N. Audebert et al., BUCKLING OF AUTOMATIC-TRANSMISSION CLUTCH PLATES DUE TO THERMOELASTICPLASTIC RESIDUAL-STRESSES/, Journal of thermal stresses, 21(3-4), 1998, pp. 309-326
The plates of multidisk automatic transmission are known to buckle und
er extreme operating conditions. Axisymmetric (coning) and nonaxisymme
tric (potato chip) modes can be obtained It is shown that these modes
result from in-plane axisymmetric residual bending moments in the disk
and the critical value for each mode is found. A numerical algorithm
is then developed to determine the residual moment due to a prescribed
axisymmetric thermal history. Allowance is made for the temperature d
ependence of yield stress, elastic modulus, and coefficient of thermal
expansion. The results show that susceptibility to buckling depends o
n a dimensionless geometric shape factor, the material properties, and
the magnitude of the largest thermal excursion. With steel disks and
typical design values for the shape parameter; buckling is predicted f
or temperature differences of about 600 degrees C between inner and ou
ter radii.