Journal
POLYMER TESTING
Volume 31, Issue 7, Pages 916-925Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2012.04.013
Keywords
Natural rubber; Temperature effects; Digital image correlation (DIC) technique; Motion compensation technique; Full-field measurement; Infrared thermography
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Combining thermal and kinematic full-field measurements at the same time is gaining widespread acceptance in the community involved in the thermomechanical characterization of materials. However, obtaining such attractive information in the case of elastomers for which large deformations occur raises specific experimental issues which are addressed in this paper. The problem arises in mapping both the thermal and the kinematic quantities in the same reference coordinate system in order to write properly the heat diffusion equation. This equation provides heat sources which constitute a relevant quantity in the framework of thermomechanics. The procedure is presented and the underlying practical difficulties are detailed. It is then applied in the case of a specific test performed on a so-called three-branch specimen. Finally, the obtained strain and heat source distributions are briefly discussed. (c) 2012 Elsevier Ltd. All rights reserved.
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