A split Hopkinson bar technique for low-impedance materials
- 1 June 1999
- journal article
- Published by Springer Science and Business Media LLC in Experimental Mechanics
- Vol. 39 (2), 81-85
- https://doi.org/10.1007/bf02331109
Abstract
An experimental technique that modifies the conventional split Hopkinson pressure bar has been developed for measuring the compressive stress-strain responses of materials with low mechanical impedance and low compressive strengths such as elastomers at high strain rates. A high-strength aluminum alloy was used for the bar materials instead of steel, and the transmission bar was hollow. The lower Young's modulus of the aluminum alloy and the smaller cross-sectional area of the hollow bar increased the amplitude of the transmitted strain signal by an order of magnitude as compared to a conventional steel bar. In addition, a pulse shaper lengthened the rise time of the incident pulse to ensure stress equilibrium and homogeneous deformation in the low-impedance specimen. Experimental results show that the high strain rate, compressive stress-strain behavior of an elastomeric material can be determined accurately and reliably using this technique.Keywords
This publication has 11 references indexed in Scilit:
- Dynamic compressive failure of a glass ceramic under lateral confinementJournal of the Mechanics and Physics of Solids, 1997
- On the use of a viscoelastic split hopkinson pressure barInternational Journal of Impact Engineering, 1997
- A Split Hopkinson Bar Technique to Evaluate the Performance of AccelerometersJournal of Applied Mechanics, 1996
- Methodological aspects of studying dynamic material properties using the Kolsky methodInternational Journal of Impact Engineering, 1995
- Generalization of split Hopkinson bar technique to use viscoelastic barsInternational Journal of Impact Engineering, 1994
- Critical Appraisal of Limiting Strain Rates for Compression Testing of Ceramics in a Split Hopkinson Pressure BarJournal of the American Ceramic Society, 1994
- Asymptotic analysis of wave propagation in a finite viscoplastic barActa Mechanica, 1991
- Analysis of Wave Propagation in Elastic Cylindrical Shells by the Perturbation MethodJournal of Applied Mechanics, 1972
- On the Use of a Torsional Split Hopkinson Bar to Study Rate Effects in 1100-0 AluminumJournal of Applied Mechanics, 1971
- An Investigation of the Mechanical Properties of Materials at very High Rates of LoadingProceedings of the Physical Society. Section B, 1949