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Updated: Dec 6, 2025
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Research and Development of High-performance Explosives
Published on: February 20, 2016
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Numerical Considerations in the Modeling of a High Explosive Cylinder Experiment Using an ALE Continuum Mechanics
Marvin A Zocher1, Tariq D Aslam1
1Los Alamos National Laboratory, Los Alamos, NM 87545, USA.
Materials (Basel, Switzerland)
|October 10, 2020
Summary
This study validates phenomenological parameters for the Wescott-Stewart-Davis reactive burn model by simulating PBX 9501 explosive detonations. Numerical analysis using the FLAG code shows good agreement between predicted and measured free-surface velocities.
Area of Science:
- Computational physics
- Materials science
- Explosives engineering
Background:
- Detonation physics requires accurate reactive burn models.
- PBX 9501 is a widely used explosive formulation.
- Phenomenological parameters are crucial for model fidelity.
Purpose of the Study:
- To evaluate a proposed set of phenomenological parameters for the Wescott-Stewart-Davis reactive burn model.
- To assess the model's predictive capability for PBX 9501 detonation.
- To validate numerical simulation methods for explosive events.
Main Methods:
- Numerical analysis using the Los Alamos continuum mechanics code FLAG.
- Modeling of PBX 9501 detonation experiments within a copper cylinder.
- Comparison of simulated free-surface velocities with experimental data.
Main Results:
- The proposed phenomenological parameters provide reasonable predictions of free-surface velocity.
- Numerical simulations using FLAG demonstrate good agreement with experimental measurements.
- Key numerical considerations for modeling explosive detonations were discussed.
Conclusions:
- The Wescott-Stewart-Davis reactive burn model, with the evaluated parameters, is suitable for simulating PBX 9501 detonations.
- FLAG code provides a reliable platform for continuum mechanics analysis of explosive events.
- The study supports the use of these parameters for future predictive modeling.
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