Characterization of time-dependent mechanical behaviors of dental composites by DIC

研究成果: Conference contribution

摘要

Dental resin composites are widely applied in dental restoration. These resin composites have some problems due to shrinkage occurred. Since shrinkage stress could be presented by resin matrix polymerization as tensile stress and causes structure failure. In this study, four types of dental composites (Z350 flow, universal composite Z250, packable composite P60, and low-shrinkage composite LS) were chosen to investigate their tensile creep and recovery behavior. The specimens were divided into two groups: (1) after curing about 5 min, and (2) stored in artificial saliva for 30 days. With force control, the specimen image under uni-axial tension was recorded and analyzed by using digital image correlation (DIC) method. Four-parameter fluid model is found applicable to fit the experimental obtained strain. The results showed that the longitudinal strain of 5-min case has higher creep and residual strain than that of 30 days. The creep of LS was the smallest in four resin composites. The Poisson’s ratio of 5-min case was increased about 0.5 with time except for LS. However, the Poisson’s ratio of 30-day cases varied up and down insignificantly with time.

原文English
主出版物標題Advancement of Optical Methods in Experimental Mechanics - Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics
編輯Helena Jin, Luciano Lamberti, Sanichiro Yoshida, Cesar Sciammarella
發行者Springer New York LLC
頁面191-196
頁數6
ISBN(列印)9783319069852
DOIs
出版狀態Published - 2015
事件Annual Conference on Experimental and Applied Mechanics, 2014 - Greenville, United States
持續時間: 2014 六月 22014 六月 5

出版系列

名字Conference Proceedings of the Society for Experimental Mechanics Series
3B
ISSN(列印)2191-5644
ISSN(電子)2191-5652

Other

OtherAnnual Conference on Experimental and Applied Mechanics, 2014
國家/地區United States
城市Greenville
期間14-06-0214-06-05

All Science Journal Classification (ASJC) codes

  • 工程 (全部)
  • 計算力學
  • 機械工業

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