Modelling the temperature and strain rate dependence of spallation in metals

Journal Article · Fri Jul 10 04:00:00 EDT 1998 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.55531· OSTI ID:21185633

Giles, A R; Maw, J R ^[1]

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1. AWE, Aldermaston, Reading (United Kingdom)

Further refinements to our implementation of the Johnson void growth model in 2D hydrocodes are described. A consistent treatment of temperature effects is now included and a treatment of failure when voids coalesce has been developed. The temperature dependence of spall strength in the model is tested by comparison with the results of a series of plate impact experiments on aluminium with varying initial temperatures. Observations of spallation in experiments carried out using the AWE HELEN laser also compare favourably with the model predictions. The short pulse durations typical in the latter experiments enable data to be obtained on the strain rate dependence of spall strength which provide a more stringent test of the model's capabilities.

• OSTI ID: 21185633
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 429; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
FAILURES
FRACTURE PROPERTIES
IMPACT TESTS
LASER RADIATION
PLATES
PULSES
SOLIDS
SPALLATION
STRAIN RATE
TEMPERATURE DEPENDENCE
VOIDS