[Oral Presentation]原位荷载下的三维颗粒体系力学性能研究

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

原位荷载下的三维颗粒体系力学性能研究

ID：298 Submission ID：358 View Protection：ATTENDEE Updated Time：2024-05-11 19:17:42 Hits：582 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

本文通过显微CT对三维橡胶颗粒体系进原位加载实验，分析了橡胶颗粒的弹性模量、应力-应变曲线等力学参数和孔隙率、逐层面孔率、球形度等结构参数，研究了橡胶颗粒体系的变形行为并给出了橡胶颗粒体系应力-应变的三个阶段以及应力与应变的关系和弹性模量的具体范围。结果表明：橡胶颗粒的应力-应变曲线要经历三个阶段，即应力缓慢期、应力快速增长期和应力极速增长期，其中应力缓慢期阶段内部孔隙较多，应力增加缓慢，应力快速增长期阶段应力将迅速增加，应力极速增长期阶段橡胶颗粒逐渐被压实；橡胶颗粒体系的孔隙率变化大，前期孔隙多，加载到后期几乎没有了孔隙，并且逐层面孔率的分布呈波浪式分布；应力与应变呈幂指数分布，应力缓慢期阶段橡胶颗粒体系弹性模量小且增长缓慢，应力快速增长期阶段弹性模量开始快速增加，应力极速增长期阶段弹性模量增加迅速，很小的应变都可以产生很大的应力，加载到后期颗粒体系弹性模量与连续体在同一个量级。

Keywords

三维颗粒,显微CT,力学性能

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