Spherical Shell Material And Strength Study Of LNG Carrier

This paper describes the strength of material and the factors affect it. Special analysis and study have been focused on the cold brittleness of metallic material and its affecting factors. Major conclusions have been drawn. As regards to the spheric thin shell structure under external hydro static pressure,basing on flat-plate theory and by using basic Von Karman equations for large deflection,the equilibrium problem of axisymmetric bending of the spheric shell under uniform external pressure is simplified to an equilibrium problem of bending of elastic basic flat-plate and further converted into an equilibrium problem of beam on elastic fundation taking into consideration of the deformation characteristics.