Deformation behavior of rotating disks with thin high-modulus coatings.

Based on equations of linear three-dimensional elasticity theory, a problem is stated for the design calculation for rotating disks with hardening coatings, allowing for boundary layers formed. A numerical integration method is proposed for the stated problem, and some particular calculations are performed. Discussion of the calculated stress fields in the disk base material and coatings provides an explanation of some effects revealed, such as a significant improvement of load-carrying capacity of disks when face-coated with high-modulus layers of about 0.1–0.6 mm in thickness and a deterioration of this parameter (in some cases) when thicker coatings are applied. The authors study the applicability range of the conventional theory of disk strength calculation which assumes a two-dimensional stressed state and no boundary layers. [ABSTRACT FROM AUTHOR]