On internal cone cracks induced by conical indentation in brittle materials

J. YAN, A.M. KARLSSON*, X. CHEN

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

14 Citations (Scopus)

Abstract

The conditions for cone cracks to develop due to a conical indentation are investigated. Axisymmetric numerical simulations, based on the finite element method, are conducted, assuming a linear-elastic, perfectly plastic material. A superposition scheme is employed to simulate a range of crack geometries, including various lengths and orientations. The results indicate that the class of cracks investigated is prone to develop internally in brittle materials. Based on a reversed analysis, a new technique is proposed for measuring the fracture toughness in bulk material and thick coatings through one simple indentation test when the cone crack appears. © 2006 Elsevier Ltd. All rights reserved.
Original languageEnglish
Pages (from-to)2535-2546
Number of pages12
JournalEngineering Fracture Mechanics
Volume74
Issue number16
Early online date23 Jan 2007
DOIs
Publication statusPublished - Nov 2007
Externally publishedYes

Bibliographical note

The work of J.Y. and A.M.K. is supported by NSF DMR-0346664. The work of X.C. is supported by NSF CMS-0407743.

Keywords

  • Cone cracks
  • Finite element analysis
  • Instrumented indentation

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