Attenuation Characteristics of Stress Wave Peak in Sandstone Subjected to Different Axial Stresses

Figure 1

(a) Experimental apparatus: ① oscillograph; ② dynamic strain meter; ③ computer; ④ laser velocimeter device; ⑤ incident bar; ⑥ chamber of striker bar; ⑦ specimen; ⑧ stress loading device. (b) Diagram of the modified split Hopkinson pressure bar (SHPB) system: 1. stress loading device; 2. transmission bar; 3. steel pads; 4. incident bar; 5. laser velocimeter; 6. striker bar; 7. high-pressure air chamber.

(a)

(b)