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- Title
METHOD FOR MEASUREMENT OF DYNAMIC STRAINS IN EXPLOSION WELDING.
- Authors
DOBRUSHIN, L. D.; PEKAR, E. D.; BRYZGALIN, A. G.; ILLARIONOV, S. Yu.
- Abstract
The method is suggested for measurement of dynamic strains by using resistance strain gauges. The working power is supplied by the generator of DC pulses with a voltage of 23 V and duration of 14 ms. The short-time supply of the power allows increasing the working current from 25-50 to 200-250 mA, this leading to almost an order of magnitude increase in sensitivity of the method. The measurement system comprises the DC pulse generator and the digital oscillograph connected to a computer. Calibration tests were carried out, and performance of the measurement system was investigated in a range of elastic and elasto-plastic strains. It is shown that the dynamic strains due to explosion loading of metal structures can be measured at a satisfactory accuracy within -0.6-0.6 % in a time interval of 0-14 ms. In addition, the system makes it possible to fix residual strains of metal of a structure after the dynamic impact.
- Subjects
DYNAMIC loads; STRAINS &; stresses (Mechanics); STRAIN gages; BRIDGE circuits; PULSE generators
- Publication
Paton Welding Journal, 2013, Issue 5, p61
- ISSN
0957-798X
- Publication type
Article