A constitutive level-set model for shape memory polymers and shape memory polymeric composites

被引:0
作者
Antonios I. Arvanitakis
机构
[1] University of Ioannina,Laboratory of Mathematical Modeling and Scientific Computing, Department of Materials Science and Engineering
来源
Archive of Applied Mechanics | 2019年 / 89卷
关键词
Constitutive level-set model; Phase transitions; Shape memory polymers; Shape memory polymeric composites; Triple-shape memory effect; One-step-fixing shape memory behavior;
D O I
暂无
中图分类号
学科分类号
摘要
This work proposes a new constitutive model for shape memory polymers and shape memory polymeric composites under the use of level-set functions as additional variables of state. The model regards shape memory polymers as inhomogeneous bodies consisting of two different phases, an active (rubbery elastic) phase and a frozen (glassy elastic) phase. Introducing the level-set function provides the potential to describe the interface separating the two distinct phases in an implicit manner. Under proper thermodynamical arguments, an appropriate evolution equation is derived that provides the tool to describe phase transformations in shape memory polymers. Furthermore, an extended model version is developed that applies in shape memory polymeric composites by introducing two (or more) level-set functions so as to represent implicitly three (or more) material phases capturing the behavior of multi-shape memory polymers. The level-set constitutive equations are formulated in three dimensions, although the one-dimensional case is adopted and analyzed thoroughly. The reproduction of the shape memory thermomechanical cycles of polymers and polymeric composites provides validity and credibility to the current model.
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页码:1939 / 1951
页数:12
相关论文
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