DYNAMIC COMPRESSION TESTING OF CRUSHER GAGE MATERIAL
Ballistics Research Rept.
NAVAL ORDNANCE LAB WHITE OAK MD
Pagination or Media Count:
In order to determine the validity of static calibration of crusher gages, annealed copper crusher gage material has been tested in compression at room temperature at rates of strain from 1.66 x 0.001 ininsec to 7.15 x 1000 ininsec. A modified Hopkinson bar apparatus as originally used by Kolsky An investigation of the Mechanical Properties of Materials at Very High Rates of Loading. Proc. of the Physical Society, v. 62, pt. II, 1 Nov. 1949 was used to obtain dynamic stress-strain relations for this material. It has been found that this material is weakly strain rate sensitive and static calibration of crusher gages will introduce an insignificant error in the measurement of dynamic peak pressures.
- Machinery and Tools