DESIGN AND PERFORMANCE OF A DYNAMIC TESTING SYSTEM WITH REVERSE LOADING CAPABILITY
A new testing system has been designed which has the capability of forward and reverse loading of material specimens at impact strain rates. The apparatus is essentially a modification of the tensile split Hopkinson bar with a prestress bar loading device available at the dynamic plasticity laboratory of Ispra JRC. The performance of the new apparatus has been determined experimentally and compared with its characteristics as calculated numerically with the EURDYN-1D code. Complete qualitative agreement was obtained. The system has still some teething problems before reaching its design specifications, but these can be easily surmounted by improving the mechanical performance of various components. With this new system, a specimen loaded in direct shear seems to be the optimum configuration to use, in order to prevent various uncertainties and limitations inherent in other testing machines. With this system, new data regarding the stress - strain characteristics of stainless steels under reverse loading could be generated in the future, thus allowing the investigation of the hysteresis loop and the associated Bauschinger effect at impact rates of straining.
Bibliographic Reference: INTERNATIONAL SYMPOSIUM ON INTENSE DYNAMIC LOADING AND ITS EFFECTS, PEKING (CHINA), JUNE 3-7, 1986 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32507 ORA
Availability: Can be ordered online
Record Number: 1989124093500 / Last updated on: 1987-01-01
Available languages: en