Finite Element Based Improved Characterization of ... · Dynamic Mechanical Analysis Fig 1. Dynamic...
Transcript of Finite Element Based Improved Characterization of ... · Dynamic Mechanical Analysis Fig 1. Dynamic...
Finite Element Based Improved
Characterization of Viscoelastic Materials
Xianfeng Song, Stefan Dircks, Daniil Mirosnikov and Benny Lassen
Overview
Introduction
Dynamic Mechanical Analysis
Image Processing
Theory
COMSOL Implementation
Results
Conclusion
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Introduction
Viscoelastic Material
Material Characterization
Hyper-elastic Models
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Dynamic Mechanical Analysis
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Measurement of Force and Displacement
Fig 1. Dynamic Mechanical Analysis ResultDynamic Mechanical Analysis
Image Processing
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Stretch
Undeformed
DeformedFig 2. Image Processing Setup
Image Processing
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Stretch
Undeformed
DeformedFig 3. Distance between two
dots
Theory
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Fig 4. General coordinate system with
deformed and undeformed bodies.
COMSOL Implementation
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Time Dependent Weak Form PDE
Global ODEs and DAEs
Domain Point Probes
Boundary Conditions
Fig 6. The time-dependent lower
boundary condition. Fig 5. Geometry model including two probes.
COMSOL Implementation
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Results
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Comparison between DMA Test and Numerical Model
Results
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Comparison of Different Hyperelastic Models
Conclusion
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From the results of the COMSOL
simulations, all of the hyperelastic models
exhibit the correct trend of the non-linear
behavior of the material. However, the
Arruda-Boyce hyper-elastic material model
proves to be the most accurate of the
chosen.
Thank you!
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