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中文摘要: 采用分离式霍普金森压杆(SHPB)试验装置,对泥质粉砂岩进行了不同含水状态下的动态力学性能试验,分析了含水率变化对泥质粉砂岩动力特性的影响,并基于连续损伤理论及统计强度理论建立了泥质粉砂岩的动态损伤力学模型,得到了相应的损伤演化规律。研究结果表明,采用基于Weibull分布建立的动态时效损伤模型,其理论拟合曲线与实测曲线具有较好的一致性,损伤参数F0与弹性模量及冲击速度有一定的相关性,弹性模量越大,损伤参数F0也越大,含水率的变化对岩石动力特性具有较大的影响。
Abstract:By using the Split Hopkinson Pressure Bar (SHPB), the test for the dynamic mechanics properties of the argillaceous siltstone with different water contents are presented, and the influence of the moisture content on them is also analyzed. The dynamic damage model of argillaceous siltstone is established on the basis of the continuum damage theory and statistical strength theory, and the corresponding damage evolution rule is also obtained. It shows that the curve fitted by the constitutive model established by the Weibull distribution has a good consistency with the testing curve. The damage parameter F0 has a certain correlation with the elastic modulus and impact velocity. The bigger the elasticity modulus, the greater the damage parameter F0 will be. What’s more, the change of moisture content has great influence on the dynamic characteristics of rock.
文章编号: 中图分类号: 文献标志码:
基金项目:国家自然科学基金资助项目(41202195)
作者 | 单位 |
詹金武 | 北京交通大学 土木建筑学院,北京 100044 |
张乃烊 | 福州大学 土木工程学院,福州 350108 |
黄 明 | 福州大学 土木工程学院,福州 350108 |
张冰淇 | 福州大学 土木工程学院,福州 350108 |
引用文本:
詹金武,张乃烊,黄 明,张冰淇.冲击荷载作用下含水泥质粉砂岩的损伤规律研究[J].有色金属(矿山部分),2015,67(6):45-48.
ZHAN Jinwu,ZHANG Naiyang,HUANG Ming,ZHANG Bingqi.Study on the damage feature of water-bearing argillaceous siltstone under the impact load[J].NONFERROUS METALS(Mining Section),2015,67(6):45-48.
詹金武,张乃烊,黄 明,张冰淇.冲击荷载作用下含水泥质粉砂岩的损伤规律研究[J].有色金属(矿山部分),2015,67(6):45-48.
ZHAN Jinwu,ZHANG Naiyang,HUANG Ming,ZHANG Bingqi.Study on the damage feature of water-bearing argillaceous siltstone under the impact load[J].NONFERROUS METALS(Mining Section),2015,67(6):45-48.