Difference Scheme for Modifying the Experimental Temperature in High-Temperature SHPB Test

The governing equations of the waves transmitting in the waveguide bar with temperature gradient were dispersed using difference scheme, and then the strain information of any point in the bar was calculated through one point's strain information using computer procedure. One experiment was designed to prove this method. This method can be used in high-temperature split Hopkinson press bar (SHPB) experiment: the guide bar contacts the specimen in high-temperature area. The strain information of this area is calculated through the strain information of the room-temperature point, where a stain gauge is glued. Then the high temperature stress-strain curve of the specimen can be obtained through the strain information of the points, which connect the specimen and the waveguide bar.