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SUMMARY:Towards extracting high strain rate constitutive relations using i
 mpact nanoindentation and finite elements - James Dean\, Gordon Laboratory
 \, Department of Materials Science & Metallurgy\, University of Cambridge
DTSTART:20090129T160000Z
DTEND:20090129T170000Z
UID:TALK15086@talks.cam.ac.uk
CONTACT:Stephen Walley
DESCRIPTION:A procedure is described for determining high strain rate cons
 titutive relations using impact nanoindentation and finite elements. The p
 roposed methodolgy involves a series of iterative finite element computati
 ons to find best-fit parameters for measured indentation data (including l
 oad- and time- displacement curves and measured residual indent shapes). T
 here is a particular emphasis on the sensitivity of the predictions to var
 ious constitutive relations\, while the effects of friction\, anisotropy a
 nd boundary conditions are discussed. The suitability of this approach (i.
 e. the developed procedures and algorithms) are highlighted here using cop
 per test specimens.
LOCATION:Mott Seminar Room\, Cavendish Laboratory\, Department of Physics
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