Substrate Creep on The Fatigue Life of A Model Dental Multilayer Structure

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In this paper, we investigated the effects of substrate creep on the fatigue behavior of a model dental multilayer structure, in which a top glass layer was bonded to a polycarbonate substrate through a dental adhesive. The top glass layers were ground using 120 grit or 600 grit sand papers before bonding to create different sub-surface crack sizes and morphologies. The multilayer structures were tested under cyclic Hertzian contact loading to study crack growth and obtain fatigue life curves. The experiment results showed that the fatigue lives of the multilayer structures were impaired by increasing crack sizes in the sub-surfaces. ... continued below

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PDF-file: 27 pages; size: 1.5 Mbytes

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Zhou, J; Huang, M; Niu, X & soboyejo, W October 9, 2006.

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In this paper, we investigated the effects of substrate creep on the fatigue behavior of a model dental multilayer structure, in which a top glass layer was bonded to a polycarbonate substrate through a dental adhesive. The top glass layers were ground using 120 grit or 600 grit sand papers before bonding to create different sub-surface crack sizes and morphologies. The multilayer structures were tested under cyclic Hertzian contact loading to study crack growth and obtain fatigue life curves. The experiment results showed that the fatigue lives of the multilayer structures were impaired by increasing crack sizes in the sub-surfaces. They were also significantly reduced by the substrate creep when tested at relatively low load levels i.e. P{sub m} < 60 N (Pm is the maximum magnitude of cyclic load). But at relatively high load levels i.e. P{sub m} > 65 N, slow crack growth (SCG) was the major failure mechanisms. A modeling study was then carried out to explore the possible failure mechanisms over a range of load levels. It is found that fatigue life at relatively low load levels can be better estimated by considering the substrate creep effect (SCE).

Physical Description

PDF-file: 27 pages; size: 1.5 Mbytes

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  • Journal Name: Journal of Biomedical Materials Research, vol. 82B, no. 2, August 1, 2007, pp. 374-382; Journal Volume: 82B; Journal Issue: 2

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  • Report No.: UCRL-JRNL-225345
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 914616
  • Archival Resource Key: ark:/67531/metadc888402

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 9, 2006

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 2, 2016, 1:07 p.m.

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Zhou, J; Huang, M; Niu, X & soboyejo, W. Substrate Creep on The Fatigue Life of A Model Dental Multilayer Structure, article, October 9, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc888402/: accessed November 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.