Journal
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
Volume 27, Issue 5, Pages 625-641Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X15575086
Keywords
Shape memory composite; shape memory alloy; shape memory polymer; constitutive modeling; shape memory effect; superelasticity; analytical modeling; thermo-mechanical response
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Funding
- Natural Sciences and Engineering Research Council (NSERC) of Canada
- Canada Research Chairs Program
- Canada Foundation of Innovation
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Multifunctional shape memory composites composed of shape memory polymers and shape memory alloys exhibit superior shape memory properties; therefore, it is of great interest to researchers to model their thermo-mechanical behavior numerically. Although a number of constitutive models of shape memory alloys and shape memory polymers have been developed, very few models have been developed for shape memory composites and validated with experimental data. In this study, we first review separately constitutive models of shape memory alloys and shape memory polymers developed in previous studies. Both models were validated with thermo-mechanical tests conducted on a shape memory alloy fiber and shape memory polymer, respectively. A constitutive model for the shape memory composite was then developed utilizing the homogenization scheme. Shape memory composites containing 0.5% or 1% of the shape memory alloy fiber volume content embedded in the shape memory polymer matrix were fabricated. Thermo-mechanical tests were carried out on these shape memory composites to validate the proposed constitutive model. The experimental results showed that the proposed shape memory composite model was able to predict the general trend of the thermo-mechanical behavior of the shape memory composites.
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