CONFINEMENT EFFECTS ON THE DYNAMIC COMPRESSIVE PROPERTIES OF GRANITE

摘要：

The behavior of rock under dynamic loading has gained great attention in many fields,such as exploration,rock fragmentation,military defense and rock-burst.Experiments on granite under uniaxial and confined compressive loading are conducted with the split Hopkinson pressure bar(SHPB).By adding the soft material mass as the pulse shaper,it can ensure the stress uniformity in the specimens before fracture and avoid the fluctuation of test data due to input stress pulse.The experimental results show that the compressive strength and the fragment numbers of granite increase with the strain rate.The fragment size decreases with the strain rate.The research method and conclusions can be used to analyze the dynamic behavior of the other brittle materials.

关键词： split Hopkinson pressure bar(SHPB) pulse shaper granite confined pressure

作者: G.Chen Y.C.Kuang A.M.Xu P.H.Peng

作者单位: Institute of Structural Mechanics.China Academy of Engineering Physics,Sichuan,621900 China Southwest Petroleum University,Sichuan,610500,China

会议类型: 国际会议

会议名称: The Third International Conference on Heterogeneous Material Mechanics(第三届国际非均匀材料力学会议)

会议地点: 上海

会议语种:英文

页码: 543-546

在线出版日期: 2011-05-22（万方平台首次上网日期，不代表论文的发表时间）