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The effect of barium titanate ceramic loading on the stress relaxation behavior of barium titanate‐silicone elastomer composites
Author(s) -
Cholleti Eshwar Reddy,
Stringer Jonathan,
Kelly Piaras,
Bowen Chris,
Aw Kean
Publication year - 2020
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.25539
Subject(s) - materials science , barium titanate , composite material , elastomer , hyperelastic material , ceramic , stress relaxation , silicone , relaxation (psychology) , stress (linguistics) , composite number , creep , structural engineering , psychology , social psychology , linguistics , philosophy , finite element method , engineering
Abstract The stress relaxation behavior of barium titanate (BTO)‐elastomer (Ecoflex) composites, as used in large strain sensors, is studied using the generalized Maxwell‐Wiechert model. In this article, we examine the stress relaxation behavior of ceramic polymer composites by conducting stress relaxation tests on samples prepared with varying the particle loading by 0, 10, 20, 30, and 40 wt% of 100 and 200 nm BTO ceramic particles embedded in a Ecoflex silicone‐based hyperelastic elastomer. The influence of BTO on the Maxwell‐Wiechert model parameters was studied through the stress relaxation results. While a pristine Ecoflex silicone elastomer is predominantly a hyperelastic material, the addition of BTO made the composite behave as a visco‐hyperelastic material. However, this behavior was shown to have a negligible effect on the electrical sensing performance of the large strain sensor.