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Modeling and Design of SHPB to Characterize Brittle Materials Under Compression for High Strain Rates
Tomasz Jankowiak1, Alexis Rusinek2,3, George Z Voyiadjis4
1Institute of Structural Analysis, Poznan University of Technology, Piotrowo 5, 60-965 Poznań, Poland.
Materials (Basel, Switzerland)
|May 14, 2020
Summary
This study presents an analytical and numerical model for the split Hopkinson pressure bar (SHPB) to measure concrete
Area of Science:
- Materials Science
- Mechanical Engineering
- Solid Mechanics
Background:
- Accurate measurement of material properties under dynamic loading is crucial for engineering applications.
- The split Hopkinson pressure bar (SHPB) is a standard experimental technique for dynamic material testing.
- Understanding concrete's behavior under high strain rates is essential for structural safety and design.
Purpose of the Study:
- To develop and validate an analytical and numerical model for the split Hopkinson pressure bar (SHPB).
- To enable accurate measurement of the dynamic compression strength and strain rate sensitivity of concrete.
- To provide a tool for designing and validating SHPB experimental setups.
Main Methods:
- Analytical prediction using one-dimensional wave propagation theory.
- Numerical simulations using LS-DYNA finite element software.
- Coupling of experimental, modeling, and numerical results for inverse method validation.
Main Results:
- The study successfully combined analytical predictions and numerical simulations for SHPB.
- The developed method allows for the prediction of compressive strength and strain rates in SHPB tests.
- Validation of measurement consistency and strain rate sensitivities of concrete was achieved.
Conclusions:
- The proposed analytical and numerical approach provides a reliable method for SHPB analysis.
- This work facilitates the accurate determination of concrete's dynamic compression strength and strain rate dependence.
- The findings support the design of new SHPB setups for brittle material characterization.
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