Abstract:
The purpose of this thesis was to study the behavior of
belleville spring under axisynmetric axial canpression by using the
finite element method and compare it with the results from Almen and
Laszlo's equation and thin plate theory equation. The spring under
investigation consists of flat type and tilted type with internal cone
height equals to half of its thickness.
The finite element map used in modelling the belleville spring
utilized 256 constant strain triangular finite elements, which have
165 nodes and. 330 degrees of freedan. The finite element program was
written in M-Basic language.
Comparing the results from Almen and Laszlo equations with
the results from finite element method it was found that the belleville
spring with the ratio of outside diameter to inside dianeter equals to
4.0 and 0.04 inch thick gave lowest error in spring deflection. They
were 0.35% and -5.22% for the case of flat-spring and. tilted -spring
respectiveiy. And results from the stress investigation in the flat
spring showed that the lowest error in tangential stress was 3 .6% for
the bellevillve spring with the ratio of outside dianeter to inside
diameter equals to 2.5 and 0.02 inch and 0 .04 inch thick.