强度

Speaker

王飞

广西大学

Submission Author

王飞广西大学

龚健广西大学

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