At EMI’s shock-tube facility BlastStar, we can produce a blast wave that corresponds exatcly to a pressure wave created by explosion.
For this purpose, the high-pressure compartment is filled with air before the test. A membrane separates the compartment from the tube. Once the pressure is high enough, the membrane opens in a controlled manner, releasing no fragments. The special form of the shock tube creates a shock wave with identical loading on the specimen at the end of the tube at any location and any time. This is called planar loading.
This loading consists of a pressure and a suction (negative) phase as is tyical for explosions.