Pulse shaping techniques for testing elastic-plastic materials with a split Hopkinson pressure bar.
- University of Arizona, Tucson, AZ
We present pulse shaping techniques to obtain compressive stress-strain data for elastic-plastic materials with a split Hopkinson pressure bar. The conventional split Hopkinson pressure bar apparatus is modified by placing a combination of copper and steel pulse shapers on the impact surface of the incident bar. After impact by the striker bar, the copper-steel pulse shaper deforms plastically and spreads the pulse in the incident bar so that the sample is nearly in dynamic stress equilibrium and has a nearly constant strain rate in the plastic response region. We present analytical models and data that show a broad range of incident strain pulses can be obtained by varying the pulse shaper geometry and striking velocity. For an application, we present compressive stress-strain data for 4340 R{sub c} 43 steel.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 961629
- Report Number(s):
- SAND2004-3459J
- Journal Information:
- Proposed for publication in Experimental Mechanics., Journal Name: Proposed for publication in Experimental Mechanics. Journal Issue: 2 Vol. 45
- Country of Publication:
- United States
- Language:
- English
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