Convergence and Stability of Nonlinear Finite Element Equations

Abstract

For k= 1, i.e., for the case of isotropic core, the critical loads TV* and N*L, given by Eqs. (16) and (17) reduce to those obtained by Fulton. In order to show the effect of orthotropic core upon the critical loads, the following numerical values for shell property and dimensions are used: El =E2 =E, tj = t2 = t=0.05 in., ju = 0.3, E/Gxz = 2xW, 0 = 100 in., # = 200 in., C = 0.5 in. The critical loads are expressed in the following form as