Definition of Buckling Mode Classes General

Generalized Beam Theory (GBT) is the only known method which is able to produce and isolate solutions for all the buckling modes: global, distortional and local. Further, modes identified via the GBT methodology are generally in accordance with commonly used definitions. Thus, our aim is to identify the critical assumptions in the GBT formulation that lead to the method’s ability to isolate the modes. However, the goal is not to mimic the GBT formulation, but rather to construct the underlying GBT ideas as a series of distinct mechanical assumptions. These mechanical assumptions can then be enforced through constraints in more general methods such as FSM or FEM.