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

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

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. 305-314.

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

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)

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.

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

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