Indigenous Design and Development of Split Hopkinson Pressure Bar (SHPB) test setup for characterization of materials at high strain rates

Abstract

Abstract This paper presents design and development of split Hopkinson pressure bar (SHPB) indigenously for testing of different materials at high deformation rate. SHPB is capable to measure the deformation rate 100s-1 to 2,000s-1, by maintaining the uniform and uni-axial stress in the samples. SHPB apparatus consist of the mechanical components, support structure, bars supports and the incident and transmission bars, striker bar, gas gun, piston and rod assembly. The momentum trap system is used to absorb the energy in the form of friction and heat. All components are designed, manufactured, calibrated and assembled to test the samples. Results obtained at high deformation rates are used to characterize samples of different materials by converting in the form of strain, strain rate and stress amplitude in samples.