Hydrocode analysis of lateral stress gauges in shocked tantalum

Journal Article · Wed Dec 12 04:00:00 EST 2007 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2833187· OSTI ID:21039552

Harris, E J; Winter, R E ^[1]

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1. Hydrodynamics Division, AWE, Aldermaston, Reading, Berkshire, RG7 4PR (United Kingdom)

Experiments published by other workers, on the resistance change of manganin stress gauges embedded in a lateral orientation in tantalum targets shocked to a range of stresses, have been analysed using an adaptive mesh refinement hydrocode. It was found that for all of the four experiments the shape of the time profile of the computed lateral stress in the mounting layer closely matched the shape of the experimental lateral stress profiles. However, the calculated lateral stresses at the gauge location in the mounting layer are significantly less than the lateral stresses that would have been produced in the target if no gauge had been present. The perturbation caused by the gauge increased as the strength of the applied shock increased. When the perturbations are taken into account values of flow stress that are significantly smaller than those reported in the original research paper are derived. The work shows that the lateral gauge technique can give valuable information on strength provided high resolution simulation is used to compensate for the perturbations caused by the gauges.

• OSTI ID: 21039552
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 955; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COMPUTERIZED SIMULATION
DISTURBANCES
FLOW STRESS
LAYERS
MANGANIN
MECHANICAL PROPERTIES
ORIENTATION
RESOLUTION
SHAPE
SHOCK WAVES
STRESS ANALYSIS
TANTALUM