On size-effects in single crystal wedge indentation

Christian Frithiof Niordson, Jeffrey W. Kysar

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Wedge indentation in single crystals is studied numerically, with emphasis on size-effects on the micron scale. Under the assumption of a perfectly sharp wedge indenter, a linear relationship between indentation force and indentation depth would be predicted from conventional theories lacking constitutive length parameters to model sizeeffects. The problem is studied numerically using a strain gradient crystal visco-plasticity theory formulated along the lines proposed by Fleck andWillis (2009). It is shown how the force-indentation relation is affected due to size-dependence in the material. Size-effects are included in the model due to the addition of gradient terms in both the free energy as well as through a dissipation potential. The finite element solution method is presented,
which delivers the slip-rate field and the velocity-field based on two minimum principles.
Original languageEnglish
Title of host publicationProceedings of the 18th International Symposium on Plasticity & Its Current Applications
Number of pages3
PublisherNEAT Press
Publication date2012
Publication statusPublished - 2012
EventInternational Symposium on Plasticity 2012 and Its Current Applications - San Juan, Puerto Rico
Duration: 3 Jan 20128 Jan 2012

Conference

ConferenceInternational Symposium on Plasticity 2012 and Its Current Applications
CountryPuerto Rico
CitySan Juan
Period03/01/201208/01/2012

Fingerprint Dive into the research topics of 'On size-effects in single crystal wedge indentation'. Together they form a unique fingerprint.

Cite this