solidworks simulation non linear elastomer analysis
TRANSCRIPT
SOLIDWORKS NONLINEAR FEA ANALYSIS OF AN
ELASTOMERIC MATERIALSIMPLE TEST CASE
8/8/2013Don Blanchet3B [email protected]
Sampleparts
GOALS Demonstrate the use of Solidworks
Simulation 2012 Non-linear module. Apply a displacement boundary
condition and calculate the reaction load produced by rubber compression.
Show the hydraulic behavior of the silicone rubber , Poisson’s ratio = 0.495
Model – stack up case
aluminum
Silicone rubber
2.0 x 2.0 x 2.5 inches
0.5Thick
5 pieces
Boundary Conditions
Forced displacement +Z =.075
fixed
roller surfacesAluminum
edges
FEA model 500 step displacement equilibrium
iterations. Achieve Stability at each solution step
for the very flexible rubber with nonlinear behavior.
If the solution diverges try a smaller step size.
Considerable compute resources may be required.
Metal vs. Elastomer
0 50 100 150 200 25010
100
1000
10000
100000
Typical Stress Strain CurvesRUBBER ALUMINUM
STRAIN , PERCENT
STRE
SS, p
si
ElastomersExhibit property variation
WithTemperature and
Strain application rate
Elastomer nonlinear elastic modulus at room
temperature
0 50 100 150 200 2500
200
400
600
800
1000
1200
Typical Stress Strain Curve for rubber
STRAIN , PERCENT
STRE
SS, p
si
This dataIs often
Difficult to obtainConsidered vendor
Proprietary in many cases
Displacement results
Forced displacement +Z =.075
Stress results
Reaction force at base 167 lbs
Displacement results
RubberHydraulic
Bulge deformation
Forced Displacement
Conclusion Solidworks Simulation 2012
Nonlinear module is effective for static analysis of assemblies with rubber components.