This work reviews the ultimate compressive strength of aluminium plates and stiffened panels.The effect of boundary condition,initial imperfection,welding-induced residual stress and heat-affected zone are discussed.A...This work reviews the ultimate compressive strength of aluminium plates and stiffened panels.The effect of boundary condition,initial imperfection,welding-induced residual stress and heat-affected zone are discussed.As the effect of manufacturing technology lacks in the literature,this effect is analysed employing the finite element method,considering the technology of welding and integrated extrusion.The numerical analyses have shown that the ultimate strength of the integrated extruded stiffened panel is relatively higher than the one of the traditional welded panel.展开更多
In order to achieve a better understanding of failure behavior of cruciform specimen under different biaxial loading conditions,a three-dimensional finite element model is established with solid and interface elements...In order to achieve a better understanding of failure behavior of cruciform specimen under different biaxial loading conditions,a three-dimensional finite element model is established with solid and interface elements.Maximum stress criterion,two Hashin-type criteria and the new proposed criteria are used to predict the strength of plain woven textile composites when biaxial loading ratio equals 1.Compared with experimental data,only the new proposed criteria can reach reasonable results.The applicability of the new proposed criteria is also verified by predicting the tensile and compressive strength of cruciform specimen under different biaxial loading ratios.Moreover,the introduction of interface element makes it more intuitive to recognize delamination failure.The shape of the predicted delamination failure region in the interface layer is similar to that of the failure region in neighboring entity layers,but the area of delamination failure region is a little larger.展开更多
基金This work is supported by the“National Natural Science Foundation of China(Grant No.51709212)”This work also contributes to the Strategic Research Plan of the Centre for Marine Technology and Ocean Engineering,which is financed by the Portuguese Foundation for Science and Technology(Fundação para a Ciência e Tecnologia-FCT)under contract UIDB/UIDP/00134/2020.
文摘This work reviews the ultimate compressive strength of aluminium plates and stiffened panels.The effect of boundary condition,initial imperfection,welding-induced residual stress and heat-affected zone are discussed.As the effect of manufacturing technology lacks in the literature,this effect is analysed employing the finite element method,considering the technology of welding and integrated extrusion.The numerical analyses have shown that the ultimate strength of the integrated extruded stiffened panel is relatively higher than the one of the traditional welded panel.
基金supported by the National Natural Science Foundation of China(No.51205190)the Jiangsu Province Key Laboratory of Aerospace Power System(No.NJ20140019)
文摘In order to achieve a better understanding of failure behavior of cruciform specimen under different biaxial loading conditions,a three-dimensional finite element model is established with solid and interface elements.Maximum stress criterion,two Hashin-type criteria and the new proposed criteria are used to predict the strength of plain woven textile composites when biaxial loading ratio equals 1.Compared with experimental data,only the new proposed criteria can reach reasonable results.The applicability of the new proposed criteria is also verified by predicting the tensile and compressive strength of cruciform specimen under different biaxial loading ratios.Moreover,the introduction of interface element makes it more intuitive to recognize delamination failure.The shape of the predicted delamination failure region in the interface layer is similar to that of the failure region in neighboring entity layers,but the area of delamination failure region is a little larger.
