Shock Wave Pressure Measurement and Calibration Method Based on Bar Pressure Sensor.

Area of Science:

• Mechanical Engineering
• Physics
• Materials Science

Background:

• Current bar pressure sensors have limitations in measuring shock wave pressure accurately.
• Near-field explosion shock wave pressure measurement requires precise and reliable methods.

Purpose of the Study:

• To design an improved shock wave pressure measurement method overcoming existing limitations.
• To validate the accuracy and reliability of the developed measurement and calibration system.

Main Methods:

• Combined a bar pressure sensor with photon Doppler velocimetry (PDV) and strain measurement.
• Utilized one-dimensional stress wave theory to calculate shock wave pressure from measured strain and particle velocity.
• Employed split-Hopkinson pressure bar (SHPB) experiments for system calibration and validation.

Main Results:

• The improved method accurately calculated shock wave pressure applied to a pressure bar.
• Stress wave measurement results aligned with theoretical calculations for various wave-impedance materials.
• The peak deviation between PDV and strain measurement was less than 1.5%.

Conclusions:

• The developed measurement method offers high accuracy for shock wave pressure.
• The proposed calibration method is feasible and validates the test system's reliability.
• This approach enhances the precision of shock wave pressure measurements in relevant applications.