市政技术2024，Vol.42Issue(7)：1-6,21,7.DOI:10.19922/j.1009-7767.2024.07.001
循环热力作用岩石Ⅰ型断裂试验方法及其可行性研究
Study on Test Method and Feasibility of Rock Mode-Ⅰ Fracture After Cyclic Thermal Effect
摘要
Abstract
It's great significant to explore the fracture characteristics of rocks after cyclic stress and cyclic tempera-ture for ensuring the stability of underground compressed air energy storage,a"double carbon"project.An experi-mental test method for the mode-Ⅰ fracture characteristics of rocks after cyclic thermal effects was proposed and the feasibility of the method was studied.In order to study the stress deformation characteristics and mode-Ⅰ fracture characteristics,the corresponding rock specimens with cracks were designed as well as the corresponding test pro-cedures;COMSOL Multiphysics software was used to simulate increase and decrease temperature and uniaxial com-pression test and the phase field fracture method was used to simulate the three-point bending beam fracture test to obtain the the corresponding thermal response and crack path.The applicability and feasibility of the test method was demonstrated.Numerical simulation results show that the test method can obtain the temperature field,stress field and crack propagation path with the minimal theoretical errors.The method can test only one specimen to ob-tain the stress-deformation characteristics during the cyclic thermal-mechanical loads and the mode-Ⅰ fracture characteristics after cycling.关键词
循环温度/循环应力/Ⅰ型断裂/相场法/三点弯梁试验Key words
cyclic temperature/cyclic stress/mode-Ⅰ fracture/phase field method/three-point bending test分类
能源与动力引用本文复制引用
袁野,周舒威..循环热力作用岩石Ⅰ型断裂试验方法及其可行性研究[J].市政技术,2024,42(7):1-6,21,7.基金项目
国家自然科学基金面上项目(52278408) （52278408）
国家自然科学基金优秀青年科学基金项目(海外)(2021) （海外）
中央高校基本科研业务费专项资金(22120240146) （22120240146）
