关于失败机制的研究和在贵州东南部的粘土石板的数值模拟
Jinfeng Zhang1, Wuzhou Zhang2, Kunpeng Lu1
1College of Resources and Environmental Engineering, Guizhou University, Huaxi New Campus of Guizhou University, Guiyang, Guizhou 550025, China.
ACS omega
|September 25, 2023
概括
粘土石板中的石英含量显著影响其机械性能和在单轴压缩下故障机制. 更高的石英含量会导致更多的骨折和损伤率增加,影响变形期间的能量转化.
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:
- 石板的机械性能受到其矿物成分的显著影响,特别是石英和粘土矿物质.
- 了解这些影响对于预测压力下的石板行为至关重要,特别是在地质技术应用中.
研究的目的:
- 研究不同石英和粘土矿物质含量对粘土石板在单轴压缩下机械性能和故障机制的影响.
- 通过使用数值模拟来分析裂纹形成,能量转化和与矿物质含量相关的损伤率.
主要方法:
- 在室内进行了单轴压缩测试,以确定模拟参数.
- 建立了具有不同矿物成分的粘土石板的数值模型.
- 使用碎形维度分析来评估裂纹模式和损伤率.
主要成果:
- 石英含量增加导致骨折数量增加,最高石英组与最低石英组相比,观察到33.4%的增加.
- 宏观骨折主要是由拉力裂,在显微水平上有一些剪切元件.
- 能量转换曲线反映了应力-应变行为,显示了不同的弹性,产量和强度损失阶段. 分散的能量与石英含量正相关.
结论:
- 该研究量化地将石英含量与粘土石板中断裂密度和损伤率的增加联系起来.
- 矿物成分,特别是石英含量,是控制单轴应力下石板能量转换和故障机制的关键因素.
- 这些发现提高了对粘土石板失效机制的理解,为地质工程和材料科学提供了宝贵的见解.
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