The dynamic temperature measurement of split Hopkinson bar specimens using small thermocouples and infrared streak photography

Two independent methods (embedded thermocouples and a commercial infrared detec- tion system) were used to determine the temperature rise due to dynamic deformation of copper and iron specimens in a compression split Hopkinson pressure bar system. A paint with a quoted emis- sivity of 0.95 was used to improve the accuracy of the infrared measurements. Using this value, the two measurement methods were found to agree to within 1 K.