AN EXPERIMENTAL INVESTIGATION OF ELASTICPLASTIC PULSE PROPAGATION IN ALUMINUM RODS AT ELEVATED TEMPERATURES.
Abstract
Experiments are reported involving explosive loading at one end of long, annealed, commercially pure, aluminum rods at temperatures up to 750F. The stress waves are detected by a condenser microphone at the far end of the rod and, in some cases, by strain gages at a cross-section distant from the impact end. The essential features of the recorded velocity-time profiles and strain-time profiles are in agreement with the predictions of a rate independent elastic-plastic theory which takes a Bauschinger effect into account. At room temperature, the reference dynamic stress-strain curve does not differ appreciably from the quasi-static stress-strain curve whereas at elevated temperatures there appears to be a marked difference between the dynamic and quasi-static stress-strain curves. Since the maximum plastic strains are small at cross-sections remote from the impact end the measurements, and consequently the conclusions, are limited to small strains beyond the proportional limit. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1965
- Accession Number
- AD0625468
Entities
People
- R. J. Clifton
- S. R. Bodner
Organizations
- Brown University