Three-dimensional constitutive model for shape-memory polymers considering temperature-rate dependent behavior

Three-dimensional constitutive model for shape-memory polymers considering temperature-rate dependent behavior

The temperature-rate dependent thermomechanical behavior of shape-memory polymers (SMPs) is challenging to study, because the microstructure of SMPs cannot rearrange instantaneously to an equilibrium configuration in response to temperature changes. Herein, we report a temperature-rate dependent thr...

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Veröffentlicht in:Smart materials and structures 2021-03, Vol.30 (3), p.35030
Hauptverfasser: Kim, Jinsu, Jeon, Seung-Yeol, Hong, Seokbin, An, Yongsan, Park, Haedong, Yu, Woong-Ryeol
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constitutive model
shape-memory polymers
temperature-rate dependence
thermal strain
thermomechanical behavior
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container_end_page
container_issue 3
container_start_page 35030
container_title Smart materials and structures
container_volume 30
creator Kim, Jinsu
Jeon, Seung-Yeol
Hong, Seokbin
An, Yongsan
Park, Haedong
Yu, Woong-Ryeol
description The temperature-rate dependent thermomechanical behavior of shape-memory polymers (SMPs) is challenging to study, because the microstructure of SMPs cannot rearrange instantaneously to an equilibrium configuration in response to temperature changes. Herein, we report a temperature-rate dependent three-dimensional constitutive model for SMPs based on a two-phase model consisting of rubbery and glassy phases. To describe the effect of temperature rate on SMPs, the variation of the volume fraction of each phase affected by temperature was considered under different temperature-rate conditions. Additionally, the temperature-rate dependent thermal strain was incorporated into the two-phase model. The developed constitutive model was validated by simulating the shape-memory behavior of SMPs, and by comparing the simulation and experimental results under different temperature-rate conditions.
doi_str_mv 10.1088/1361-665X/abe1d0
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subjects constitutive model
shape-memory polymers
temperature-rate dependence
thermal strain
thermomechanical behavior
title Three-dimensional constitutive model for shape-memory polymers considering temperature-rate dependent behavior
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