Publication detail

Comparison of Solutions of Stress Field based on Hertzian and Combined Numerical-Crystallographic Approaches beneath Nanoindenter

HORNÍKOVÁ, J. ŠANDERA, P. POKLUDA, J.

Original Title

Comparison of Solutions of Stress Field based on Hertzian and Combined Numerical-Crystallographic Approaches beneath Nanoindenter

Type

conference paper

Language

English

Original Abstract

Nanoindentation is considered to be a very promising experimental approach to measuring the ideal shear strength since the stressed volume beneath the sharp indenter may be defect-free. The local shear component of the stress reaches its maximum value at some close distance from the indenter in the bulk. The value of the stress can reach the ideal shear strength and, consequently become high enough to nucleate dislocations. This process might be detected as a pop-in on the nanoindentation load-displacement curve. To model the nanoindentation test for that purpose, three different approaches have been used in this works. The first approach is based on the analytical Hertzian solution of the stress field beneath the nanoindenter where only a continuum mechanics is taken into account. The second concept is based on the numerical solution without crystallographic considerations and the third one respects the fact that the dislocation generation in the substrate is subjected to crystallographic rules. The aim of this article is to compare all these concepts by their application to the nanoindentation process performed on selected bcc and fcc metallic substrates.

Keywords

Nanoindentation; Hertzian approach; Numerical solution; Pop-in effect; Crystallography

Authors

HORNÍKOVÁ, J.; ŠANDERA, P.; POKLUDA, J.

RIV year

2012

Released

1. 2. 2012

ISBN

978-3-03785-218-7

Book

Advances in Fracture and Damage Mechanics X

Edition

1

Edition number

1

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

488-489

Number

1

State

Swiss Confederation

Pages from

395

Pages to

398

Pages count

4

BibTex

@inproceedings{BUT76126,
  author="Jana {Horníková} and Pavel {Šandera} and Jaroslav {Pokluda}",
  title="Comparison of Solutions of Stress Field based on Hertzian and Combined Numerical-Crystallographic Approaches beneath Nanoindenter",
  booktitle="Advances in Fracture and Damage Mechanics X",
  year="2012",
  series="1",
  journal="Key Engineering Materials (print)",
  volume="488-489",
  number="1",
  pages="395--398",
  isbn="978-3-03785-218-7",
  issn="1013-9826"
}