Journal of Applied Mechanics- ^-i*!-!*™^ Nonlinear Bending and Collapse of Long, Thin, Open Section Beams and Corrugated

F. A. Emmerling.2 The basic assumptions in this work raise some doubts. In particular, the longitudinal stress is assumed "proportional to the vertical distance from the neutral axis" and the bending moment is found "from the classical beam-equilibrium equation Mz = EZIK " where the area moment of inertia lis calculated for deformed section. But redistribution of longitudinal stress in the cross section constitutes the main effect of the initial curvature. This has been known since the linear analysis of Th. V. Karman [1]. (But the work is clearly intended to encompass initially curved beams.) This fact has been confirmed in the nonlinear theory of tubes and open-section beams (initially straight or curved). Regrettably, most of the relevant literature has been overlooked. The review paper by E. L. Axelrad mentioned by the author refers to work [23, 35, 37, 39] treating the problems in question. There are also more recent publications [2]