MHD modeling of atlas experiments to study transverse shear interface interactions

Conference · Mon Jan 01 04:00:00 EST 2001

OSTI ID:975688

Cochran, F L ^[1]; Hammerberg, J E ^[2]; Keinigs, R K ^[3]; Faehl, R J ^[4]

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1. Frederick L.
2. James E.
3. Rhonald K.
4. Rickey J.

The transverse shear established at the interface of two solids moving at differential velocities on the order of the sound speed is being studied in experiments on the ATLAS capacitor bank at Los Alamos. The ATLAS bank has finished certification tests and has demonstrated peak currents of 27.5 MA into an inductive load with a risetime of 5 microseconds. One- and two-dimensional MHD calculations have been performed in support of these 'friction-like' ATLAS experiments. Current flowing along the outer surface of a thick aluminum liner, 10 mm thick at impact with the interaction target, accelerates the liner to velocities of {approx}1.0-1.5 km/s. This cylindrically imploding liner impacts a target assembly composed of alternating disks of high- and low-density materials. Different shock speeds in the two materials leads to a differential velocity along the interface. Shock heating, elastic-plastic flow, and stress transport are included in the calculations. Material strength properties are modeled with a Steinburg-Guinan treatment in these first studies. Various design configurations for the ATLAS experiments are now being considered and will be presented.

• Research Organization: Los Alamos National Laboratory
• Sponsoring Organization: DOE
• OSTI ID: 975688
• Report Number(s): LA-UR-01-4504
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
CAPACITORS
DESIGN
HEATING
IMPACT SHOCK
LINERS
MAGNETOHYDRODYNAMICS
MECHANICAL PROPERTIES
SHEAR
TARGETS