Influence of strain rate on progressive failure process and characteristic stresses of red sandstone

WANG Hong-liang; FAN Peng-xian; WANG Ming-yang; LI Wen-pei; QIAN Yue-hong

English Version Journal Login

您当前的位置：

首页 >

文章列表页 >

Influence of strain rate on progressive failure process and characteristic stresses of red sandstone

更新时间：2026-06-25

- Influence of strain rate on progressive failure process and characteristic stresses of red sandstone
- Vol. 32, Issue 5, (2011)
- 作者机构：
  
  1. 解放军理工大学工程兵工程学院,南京,210007
  2. 中国矿业大学深部岩土力学与地下工程国家重点试验室,江苏,徐州,221008
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU451
- Online First：23 September 2011，
  
  Published：2011
- 稿件说明：
移动端阅览
WANG Hong-liang, FAN Peng-xian, WANG Ming-yang, et al. Influence of strain rate on progressive failure process and characteristic stresses of red sandstone[J]. 2011, 32(5).
DOI：

WANG Hong-liang, FAN Peng-xian, WANG Ming-yang, et al. Influence of strain rate on progressive failure process and characteristic stresses of red sandstone[J]. 2011, 32(5). DOI：

摘要

为了深入研究脆性岩石的渐进破坏过程，利用RMT-150C型岩石力学试验系统对产自鲁南地区的一种红砂岩进行了系统的力学性质试验研究，得出该类型砂岩试样在不同应变率条件下的力学表现。将试件的渐进破坏过程通过特征应力分为裂纹闭合阶段、线弹性变形阶段、裂纹起裂和稳定扩展阶段以及裂纹不稳定扩展阶段，通过对应力-应变曲线、轴向变形刚度、体积应变曲线和裂纹体积应变等数据的分析，以及采用动点回归技术确定了试样的起裂应力和致损应力，并进一步研究了该类红砂岩的渐进破坏过程及红砂岩峰值强度、起裂应力等参数和应变率之间的关系。试验结果表明，随着应变率的增加，红砂岩试样的峰值强度先降低后提高，起裂应力及致损应力与峰值强度的比值均有所降低。分析了红砂岩峰值强度变化的物理机制并给出了解释，研究了应变率对红砂岩渐进破坏过程的影响

Abstract

In order to investigate the progressive failure process of brittle rock

the mechanical properties of red sandstone from south area of Shandong province are studied by the RMT-150C rock mechanical experimental system. The stress-strain curves of samples under different strain rates are recorded. The deformation and progressive failure process of rock samples is divided into several stages

including crack closure stage

linear elastic deformation stage

crack initiation and stable crack growth stage and unstable crack growth stage. Then the crack initial stresses and crack damage stresses are determined by the moving point technique according to the data of stress-strain curves and other deduced data. The influence of strain rate on the ultimate critical strength

the crack initial stress and the crack damage stress are also investigated. The results show that the ultimate critical strength first decreases and then increases as the strain rate increases; and the rate of crack initial stress and crack damage with the ultimate critical strength decreases. The mechanism of the experimental results are analyzed and explained by the stress concentration model of rock with nonuniformities. And the influence of strain rate on the progressive failure process is studied.

关键词

Keywords

references

Views

2276

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

水-动力耦合作用下红砂岩变形破坏与能耗分析

Experimental study of uniaxial compressive deformation and strength of frozen silty sand under different initial ice contents

Experimental study of mechanical characteristics of coal-serial mudstone under different temperatures

Experimental research of sandstone dynamic strength criterion under different strain rates

Uniaxial compression tests on mechanical properties of rock mass similar material with cross-cracks

Related Author

DU Jin-fei

DU Yu-xiang

JIA Yong-sheng

SUN Jin-shan

YAO Ying-kang

XIE Quan-min

FAN Kun-hui

DU Hai-min

Related Institution

State Key Laboratory of Precision Blasting, Jianghan University

School of Digital Construction and Blasting Engineering, Jianghan University

Hubei Provincial Key Laboratory of Blasting Engineering, Jianghan University

State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences

Key Laboratory of Safety and High-efficiency Coal Mining Constructed by Anhui Province and Ministry of Education, Anhui University of Science and Technology

AI问答

⁰