Abstract
The objective of the present paper is to develop nonlinear finite element method models for predicting the weld-induced initial deflection and residual stress of plating in steel stiffened-plate structures. For this purpose, three-dimensional thermo-elastic-plastic finite element method computations are performed with varying plate thickness and weld bead length (leg length) in welded plate panels, the latter being associated with weld heat input. The finite element models are verified by a comparison with experimental database which was obtained by the authors in separate studies with full scale measurements. It is concluded that the nonlinear finite element method models developed in the present paper are very accurate in terms of predicting the weld-induced initial imperfections of steel stiffened plate structures. Details of the numerical computations together with test database are documented.
Highlights
The objective of the present paper is to develop nonlinear finite element method models for predicting the weld-induced initial deflection and residual stress of plating in steel stiffened-plate structures
Three-dimensional thermo-elastic-plastic finite element method computations are performed with varying plate thickness and weld bead length in welded plate panels, the latter being associated with weld heat input
It is concluded that the nonlinear finite element method models developed in the present paper are very accurate in terms of predicting the weld-induced initial imperfections of steel stiffened plate structures
Summary
Ships and offshore structures are fabricated by welding and weld-induced. It is required to predict the weld-induced initial imperfections in magnitude and pattern in association with structural design and construction. A large number of studies are found in the literature. In recent years, these studies are associated with weld-induced initial distortions [1] [2] [3] [4] [5] and welding-induced residual stresses [6] [7] [8] [9] [10].
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