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Transverse shear stiffness of corrugated core steel sandwich panels with dual weld lines
AbstractAdvances in the field of laser welding have recently enabled the commercial production of all-steel sandwich panels with a continuous and robust connection between the core and the face plates, even for plate thicknesses over 10mm. This allows for the application of the high-performance steel sandwich panel in several fields, such as civil structures. In this paper, an analytical model is presented to determine the transverse shear stiffness of corrugated core steel sandwich panels with dual weld lines. The derivation is based on the direct stiffness method (DSM). At the welded connection between the core and the faces, a rotational spring is included in the structural model, as the idealised rigid connection is unable to properly capture the mechanical interaction between the constituent plates. Both bending and shear deformation in the cross-sectional constituent members is taken into account. The model is shown to have high precision in terms of predicting the transverse shear stiffness when compared with numerical analyses. Furthermore, high precision is also shown when it comes to predicting normal stresses in the constituent members of the panel with respect to shear action. In a case study included in this paper, the impact of having two weld lines compared with a single weld was studied, together with the effect of the distance between the welds. The results show a large impact with respect to shear stiffness and stresses in the constituent plates. This paper focuses on laser-welded corrugated core steel sandwich panels, but the presented model can also be used for analyses of general continuous core shapes and other isotropic materials.
HighlightsTransverse shear stiffness of corrugated sandwich panel with dual welds is derived.Rotational stiffness of the weld connections are considered as rotational springs.Shear deformation of the constituent members of the cross section is included.Several finite element analyses confirms the accuracy of the derived model.Impact of two weld lines in comparison with a single weld line is studied.
Transverse shear stiffness of corrugated core steel sandwich panels with dual weld lines
AbstractAdvances in the field of laser welding have recently enabled the commercial production of all-steel sandwich panels with a continuous and robust connection between the core and the face plates, even for plate thicknesses over 10mm. This allows for the application of the high-performance steel sandwich panel in several fields, such as civil structures. In this paper, an analytical model is presented to determine the transverse shear stiffness of corrugated core steel sandwich panels with dual weld lines. The derivation is based on the direct stiffness method (DSM). At the welded connection between the core and the faces, a rotational spring is included in the structural model, as the idealised rigid connection is unable to properly capture the mechanical interaction between the constituent plates. Both bending and shear deformation in the cross-sectional constituent members is taken into account. The model is shown to have high precision in terms of predicting the transverse shear stiffness when compared with numerical analyses. Furthermore, high precision is also shown when it comes to predicting normal stresses in the constituent members of the panel with respect to shear action. In a case study included in this paper, the impact of having two weld lines compared with a single weld was studied, together with the effect of the distance between the welds. The results show a large impact with respect to shear stiffness and stresses in the constituent plates. This paper focuses on laser-welded corrugated core steel sandwich panels, but the presented model can also be used for analyses of general continuous core shapes and other isotropic materials.
HighlightsTransverse shear stiffness of corrugated sandwich panel with dual welds is derived.Rotational stiffness of the weld connections are considered as rotational springs.Shear deformation of the constituent members of the cross section is included.Several finite element analyses confirms the accuracy of the derived model.Impact of two weld lines in comparison with a single weld line is studied.
Transverse shear stiffness of corrugated core steel sandwich panels with dual weld lines
Nilsson, Peter (author) / Al-Emrani, Mohammad (author) / Atashipour, Seyed Rasoul (author)
Thin-Walled Structures ; 117 ; 98-112
2017-04-06
15 pages
Article (Journal)
Electronic Resource
English
Transverse shear stiffness of corrugated core steel sandwich panels with dual weld lines
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