盐酸作用后红砂岩能量演化规律研究
Study on law behind energy evolution of red sandstone after hydrochloric acid
高雅茹 1栾庆波1
作者信息
- 1. 黑龙江科技大学 建筑工程学院,哈尔滨 150022
- 折叠
摘要
为了探究盐酸作用后红砂岩的能量演化规律,对盐酸作用后的红砂岩开展了单轴压缩测试,探究单轴压缩过程红砂岩总能量、弹性能、耗散能的演变特征,获得了耗散能与化学损伤变量之间的关系,建立了含耗散能的红砂岩损伤本构模型.结果表明:盐酸浓度越高,红砂岩峰值强度、弹性模量下降越多;红砂岩峰前弹性能逐渐增大、耗散能先增大后减小,峰后弹性能急剧减小、耗散能突增规律;峰值强度时弹性能、耗散能随盐酸浓度增加而下降;得到了红砂岩化学损伤变量与盐酸浓度之间的关系;推导了含耗散能的红砂岩损伤本构关系,该模型能够量化化学-荷载耦合作用下红砂岩变形破坏的全过程.
Abstract
This paper aims to explore the energy evolution of red sandstone after hydrochloric acid.The study involves testing the uniaxial compression on the red sandstone after hydrochloric acid;exploring the evolution characteristics of total energy,elastic energy and dissipated energy of red sandstone during the uniaxial compression process;obtaining the relationship between dissipative energy and chemical damage variables;and establishing a damage constitutive model of red sandstone with dissipative energy.The results show that the higher the concentration of hydrochloric acid,the more the peak strength and e-lastic modulus of red sandstone decrease.The elastic energy gradually increases before the peak,the dissipation energy increases first and decreases later,and after the peak,the elastic energy decreases sharply and the dissipation energy increases suddenly.At peak intensity,the elastic energy and dissipa-tion energy decrease with the increase of hydrochloric acid concentration.The relationship between the chemical damage variables and the concentration of hydrochloric acid in the red sandstone is obtained.The damage constitutive relationship of red sandstone with dissipative energy is derived.This model can quantify the whole process of red sandstone deformation and failure under chemical-load coupling.
关键词
红砂岩/盐酸作用/能量演化/化学损伤变量Key words
sands tone/hydrochloric acid action/energy evolution/chemical damage variables引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据