finite element based improved characterization of ... · dynamic mechanical analysis fig 1. dynamic...
TRANSCRIPT
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Finite Element Based Improved
Characterization of Viscoelastic Materials
Xianfeng Song, Stefan Dircks, Daniil Mirosnikov and Benny Lassen
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Overview
Introduction
Dynamic Mechanical Analysis
Image Processing
Theory
COMSOL Implementation
Results
Conclusion
Oktober 20162
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Introduction
Viscoelastic Material
Material Characterization
Hyper-elastic Models
Oktober 20163
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Dynamic Mechanical Analysis
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Measurement of Force and Displacement
Fig 1. Dynamic Mechanical Analysis ResultDynamic Mechanical Analysis
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Image Processing
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Stretch
Undeformed
DeformedFig 2. Image Processing Setup
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Image Processing
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Stretch
Undeformed
DeformedFig 3. Distance between two
dots
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Theory
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Fig 4. General coordinate system with
deformed and undeformed bodies.
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COMSOL Implementation
Oktober 20168
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.
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COMSOL Implementation
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Results
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Comparison between DMA Test and Numerical Model
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Results
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Comparison of Different Hyperelastic Models
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Conclusion
Oktober 201612
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.
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Thank you!
Oktober 201613