Abstract
The curved plate has been extensively used as a structural member in many industrial fields, especially the shipbuilding industry. The present study investigated the ultimate strength and collapse behavior of the simply supported curved plate under a longitudinal compressive load. To do this, experimental apparatuses for evaluating the buckling collapse test of the curved plates was developed. Then, a series of buckling collapse experiments was carried out by considering the flank angle, slenderness ratio, and aspect ratio of plates. To examine the fundamental buckling and collapse behavior of the curved plate, elastoplastic large deflection analysis was performed using the commercial finite element analysis program. On the basis of both the experimental and FE analysis, the effects of the flank angle, slenderness ratio, and aspect ratio on the characteristics of the buckling and collapse behavior of the curved plates are discussed. Finally, the empirical design formula for predicting the ultimate strength of curved plates was derived. The proposed empirical formula is a good indicator for estimating the behavior of the curved plate.
Highlights
A cylindrically curved plate is an extensively used main member in many industrial fields such as shipbuilding, offshore, automotive, and aerospace industries
The ultimate strength characteristics, which depend on three main variables of a curved plate, were investigated
It is confirmed that a curved plate with the highest flank angle has the highest ultimate strength when compared with the curved plates having other flank angles
Summary
A cylindrically curved plate is an extensively used main member in many industrial fields such as shipbuilding, offshore, automotive, and aerospace industries. In the ship and offshore industries, approval from the classification society is mandatory for shipbuilding. For this purpose, the classification societies have provided design formulae to estimate the buckling strength of curved plates based on the results of commercial finite element analysis. There are differences in the design values between the results calculated by the rule given by the classification societies and those obtained from FE analysis. Kim et al [1] investigated the buckling and ultimate strengths of supported curved plates subjected to combined axial compression and lateral pressure by performing a series of elastic and elastoplastic large deflection analyses using commercial finite element program MSC PATRAN/NASTRAN. By comparing the results as per the classification rules and the results of FE analysis, it has been confirmed that the results of the critical buckling strength show significant differences for thinner plates; as a result, the improved design formulae are suggested
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