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

Research output: Chapter in Book/Report/Conference proceedingConference contribution


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.

Original languageEnglish
Title of host publicationAdvancement of Optical Methods in Experimental Mechanics - Proceedings of the 2014 Annual Conference on Experimental and Applied Mechanics
EditorsHelena Jin, Luciano Lamberti, Sanichiro Yoshida, Cesar Sciammarella
PublisherSpringer New York LLC
Number of pages6
ISBN (Print)9783319069852
Publication statusPublished - 2015
EventAnnual Conference on Experimental and Applied Mechanics, 2014 - Greenville, United States
Duration: 2014 Jun 22014 Jun 5

Publication series

NameConference Proceedings of the Society for Experimental Mechanics Series
ISSN (Print)2191-5644
ISSN (Electronic)2191-5652


OtherAnnual Conference on Experimental and Applied Mechanics, 2014
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Computational Mechanics
  • Mechanical Engineering


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