Application of mixed-mode fracture criteria for weakest-link failure prediction for ceramic materials

Huibert F. Scholten, Leonaraus J. Dortmans, Gijsbertus de With

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

A set of combined experimental and numerical data is presented for the prediction of multiaxial strength for ceramics. Uniaxial and biaxial bend tests were performed on ten different materials. The strength predicted with various mixed-mode fracture criteria was compared with the measured values. A main conclusion was that with the introduction of an additional parameter, a 'size-independent strength', all tests were predicted within 3 % accuracy. However, different criteria had to be used, which could not be interchanged between the various materials. The 'size-independent strength' parameter is interpreted as a measure for the applicability of the weakest-link concept. Its physical meaning is yet uncertain, but predictions on materials for which the porosity was less than one percent showed that for these materials the deviations are largest. This could indicate that basic assumptions in the weakest-link models applied with respect to defect density are violated for these materials.

Original languageEnglish
Title of host publicationLife prediction methodologies and data for ceramic materials
EditorsC.R. Brinkman, S.F. Duffy
Place of PublicationPhiladelphia
PublisherAmerican Society for Testing and Materials
Pages192-206
Number of pages15
ISBN (Print)0803118643
Publication statusPublished - 1 Dec 1994
EventSymposium on Life Prediction Methodologies and Data for Ceramic Materials - Cocoa Beach, FL, USA
Duration: 11 Jan 199313 Jan 1993

Publication series

NameASTM STP
Volume1201

Conference

ConferenceSymposium on Life Prediction Methodologies and Data for Ceramic Materials
CityCocoa Beach, FL, USA
Period11/01/9313/01/93

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