Analytical investigation of the effect of material and geometric imperfections on buckling strength of spherical shells

Abstract

LIST OF FIGURES v LIST OF TABLES viii CHAPTER 1: 2.3 Experimental investigations 12 2.4 Shell analysis techniques 2.5 Previous numerical work on spherical shells 2.6 Modelling of material nonlinearities 2.7 Conclusions CHAPTER 3: BUCKLING ANALYSIS OF AXISYMMETRIC SHELLS

Buckling assessment of axially loaded cylindrical shells with random imperfections

“…3.2 except that it was provided an initial geometric imperfection. The imperfection has the shape of the first nonsymmetric eigen mode ( The effect of residual stresses (i.e., material imperfection) was introduced in the model by applying the stress strain relation [52,57] depicted in Fig. 3.3 in which the proportional limit equals to 0.55 of the yield stress.…”