在不同接压力下接破碎的沙泥石的机械行为:实验调查和基于CT的现场数值建模
Yuxu Shen1,2, Zhaoyun Chai1, Xu Liu1
1Key Laboratory of In-Situ Property-Improving Mining of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China.
Materials (Basel, Switzerland)
|March 14, 2026
概括
优化接压力可以提高破碎岩石的强度和柔性. 该研究发现,3 MPa的接压力在沙性泥石中产生了最好的机械改进,将故障模式从脆性转变为柔性.
科学领域:
- 地质技术工程 地质技术工程
- 岩石力学 岩石力学 岩石力学
- 材料科学 材料科学 材料科学
背景情况:
- 在土木工程项目中常见的破碎岩石质量,通常需要加强以改善其机械性能.
- 接是一种广泛使用的技术,用于填补骨折并增强岩石质量的完整性.
- 了解接压力的影响对于有效的强化至关重要.
研究的目的:
- 为了研究不同接压力 (1 MPa,3 MPa,5 MPa) 对破碎的沙泥石的机械增强的影响.
- 建立一个集成的数值模拟方法来分析接岩石的行为.
- 为优化岩石增强中接参数提供科学基础.
主要方法:
- 在破裂岩石样本上进行了接地试验,机械实验 (无轴压缩),CT扫描和扫描电子显微镜 (SEM).
- 使用CT数据构建了高保真度的数值模型,并将其导入ABAQUS和ANSYS进行模拟.
- 图像处理和网格映射技术用于模型创建.
主要成果:
- 压力强度随着接压力的增加而增加,最显著的改善是在3 MPa.
- 弹性模量,性指数和柔性指数显示随着接压力的增加而增加,而脆性则下降.
- SEM分析显示,从大裂转向微裂,在3MPa时最好填充孔隙,在5MPa时潜在的矩阵损伤.
结论:
- 接压力显著影响破碎的沙泥石的机械性能和故障模式.
- 3MPa的接压力证明是最有效的钢筋,增强了强度,柔性和整体完整性.
- 综合的"CT扫描-现场建模-机械分析"方法为优化接参数和预测岩石行为提供了强大的框架.
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