摘要
利用MTS 810电液伺服材料试验系统以及与之配套的高温炉MTS 652.02进行单轴压缩实验,研究泥岩在常温～800℃高温作用下,变形特性与强度特性随温度的变化规律。尽管实验结果有一定的离散性,但仍具有明显的总体规律。泥岩的弹性模量及峰值强度在常温～400℃内,随温度升高呈上升趋势;当T>400℃后,弹性模量及峰值强度均急剧下降。依据岩石损伤力学与统计强度理论,结合高温作用下泥岩的力学性能,构建了考虑温度效应的泥岩损伤演化方程和本构模型,并针对所测泥岩岩样的力学特性,给出了相应的损伤本构方程具体参数,本构模型与试验结果具有很好的印证性。
The deformation and strength characteristics of mudstone were studied by using MTS 810 Rock Mechanics Servo-Controlled Testing System and MTS 652.02 High Temperature Furnace under the action of temperatures ranging from room temperature to 800℃. Although the experimental results have some certain discreteness, they also have obvious overall regularity. The elastic modulus and peak of strength increase when the temperature is between room temperature and 400℃, while they decrease rapidly when the temperature is over 400℃. Based on rock damage mechanics and statistical strength theory, combining mechanical properties of mudstone at high temperature, the damage evolution equation and constitutive model of mudstone, considering effects of temperature and loading speed, are established. Furthermore, aimed at mechanical properties of tested mudstone, the corresponding detailed parameters of damage equation are given and constitutive model has a good agreement with the experiment results.
出处
《采矿与安全工程学报》
EI
北大核心
2012年第6期852-858,共7页
Journal of Mining & Safety Engineering
基金
国家自然科学基金重大项目(50634050)
国家自然科学基金项目(51074166,51104128)
住房和城乡建设部科学技术项目(2011-K3-5)
江苏省产学研前瞻性联合研究项目(BY2012085)
江苏省高校自然科学基础项目(08KJD130003)
江苏省研究生培养创新工程项目(CX09B_108Z)
江苏省青蓝工程项目
徐州工程学院校级培育项目(XKY2010102)
关键词
高温作用
泥岩
变形特征
强度特征
损伤演化
high temperature effect
mudstone
deformation characteristic
strength characteristic
damage evolution
