Testing of Insulating material for Split Hopkinson Pressure Bar

Abstract

The Split-Hopkinson Pressure Bar (SHPB) is used setup for high strain rate testing. When the
structure subjected to the dynamic loading the high strain rate data is required for safety and structural
integrity assessment of structure. The sample to be tested is first heated at required temperature and then
sandwiched between the incident and transmission bar. The gas pressure is used to propel the striker bar
towards the incident bar. As soon as the specimen comes in contact with the bar heat transfer takes place
between the specimen and the bar. The specimen loses its required testing temperature. Hence, insulating
materials are required .To avoid heat loses insulating materials such as Glass, Cement, Calcium hydroxide,
Titanium dioxide were experimentally tested and results were found using chinos data logger. Materials like
Glass, Calcium hydroxide, Cement were not able to insulate at higher temperature whereas cement could
satisfactorily insulate at lower temperature