首页|Numerical Simulation on Effect of Indenter Radius During Point Load Test
Numerical Simulation on Effect of Indenter Radius During Point Load Test
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To investigate the effect of the radius of the spherical heads of the indenter on the results of a point load test,this study uses a discrete element model based on the flat joint contact for numerical simulation.Results show that the discrete element model based on the flat joint model can accurately describe the damage process and size effects of rocks under point loads.Damage of rock samples under the loading of different radii of the indenter can be characterized as vertical splitting damage,and the larger the radius of the indenter is,the larger the damage area.Values of the point load strength of rock samples increase with increasing the radius of the indenter and obey a power function relationship.The results of this study provide a theoretical basis for the selection of the spherical heads of indenters in point load tests and tool design for mechanical rock breaking.
discrete element methodflat joint modelpoint load strengthsize effect
王智、欧阳义平、杨启
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State Key Laboratory of Ocean Engineering
Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration,Shanghai Jiao Tong University,Shanghai 200240,China
Shanghai Jiao Tong University Underwater Engineering Institute Co.,Ltd.,Shanghai 200231,China
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