The initiation of ring cracking in ceramic coatings indented by an elastic sphere

Kazuo Hayashi, Fang Yuan

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


An elastic-plastic finite element analysis is presented for the axisymmetric problem of friction-less indentation of an elastic sphere into a half-space with a ceramic coating. The analysis is performed for a variety of combinations of material properties, i.e. elastic modulus, strain-hardening exponent and yield stress, for both the coating and the substrate. Results for stresses on the surface and residual stresses after unloading are presented. The effect of elastic moduli, strain-hardening exponents and yield stresses of the coating and substrate on the stresses is examined in detail. Finally, the ring crack initiation on the ceramic coating surface is discussed, emphasizing especially the critical load for the ring crack initiation.

Original languageEnglish
Pages (from-to)30-35
Number of pages6
JournalNihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Issue number617
Publication statusPublished - 1998


  • Ceramics
  • Coating
  • Contact problem
  • Finite element method
  • Indentation
  • Ring crack

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering


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