[Oral Presentation]尺寸效应和应变率对岩石张拉强度影响的模拟

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

尺寸效应和应变率对岩石张拉强度影响的模拟

ID：316 Submission ID：331 View Protection：ATTENDEE Updated Time：2024-05-20 10:38:24 Hits：700 Oral Presentation

Start Time：Pending （Asia/Shanghai）

Duration：Pending

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

No files

Abstract

尺寸效应和应变率是影响岩石抗拉强度的两个重要方面。本文采用随机分布的孔隙模拟岩石内部缺陷，生成直径为30 mm、40 和60 mm的圆形岩块。为研究岩块尺寸和加载速率对岩石抗拉强度的影响，不同尺寸岩块的孔隙含量及孔隙分布的不规则度均相同。对所有岩块进行应变率为0.1、1.0、10.0、100.0和500.0 s^-1的巴西劈裂试验模拟。模拟结果表明：（1）岩石的抗拉强度随着应变率的增加而增大；（2）应变率对岩石抗拉强度的增强效应随着岩石尺寸的增加而增大；（3）存在一个临界应变率，使岩石抗拉强度的尺寸效应规律发生转变，且在该应变率下，岩石抗拉强度的尺寸效应消失。该研究成果可为岩石动态强度特性和尺寸效应研究提供参考。

Keywords

抗拉强度；尺寸效应；应变率；孔隙分布的不规则度

Speaker

邵晓泉

东北大学；沈阳大学

Submission Author

邵晓泉东北大学；沈阳大学

胡舫瑞 3. 辽宁省自然资源事务服务中心辽宁省地质环境监测总站

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