Kim, Jinsu Jeon, Seung-Yeol Hong, Seokbin An, Yongsan Park, Haedong Yu, Woong-Ryeol 2024-01-19T15:30:25Z 2024-01-19T15:30:25Z 2021-09-04 2021-03 0964-1726 https://pubs.kist.re.kr/handle/201004/117363 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. English IOP PUBLISHING LTD Three-dimensional constitutive model for shape-memory polymers considering temperature-rate dependent behavior Article 10.1088/1361-665X/abe1d0 1 SMART MATERIALS AND STRUCTURES, v.30, no.3 SMART MATERIALS AND STRUCTURES 30 3 scie scopus 000619787100001 2-s2.0-85102385420 Instruments & Instrumentation Materials Science, Multidisciplinary Instruments & Instrumentation Materials Science Article constitutive model shape-memory polymers temperature-rate dependence thermal strain thermomechanical behavior