岩石破裂过程应变场、红外场定量分析
Quantitative analysis of strain field and infrared field during rock fracture process
段方超 1郭庆斌1
作者信息
- 1. 华北理工大学 矿业工程学院 河北 063210
- 折叠
摘要
为研究岩石变形破坏过程,笔者融合数字图像相关技术和红外热像技术对单轴压缩状态下的粉砂岩进行非接触式全场监测,以平均主应变、平均红外辐射温度两个指标定量刻画粉砂岩的破坏过程.研究结果表明:两场信息指标均随着载荷的变化而呈现出阶段性变化.笔者将阶段划分为峰前和峰后阶段,发现粉砂岩平均主应变值随裂隙发展变化,峰前稳定变化至缓慢增长,峰后迅速增大;平均红外温度在峰前缓慢下降,峰后迅速下降.这些研究结果表明,单轴压缩状态下,粉砂岩破裂过程的力学行为与平均主应变的变化密切相关,为深入理解岩石的力学性质和损伤机制提供了重要的实验依据.
Abstract
To investigate the deformation and failure processes of rock,we integrated digital image correlation and infrared thermography to conduct non-contact full-field monitoring of fine-grained sandstone under uniaxial compression.The study utilized two metrics,average principal strain and average infrared radiation temperature,to quantitatively characterize the failure process of the sandstone.The research findings revealed that both metrics exhibited staged variations corresponding to changes in applied load,delineating these stages as pre-peak and post-peak.It was observed that the average principal strain of the sandstone varied with the development of cracks,showing stable changes leading to slow growth before the peak and rapid increase thereafter.Conversely,the average infrared temperature exhibited a slow decrease before the peak and a rapid decline after.These results indicate a close correlation between the mechanical behavior of sandstone during the fracture process under uniaxial compression and the variations in average principal strain,providing essential experimental insights into understanding the mechanical properties and damage mechanisms of rock.
关键词
岩石破裂/数字图像相关技术/红外辐射技术/定量分析Key words
Rock fracture/Igital image correlation technology/Infrared radiation technology/Quantitative analysis引用本文复制引用
出版年
2024
NETL
NSTL
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