[Oral Presentation]团簇胶结型粉质能源土不同应力路径三轴试验离散元分析

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

团簇胶结型粉质能源土不同应力路径三轴试验离散元分析

ID：77 Submission ID：226 View Protection：ATTENDEE Updated Time：2024-04-09 22:37:25 Hits：366 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

含天然气水合物土体可称为能源土，水合物在能源土孔隙中的填充使得土的结构与力学性质发生改变，通过将水合物颗粒随机填充到粉质骨架中，并对粉粒-水合物和水合物-水合物接触施加胶结模型，考虑细粒间的范德华力作用，建立了粉质能源土离散元模型。通过对数值试样进行不同应力路径加载仿真，分析了粉质能源土的宏微观力学性质。结果表明：在常规三轴、等p和减p三轴试验中，不同应力路径加载最终到达相同的临界强度线；水合物的应力承载率在相同的变化趋势下到达相同的稳定值，且偏应力主要由粉粒骨架承担。在等应力比加载试验中，随应力比q/p增大，试样由压缩控制型逐渐转为剪切控制型，应力应变关系由上翘转为应变软化，相同轴向应变下胶结破坏量减小，水合物的承载率稳定值增大，偏应力由粉粒骨架和粉粒-水合物共同承担。

Keywords

离散单元法,粉质能源土,三轴试验,水合物承载率

Speaker

刘笑玲

中国民航大学

Submission Author

刘笑玲中国民航大学

李涛中国民航大学

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