Stability of Viscoelastic Systems Subjected to Nonconservative Forces

In the classical theory of elastic stability only potential forces (usually — the loads of the gravitational origin) were considered. With the development of technology the class of forces widened sufficiently. Many new problems were stated: stability of structures subjected to forces varying periodically in time (Belyaev [1]), stability of structures in the presence of follower forces (Nikolai [2]) etc. Survey of works dealing with the nonconservative problems of elastic stability is given in papers by Mettler [3], Evan-Iwanowski [4] and Herrmann [5] and in books by Bolotin [6, 7] published firstly in 1956 and 1961.