Ultimate Strength Characteristics of a Ship's Deck Stiffened Plate Structure in the Presence of Camber Parabolic Curvature

Curvature of ship deck plate

Extent of the models

Transverse and Longitudinal edges of the models

Finite element discretization of curved stiffened plate and incorporating parameters. (a) Initial deflection in the plate. (b) Initial deflection in the stiffener. (c) Angular distortion of the stiffener.

Effect of transverse frames on the average stress-average strain relationship of the curved stiffened plate (plate: L = a = 2631.6 mm, b = 3800 mm, c = 76 mm, t = 11 mm; with five longitudinal stiffeners: 210.95 × 10 mm; and with two transverse frames: 421.9 × 10 mm)

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 0.43,αs = 0.52,βs = 20.81,d/L = 0.07

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 0.47,αs = 0.48,βs = 19.05,d/L = 0.08

Deflection mode at the ultimate strength level for the model ID1

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 0.82,αs = 0.27,βs = 10.86,d/L = 0.14

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 1.64,αs = 0.14,βs = 5.43,d/L = 0.28

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 1.27,αs = 0.19,βs = 7.69,d/L = 0.3

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 2.29,αs = 0.16,βs = 9.54,d/L = 0.3

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 2.72,αs = 0.23,βs = 5.32,d/L = 0.3

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 1.27,αs = 0.32,βs = 31.58,d/L = 0.3

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 2.29,αs = 0.27,βs = 47.46,d/L = 0.3

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 1.06,αs = 0.90,βs = 296.55,d/L = 0.3

Comparison of average stress-average strain relationships for curved stiffened plate models with βP = 2.54,αs = 0.95,βs = 960.79,d/L = 0.3

Idealized distribution of welding residual stresses

General steps in order to produce welding residual stresses inside the analyzed models

The effect of welding residual stresses on the average stress-average strain relationship for the curved stiffened plate model with c/b = 0.05,d/L = 0.05,βP = 0.4,αs = 0.55,βs = 23.97,σY= 235 MPa, σt= 235 MPa, σc= 192.35 MPa

The effect of welding residual stresses on the average stress-average strain relationship for the curved stiffened plate model with c/b = 0.1,d/L = 0.3,βP = 2.29,αs = 0.27,βs = 47.45,σY= 235 MPa, σt= 235 MPa, σc= 56.7 MPa

The effect of welding residual stresses on the average stress-average strain relationship for the curved stiffened plate model with c/b = 0.15,d/L = 0.24,βP = 1.64,αs = 0.27,βs = 41.6,σY= 235 MPa, σt= 235 MPa, σc= 36.42 MPa.

The effect of different types of curvature on the average stress-average strain relationship for the curved stiffened plate model with d/L = 0.3,βP = 2.54,αs = 0.95,βs = 960.79