A thermoviscoelastic finite deformation constitutive model based on dual relaxation mechanisms for amorphous shape memory polymers
作者机构：State Key Laboratory of Mechanics and Control of Mechanical StructuresNanjing University of Aeronautics and AstronauticsNanjingChina Jiangsu Key Laboratory of Advanced Structural Materials and Application TechnologySchool of Materials Science and EngineeringNanjing Institute of TechnologyNanjingChina School of Physical and Mathematical SciencesNanjing Tech UniversityNanjingChina School of EngineeringRoyal Melbourne Institute of TechnologyMelbourneAustralia
出 版 物：《International Journal of Smart and Nano Materials》 (国际智能和纳米材料杂志（英文）)
年 卷 期：2023年第14卷第2期
页 面：243-264页
核心收录：
学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）]
基 金：This work is supported by the National Natural Science Foundation of China(Grant No.:12202181) the Natural Science Foundation of Jiangsu Province of China(Grant No.:BK20220325) the Fund of Prospective Layout of Scientific Research for Nanjing University of Aeronautics and Astronautics
主 题：Shape memory polymers constitutive model dual relaxation mechanisms viscous flow rules internal stress model
摘 要：This paper proposes a new thermoviscoelastic finite deformation model incorporating dual relaxation mechanisms to predict the complete thermo-mechanical response of amorphous shape memory *** model is underpinned by the detailed microscopic molecular mechanism and effectively reflects the current understanding of the glass transition *** evolution rules are obtained from the model to characterize the viscous flow,and a new theory named an internal stress model is introduced and combined with the dual relaxation mechanisms to capture the stress *** rationality of the constitutive model is verified as the theoretical results agree well with the experimental ***,the constitutive model is further simplified to facilitate engineering applications,and it can roughly capture the characteristics of shape memory polymers.
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