Casadei Ks 3000 Manual11/30/2022 Because split-Hopkinson pressure bar (SHPB) specimen dimensions are small compared to any field rock mechanics problem, the rate-dependent rock mass properties are also determined for each rock using Hoek Brown criteria. It is seen that specimen dimension does not have a significant impact on the dynamic stress-strain response of both rocks however, the dynamic-to-static peak stress ratio ( DIF) varies between 1.8 to 8.1 at any specimen size. For experimental analyses under a high loading rate, the intact rock specimens are prepared in five different specimen sizes to understand the effect of specimen size on the stress-strain and peak stress responses. The petrographical, physical, and mechanical responses of the rocks are studied through detailed experimental and numerical analyses. In the present work, the rate-dependent stress-strain responses of limestone and dolomite, sedimentary rocks, are determined by using a split Hopkinson pressure bar device under a high loading rate.
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