A5034827969- High-Velocity Impact and Material Behavior
- Microstructure and mechanical properties
- High-pressure geophysics and materials
- Glass properties and applications
- Microstructure and Mechanical Properties of Steels
- Boron and Carbon Nanomaterials Research
- Metal and Thin Film Mechanics
- Material Dynamics and Properties
- Laser-Plasma Interactions and Diagnostics
- Energetic Materials and Combustion
- Nuclear Materials and Properties
- Fatigue and fracture mechanics
- Metallurgical and Alloy Processes
- Metallic Glasses and Amorphous Alloys
- Thermodynamic and Structural Properties of Metals and Alloys
- Metallurgical Processes and Thermodynamics
- Gas Dynamics and Kinetic Theory
- Fluid Dynamics Simulations and Interactions
- Laser-Matter Interactions and Applications
- Carbon Nanotubes in Composites
- Planetary Science and Exploration
- Magnesium Alloys: Properties and Applications
- Advanced Welding Techniques Analysis
- Advanced Fiber Laser Technologies
- Building materials and conservation
Lawrence Livermore National Laboratory
2020-2024
California Institute of Technology
2017-2020
Neutralization of a shock-generated Richtmyer-Meshkov instability at the interface between heavy and light materials using timed double-shock wave fronts is demonstrated experimentally verified numerically.
The authors use intense laser pulses to compress solid tantalum pressures in excess of 20 million atmospheres. By combing their experimental measurements with existing high-pressure, high-temperature data on Ta, they can create an experimentally bounded equation state that is valid up multiterapascal and thousands degrees kelvin. may serve as a useful pressure standard at the extreme compressions elevated temperatures now achievable state-of-the-art static compression experiments. This work...
We study the deformation of tantalum under extreme loading conditions. Experimental velocity data are drawn from both ramp experiments on Sandia’s Z-machine and gas gun compression experiments. The drive conditions enable materials pressures greater than 100 GPa. provide a detailed forward model including magnetic for Z-machine. Utilizing these experiments, we simultaneously infer several different types physically motivated parameters describing equation state, plasticity, anelasticity via...
Experiments involving the coupling of metal and high explosives (HE) are notable defense-related interest, we seek to refine uncertainty quantification associated with models such experiments. In particular, our focus is on how related constitutive model challenges ability infer explosive parameters when analyzing focused science We consider three experiments an HE accelerating metal: small plate tests tantalum/LX-14 tantalum/LX-17 pairings as well a cylinder test. For all models, perform...
Under dynamic loading conditions and the associated extreme many metals will undergo phase transformations. The change in crystal structure with solid–solid transformations can significantly alter subsequent mechanical response of material. For interpretation experiments involving it is beneficial to have a modeling framework that captures key features material while remaining relatively simple. We introduce candidate apply metal tin highlight range behaviors are captured by model. also...
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