Discrete dislocation modelling of submicron indentation Conference Paper

abstract

• Indentation of a planar single crystal by a circular rigid indenter is analyzed using discrete dislocation plasticity. The crystal has three slip systems and is initially dislocation-free, but edge dislocations can nucleate from point sources inside the crystal. The lattice resistance to dislocation motion, the interaction with point obstacles and dislocation annihilation are incorporated through a set of constitutive rules. Indentation is displacement driven and at each stage of the loading history, a boundary-value problem is solved for the evolution of the indentation pressure and the contact size. Preliminary results are presented for various values of the density of dislocation sources. 2005 Elsevier B.V. All rights reserved.

authors

• Needleman, Alan

published proceedings

• MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

author list (cited authors)

• Widjaja, A., Van der Giessen, E., & Needleman, A.

citation count

• 38

complete list of authors

• Widjaja, A||Van der Giessen, E||Needleman, A

publication date

• January 2005

publisher

• Elsevier  Publisher

published in

• Materials Science & Engineering: A  Journal

keywords

• Discrete Dislocations
• Nanoindentation
• Size Effects

Digital Object Identifier (DOI)

• 10.1016/j.msea.2005.01.074

start page

• 456

end page

• 459

volume

• 400

issue

• 1-2 SUPPL.

URL

• http%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.msea.2005.01.074