Application of a new proof of plate capacity under combined in-plane loads

A new proof of plate capacity under combined in-plane loads has been developed based on an improved understanding of collapse gleaned from an extensive series of non-linear buckling analyses using the finite element method and covering the full range of plating configurations and load combinations relevant for the shipbuilding industry. Compared to existing proofs, the new proof incorporates a more physically-based approach towards tensile stress effects on plate capacity and better captures the influences of both plate slenderness and aspect ratio under compressive biaxial stresses. Moreover, the new proof can be solved without the need for iterations and may be used directly with stresses obtained from finite element analyses, thereby eliminating the need for a correction of stresses due to Poisson effects. However, this new proof is based on a number of simplifications pertaining to boundary conditions, applied loads and initial imperfections. Because any or all of these assumptions may be violated in practice, the purpose of this paper is to demonstrate that the new proof remains valid in case of other boundary conditions, additional load components and initial imperfections which are more realistic.

Schlagworte

Buckling

Combined loads

Inplane loads

Plates

Ships

Ultimate strength

Options

Application of a new proof of plate capacity under combined in-plane loads