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Sliding contact fracture of dental ceramics: Principles and validation

Paper ID Volume ID Publish Year Pages File Format Full-Text
434 42 2014 11 PDF Available
Title
Sliding contact fracture of dental ceramics: Principles and validation
Abstract

Ceramic prostheses are subject to sliding contact under normal and tangential loads. Accurate prediction of the onset of fracture at two contacting surfaces holds the key to greater long-term performance of these prostheses. In this study, building on stress analysis of Hertzian contact and considering fracture criteria for linear elastic materials, a constitutive fracture mechanics relation was developed to incorporate the critical fracture load with the contact geometry, coefficient of friction and material fracture toughness. Critical loads necessary to cause fracture under a sliding indenter were calculated from the constitutive equation, and compared with the loads predicted from elastic stress analysis in conjunction with measured critical load for frictionless normal contact—a semi-empirical approach. The major predictions of the models were calibrated with experimentally determined critical loads of current and future dental ceramics after contact with a rigid spherical slider. Experimental results conform with the trends predicted by the models.

Graphical abstractCeramics with a large fracture toughness and small elastic modulus are particularly well suited for resisting sliding contact fracture.Figure optionsDownload full-size imageDownload high-quality image (138 K)Download as PowerPoint slide

Keywords
Sliding contact fracture; Friction; Toughness; Dental ceramics; Functionally graded ceramics
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Publisher
Database: Elsevier - ScienceDirect
Journal: Acta Biomaterialia - Volume 10, Issue 7, July 2014, Pages 3243–3253
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us