典型岩石中的能量演变和细结构效应,这些岩石受到冲击负荷的影响
Ding Deng1,2, Gaofeng Liu2, Lianjun Guo2
1School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China.
Materials (Basel, Switzerland)
|January 10, 2026
概括
这项研究检查了撞击负载下的岩石行为. 玄武岩显示出最高的强度,而砂岩则更柔性,为工程应用揭示了岩石破裂机制的关键见解.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 岩石机械学 岩石机械学
背景情况:
- 在动态冲击下了解岩石材料的行为对于采矿和土木工程至关重要.
- 之前的研究集中在静态性质上,不太重视动态反应和能量消散.
研究的目的:
- 研究不同类型岩石在冲击负荷下的机械行为和能量演变.
- 分析矿物成分,微观结构和故障机制之间的关系.
- 开发一种基于强度,能量和时间密度的岩石反应特征的模型.
主要方法:
- 动态冲击测试使用分裂的霍普金森压力杆 (SHPB) 装置.
- 用X射线衍射 (XRD) 和扫描电子显微镜 (SEM) 进行矿物学和微观结构分析.
- 引入一个能量-时间密度指数和碎形分析.
主要成果:
- 玄武岩,蓝色砂岩和花岩表现出脆性失败;红色和绿色的砂岩显示出更大的柔性.
- 能量时间密度排名:绿色砂石 > 红色砂石 > 花岩 > 蓝色砂石 > 玄武岩.
- 证实了矿物学,微观结构和碎片化之间的联系,其中内粒度到跨粒度骨折是关键.
- 较高的碎形尺寸与复杂的微裂和能量消散强度相关.
结论:
- 建立了一个动态强度-能量-时间密度映射模型用于岩石材料的表征.
- 确定了跨粒度到跨粒度骨折过渡作为冲击粉碎的主要机制.
- 这些发现为采矿挖掘和岩石质量的稳定性评估提供了重要的理论价值和实际应用.
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