Mechanical behavior of rock under uniaxial tension:Insights from energy storage and dissipation

扫码查看

原文链接

万方数据
维普

外文摘要：Many rock engineering projects show that the growth of tensile cracks is often an important cause of engineering disasters,and the mechanical behavior of rocks is essentially the transmission,storage,dissipation and release of energy.To investigate the tensile behavior of rock from the perspective of energy,uniaxial tension tests(UTTs)and uniaxial compression tests(UCTs)were carried out on three typical rocks(granite,sandstone and marble).Different unloading points were set before the peak stress to separate elastic energy and dissipated energy.The input energy density ut,elastic energy density ue,and dissipated energy density ud at each unloading point were calculated by integrating stress-strain curves.The results show that there is a strong linear relationship between the three energy parame-ters and the square of the unloading stress in UCT,but this linear relationship is weaker in UTT.The ue and ud increase linearly with the increase in ut in UCT and UTT.Based on the phenomenon that ue and ud increase linearly with ut,the applicability of Wpet index in UTT was proved and the relative energy storage capacity and absolute energy distribution characteristics of three rocks in UCT and UTT were evaluated.The tensile behavior of marble and sandstone in UTT can be divided into two stages vaguely according to the energy distribution,but granite is not the case.In addition,based on dissipated energy,the damage evolution of three types of rocks in UCT and UTT was discussed.This study provides some new insights for understanding the tensile behavior of rock.

外文关键词：

Uniaxial tensionEnergy densityMechanical behaviorEnergy storage coefficientEnergy dissipation coefficient

作者：

Guanshuang Tan、Chunde Ma、Junjie Zhang、Wenyuan Yang、Guiyin Zhang、Zihao Kang

展开 >

作者单位：

School of Resources and Safety Engineering,Central South University,Changsha,410083,China

基金：

National Natural Science Foundation of ChinaNational Natural Science Foundation of Hunan Province of ChinaFundamental Research Funds for the Central Universities of Central South University

项目编号：

520743522023JJ306802024ZZTS0423

出版年：

2024

DOI：

10.1016/j.jrmge.2023.12.022

岩石力学与岩土工程学报(英文版)

中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD

影响因子：0.404

ISSN：1674-7755

年,卷(期)：2024.16(7)