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Experimental and analytical study of surface fatigue life in dental composites

Lookup NU author(s): Simon Marandu, Dr Gunmo Gu


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The surface fatigue life of a dental composite is studied using invitro tests and analytic models. A mechatronic rolling-ball device with condition monitoring and automated data sampling is used to measure the fatigue life. The Hertzian stress theory is used to analytically estimate the deformation stress induced in the specimen, then the Basquin equation is used to predict the fatigue life based on the deformation stress. The experimental and analytic results are in good agreement. The results are also consistent with previous researches using the conventional rolling-ball device. The study shows that analytic models can bridge the gap between invivo and invitro testing by providing accurate estimates of fatigue lifetime and guiding the design of invitro experiments.

Publication metadata

Author(s): Marandu SI, Gu G, Bicker R

Publication type: Article

Publication status: Published

Journal: Journal of Composite Materials

Year: 2016

Volume: 50

Issue: 16

Pages: 2203-2214

Print publication date: 01/07/2016

Online publication date: 04/09/2015

Acceptance date: 01/01/1900

ISSN (print): 0021-9983

ISSN (electronic): 1530-793X

Publisher: Sage


DOI: 10.1177/0021998315602942


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