Fremgangsmåte og apparat for å måle materialers eller strukturers egenskaper

摘要

Figure 3 is a simplified view of a Hopkinson bar or pressure bar bundle system (101) comprising an input bar bundle (103) having input bars (103a) and an output bar bundle (104) having output bars (104a). A brittle test specimen (102) is positioned in between the bundles (103, 104). Means is provided to induce a one-dimensional compression force C into the Hopkinson bar bundles. Instrumentation is introduced onto the bars (103a and 104a) for measuring values of shear wave or crack propagation. The specimen (102) may be placed under different stress conditions measured by appropriate instrumentation on the bar bundles (103, 104). Figure 6 shows a rod gauge (500) glued to a rock massive R arranged to measure wave effects generated in the rock massive. Other arrangements provide amplification of these wave effects prior to measurement by instrumentation (e.g. 502) on the gauge (500).