Abstract
Some of the problems regarded as inherent in materials testing at high strain rates are associated with inertia effects, both in the loading mechanism and in the specimen itself. In fact, it has generally been difficult to ensure a homogeneous and uniaxial strain field. Some of these problems encountered in dynamic testing have, however, been circumvented in a simple testing unit, developed at the Technical University of Denmark and described in the present paper.
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Abbreviations
- r :
-
mean radius of specimen
- A :
-
cross-sectional area of specimen
- C :
-
capacity
- I :
-
current
- L :
-
inductance
- M :
-
total mass of specimen
- V :
-
voltage
- R :
-
resistance
- σ:
-
stress
References
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Alder, J. F. andPhillips, V. A., “The Effect of Strain Rate and Temperature on Resistance of Al, Cu, and Fe to Compression,”J. Inst. Metals, 83, 80–86, 1954-55.
Baron, H. G., “Stress/Strain Curves of Some Metals and Alloys,”J. Iron St. Inst., 182, 354–365, 1956.
Davies, E. D. H., andHunter, S. C., “The dynamic compression testing of solids by the method of the split Hopkinson pressure bar,”J. Mech. Phys. Solids, 11, 155–179, 1963.
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Niordson, F.I. A unit for testing materials at high strain rates. Experimental Mechanics 5, 29–32 (1965). https://doi.org/10.1007/BF02320901
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DOI: https://doi.org/10.1007/BF02320901