Indentation testing of a brittle material using a notionally 'sharp' indenter may reveal several important physical properties, including fracture toughness, surface finish information-and the residual stress state. In the case of shallow cone indenters, the contact and fracture mechanics is well defined and closed-form solutions exist in elasticity theory. However, no real indenter is atomically sharp, and the scope of the present article is to quantify how a finite apex radius may modify the stress state induced by a conical indenter. In particular, implications for the load-displacement relation, occurrence of yielding and maximum contact pressure induced are found. A brief discussion of the influence of edge radius on the flat-ended indenter, once used to induce Hertzian type ring cracks, is also included, as this may be treated by a similar procedure

The influence of the indenter tip-radius on indentation testing of brittle materials / Ciavarella, M; Hills, Da. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - STAMPA. - 19:2(1999), pp. 239-245. [10.1016/S0955-2219(98)00188-5]

The influence of the indenter tip-radius on indentation testing of brittle materials

Ciavarella M;
1999-01-01

Abstract

Indentation testing of a brittle material using a notionally 'sharp' indenter may reveal several important physical properties, including fracture toughness, surface finish information-and the residual stress state. In the case of shallow cone indenters, the contact and fracture mechanics is well defined and closed-form solutions exist in elasticity theory. However, no real indenter is atomically sharp, and the scope of the present article is to quantify how a finite apex radius may modify the stress state induced by a conical indenter. In particular, implications for the load-displacement relation, occurrence of yielding and maximum contact pressure induced are found. A brief discussion of the influence of edge radius on the flat-ended indenter, once used to induce Hertzian type ring cracks, is also included, as this may be treated by a similar procedure
1999
The influence of the indenter tip-radius on indentation testing of brittle materials / Ciavarella, M; Hills, Da. - In: JOURNAL OF THE EUROPEAN CERAMIC SOCIETY. - ISSN 0955-2219. - STAMPA. - 19:2(1999), pp. 239-245. [10.1016/S0955-2219(98)00188-5]
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/9868
Citazioni
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 7
social impact