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Modeling the Viscoelastic Behavior of Amorphous Shape Memory Polymers at an Elevated Temperature
- Source :
- Fluids; Volume 1; Issue 2; Pages: 15
- Publication Year :
- 2016
- Publisher :
- MDPI AG, 2016.
-
Abstract
- Shape memory polymers (SMPs) are soft active materials, their special property is the ability to hold a temporary shape and when exposed to a suitable trigger, they come back to their original shape. These external stimuli can be temperature, light or electro-magnetic fields. Amorphous SMPs are a class of thermally-activated SMPs that rely on glass transition to retain their temporary shape. Above the glass transition temperature (T > Tg), (amorphous SMPs exhibit finite deformation and viscoelastic behavior. In this work we develop a model to capture the viscoelastic behavior of the amorphous SMPs at elevated temperatures. The model uses an approach that was initially developed to study non-Newtonian viscoelastic fluids. We accomplish this by developing a multi-branch model based on the theory of multiple natural configurations using the maximization of the rate dissipation to determine the evolution of the natural configurations. We apply our model to study several different deformations at an elevated temperature T = 130 °C and show that this approach is able to capture the viscoelastic behavior of these polymers. The predictions of the theory are then compared with experimental results.
- Subjects :
- Fluid Flow and Transfer Processes
chemistry.chemical_classification
Work (thermodynamics)
Materials science
Mechanical Engineering
02 engineering and technology
Polymer
Dissipation
021001 nanoscience & nanotechnology
Condensed Matter Physics
viscoelastic solids
shape memory polymer
multiple relaxation mechanisms
Viscoelasticity
Amorphous solid
Shape-memory polymer
020303 mechanical engineering & transports
0203 mechanical engineering
chemistry
Composite material
Deformation (engineering)
0210 nano-technology
Glass transition
Subjects
Details
- ISSN :
- 23115521
- Volume :
- 1
- Database :
- OpenAIRE
- Journal :
- Fluids
- Accession number :
- edsair.doi.dedup.....6da690e8fb79e822a58a9228a36b3633