1. A unify analysis of isotropic and composite Belleville Spring
P R O J E C T
Engineering
EP-25XX-X-XX
A unify analysis of isotropic and composite Belleville Spring
Project Members:
Xxxxxxxxxx Xxxxxxxxxx Bxxxxxxx
Xxxxxxxxxx Xxxxxxxxxx Bxxxxxxx
Project Advisor:
Assoc. Prof. Dr.Xxxxxxxxxx Xxxxxxxxxx
School of Mechanical Engineering, Institute of Engineering,
Suranaree University of Technology

2. Backgrounds Fig.1 Belleville spring Fig.2 Composite material
P R O J E C T
Engineering
Backgrounds
Fig.1 Belleville spring
Fig.2 Composite material
Fig.3 Composite Belleville spring
Fig.4 Load & Deflection curve
Fig.5 Stackable Belleville spring
Fig.6 Modulus vs Density

3. Belleville spring geometry
P R O J E C T
Engineering
Previous research
Load & Deflection Relation
Belleville spring geometry
*Almen J.O. and Laszlo A., 1936, “The uniform-section disk spring”, Transaction of the ASME., Vol 58, pp

4. Energy method Strain energy equation Displacement functions
P R O J E C T
Engineering
Energy method
Strain energy equation
Displacement functions
*for axisymmetric analysis (n=0)
The total potential energy of Belleville spring
Work done by external loads
Boundary condition

5. P R O J E C T
Engineering
Results
Load and deflection curve of Belleville spring having a negative rate
(Di/Do=0.51, h/Do=0.0208, h/t=1.49, t/L=0.057, b =4.86o)
Load and deflection curve of Belleville spring loaded at various locations
(Di/Do=0.469, h/Do=0.0238, h/t=1.72, t/L=0.0508, b =5.02o)
Deflection of Belleville spring along the radial distance
(Di/Do=0.35, h/Do=0.05, h/t=3.3, t/L=0.0461, b =8.75o)
Load and deflection curve of very large deformation
(Di/Do=0.35, h/Do=0.2, h/t=5.3, t/L=0.0989, b =31.61o)

6. Conclusions
P R O J E C T
Engineering
Very good agreement between testing, FEM and predicted results from energy equation.
Capture the effect of h/Do ratio that has been missing from Almen and Laszlo equation.
Can adapt this scheme for advanced disk spring in the future.

7. Engineering
P R O J E C T
THANK YOU
Q & A

8. Project Plan Activities 1 Survey the project information 2
Engineering
Activities
Week 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Week 9
Week 10
Week 11 1
Survey the project information 2
Practice on software and validation 3
Create CAD models 4
Simulate the air flow 5
Conclusion and Report writing