【摘要】 通过SHPB对含节理岩石的动力加载试验,详细剖析了应力波穿越节理岩石时的能量耗散过程和能量耗散机理,研究显示:波型的多样化与应力状态的复杂性是导致系统发生能量耗散的根本原因;对SHPB冲击加载过程中系统能量耗散方式的探讨结果表明,能量耗散主要有3种类型:分别是塑性势能、表面能以及热能,并从微观层面解释了上述3种能量耗散应力波能量的机理。更多还原

【Abstract】 Based on dynamic loading tests of jointed rock by Split Hopkinson Pressure Bar(SHPB),the process and mechanisms of energy dissipation in stress wave propagation through jointed rock were discussed.The results showed that the variety of wave form and complexity of stress state were the main cause of energy dissipation of the system.In this paper,the manner of system energy dissipation in the process of dynamic loading with SHPB is investigated,and It is indicated that there are three kinds of energy dissipation modes,they are respectively plastic potential energy,surface energy and heat energy.The mechanisms of the three kinds of energy dissipation in the stress wave propagation are explained microscopically.更多还原