The tensor equations of elasticity in nonorthogonal curvilinear coordinates are presented in a form suitable for the method of dynamic relaxation. This method is described briefly and then is applied to the solution of the problem of elastic deformation of curved mirrors.
A. J. Malvick, "Dynamic Relaxation: a General Method for Determination of Elastic Deformation of Mirrors," Appl. Opt. 7, 2117-2121 (1968)