Mechanical characterization of PVA hydrogels' rate-dependent response using multi-axial loading

Autor: Adil Al-Mayah, Wanis Nafo
Rok vydání: 2020
Předmět:
Economics
Polymers
Macroeconomics
Social Sciences
02 engineering and technology
0203 mechanical engineering
Indentation
Materials Testing
Instrument Calibration
Composite material
Materials
Instrumentation
Shear Stresses
Tensile testing
Multidisciplinary
Viscosity
Physics
Applied Mathematics
Rate dependent
Classical Mechanics
Hydrogels
021001 nanoscience & nanotechnology
Finite element method
Deformation
Biomechanical Phenomena
Chemistry
020303 mechanical engineering & transports
Elastomers
Macromolecules
Self-healing hydrogels
Physical Sciences
Medicine
Engineering and Technology
Mechanical Stress
0210 nano-technology
Material properties
Research Article
Equipment Preparation
Materials science
Science
Amorphous Solids
Finite Element Analysis
Materials Science
Material Properties
Bioengineering
Research and Analysis Methods
Viscoelasticity
Elasticity (economics)
Damage Mechanics
Inflation Rates
Polymer Chemistry
Elasticity
Polyvinyl Alcohol
Mixtures
Acrylics
Stress
Mechanical
Gels
Mathematics
Zdroj: PLoS ONE
PLoS ONE, Vol 15, Iss 5, p e0233021 (2020)
ISSN: 1932-6203
Popis: The time-dependent properties of rubber-like synthesized and biological materials are crucial for their applications. Currently, this behavior is mainly measured using axial tensile test, compression test, or indentation. Limited studies performed on using multi-axial loading measurements of time-dependent material behavior exist in the literature. Therefore, the aim of this study is to investigate the viscoelastic response of rubber-like materials under multi-axial loading using cavity expansion and relaxation tests. The tests were performed on PVA hydrogel specimens. Three hyperelasitc models and one term Prony series were used to characterize the viscoelastic response of the hydrogels. Finite element (FE) simulations were performed to verify the validity of the calibrated material coefficients by reproducing the experimental results. The excellent agreement between the experimental, analytical and numerical data proves the capability of the cavity expansion technique to measure the time-dependent behavior of viscoelastic materials.
Databáze: OpenAIRE
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