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Improved expanding ring technique for determining dynamic material properties
1College of Science, National University of Defense Technology, 410073 Changsha, People's Republic of China. mzliang@nudt.edu.cn
The Review of Scientific Instruments
|July 5, 2013
Summary
A new projectile-based expanding ring technique determines dynamic material properties under uniform tensile loading. This method overcomes limitations of explosive and electromagnetic techniques for high strain rate material characterization.
Area of Science:
- Materials Science
- Mechanical Engineering
- Experimental Physics
Background:
- Current expanding ring techniques (explosive, electromagnetic) have practical limitations.
- Accurate determination of dynamic material properties requires uniform loading conditions.
- High strain rate material behavior is crucial for many engineering applications.
Purpose of the Study:
- To develop an improved expanding ring experimental technique.
- To achieve uniform one-dimensional tensile loading conditions.
- To overcome limitations of existing dynamic material property testing methods.
Main Methods:
- Utilized lateral impact loading from a low-density projectile.
- Applied the technique to 1100-0 aluminum rings.
- Achieved uniform uniaxial stress conditions at high stress rates.
Main Results:
- Demonstrated a convenient and effective method for dynamic material property testing.
- Successfully approximated uniform one-dimensional tensile loading.
- Generated high stress rates suitable for material characterization.
Conclusions:
- The projectile-based expanding ring technique is a viable alternative for dynamic material property determination.
- This method offers improved uniformity and practicality over existing techniques.
- The technique is effective for characterizing materials like 1100-0 aluminum at high strain rates.
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