Impact of thin nanoengineered coatings on the stress-strain state of cylindrical cladding made from Zr-based alloys for nuclear fuel elements

摘要

A current problem concerning the use of thin nanoengineered coatings for increasing operability of nuclear fuel cladding made from widely used zirconium-based alloys is considered from the point of view of the mechanical elastic interaction between the coating and the cladding. A mathematical model of thin coatings on a cylindrical cladding is presented in the form of special boundary conditions of the equations of elasticity theory that define the stress-strain state of the cladding. It is shown that thin coatings can noticeably decrease stresses in the cladding.