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Assessment of fracture toughness in ornamental stones

International Journal of Rock Mechanics & Mining Sciences

Amaral, P. M.; Rosa, L. G.; Fernandes, J. C. — 2008 — Elsevier

Key information

Authors:

Amaral, P. M. (Pedro Miguel Gomes Abrunhosa Amaral); Rosa, L. G. (Luís Manuel Guerra da Silva Rosa); Fernandes, J. C. (José Jorge Lopes da Cruz Fernandes)

Published in

January 1, 2008

Abstract

This paper describes the advantages and disadvantages of using different methodologies that apply bending fixtures for determining the fracture toughness of different stones. In general, the experimental results tend to show less variability when applying a 4-point bending mode. The comparison of the results obtained using the different experimental procedures also has stressed the great importance of using sharp notches in order to avoid overestimation of fracture toughness. This specific aspect has been also analysed in detail by performing a fractographic examination of unnotched bar specimens submitted to a 4-point bending test. This procedure shows how it is possible to locate and measure the origin of fracture, which contributes, among other things, to discuss the failure mechanisms of stones. Fracture toughness values also have been estimated via fractographic examination and the results compared with those obtained when applying the experimental methodologies.

Publication details

Authors in the community:

Publication version

AO - Author's Original

Publisher

Elsevier

Link to the publisher's version

https://www.sciencedirect.com/science/article/pii/S1365160907001153?via%3Dihub

Title of the publication container

International Journal of Rock Mechanics & Mining Sciences

First page or article number

554

Last page

563

Volume

45

Issue

4

ISSN

1365-1609

DOI

10.1016/j.ijrmms.2007.05.009

WoS (Web of Science)

WOS:000255622100008

Fields of Science and Technology (FOS)

materials-engineering - Materials engineering

Keywords

  • Fracture toughness
  • Fractography
  • Rock mechanics
  • Liner elastic fracture mechanics

Publication language (ISO code)

eng - English

Alternative identifier (URI)

http://www.scopus.com/inward/record.url?eid=2-s2.0-40649095270&partnerID=MN8TOARS

Rights type:

Only metadata available

Creative Commons license

CC-BY-NC-ND - Attribution-NonCommercial-NoDerivatives