Research On Dynamic Responses And Damage Effect Of Red Sandstone With Fluid-solid Coupling Under Impact Loading

The research object presented in this paper is coupling effect of porous redsandstone which is more frequently encountered. And this paper use the test system ofSplit hopkinson pressure bar (SHPB) to survey the impact test action of differentporosity red sandstone in different coupling medium in order to obtained the dynamicwaveform and dynamic response curve of fluid-solid coupling red sandstone underimpact loadinging Using theoretical analysis and laboratory data, the paper analyzesthe impact of porosity, coupling medium, rate and different stain wavelength on thedynamics characteristics of red sandstone. Based on the experiment study of differentcoupling medium red sandstone under cyclic impact loading, this paper discussed thedynamic characteristics law of porous sandstone under cyclic impact loadinging andanalyzed theoretically the mechanism of coupling medium under cyclic loading Thispaper analyzed the damage effect law of different coupling media red sandstone undercyclic impact loading by using ultrasonic caustic technology. Moreover, it asloanalyzed the energy contrast with energy method when red sandstone was damagedand Combined with the damage pictures, to obtain the damage mode of red sandstoneunder different condition, which laid a theoretical foundation for practical application.