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Imperfection sensitivity of slender/stocky metal plates
Abstract Buckling and postbuckling behavior of metal plates is governed by their slenderness parameter. Using nonlinear finite element simulations, unstiffened mild carbon steel, stainless steel and aluminum plates under the action of axial compression are first classified into slender, moderate and stocky plates. Then the effects of initial imperfection amplitude on each plate type and material is studied via sensitivity analyses. The results show that the transition from slender to stocky plates, regardless of material type, occurs at the slenderness parameter of 2. Empirical equations for evaluating the buckling and postbuckling capacities of imperfect plates are drawn out. It is observed that the increase of imperfection amplitude decreases the buckling load of slender plates, but their postbuckling reserves and ultimate capacities are unaffected. In contrast, the ultimate strength of stocky plates is highly affected by initial imperfections.
Highlights Imperfection sensitivity of slender and stocky plates is addressed. Metal plates in compression are classified into slender, moderate and stocky plates. The transition from slender to stocky plates occurs at the slenderness parameter of 2. Stocky plates have equal buckling and ultimate loads and possess some post-yield capacity which increases with the plate thickness. Empirical equations for evaluating buckling and postbuckling capacities of imperfect plates are drawn.
Imperfection sensitivity of slender/stocky metal plates
Abstract Buckling and postbuckling behavior of metal plates is governed by their slenderness parameter. Using nonlinear finite element simulations, unstiffened mild carbon steel, stainless steel and aluminum plates under the action of axial compression are first classified into slender, moderate and stocky plates. Then the effects of initial imperfection amplitude on each plate type and material is studied via sensitivity analyses. The results show that the transition from slender to stocky plates, regardless of material type, occurs at the slenderness parameter of 2. Empirical equations for evaluating the buckling and postbuckling capacities of imperfect plates are drawn out. It is observed that the increase of imperfection amplitude decreases the buckling load of slender plates, but their postbuckling reserves and ultimate capacities are unaffected. In contrast, the ultimate strength of stocky plates is highly affected by initial imperfections.
Highlights Imperfection sensitivity of slender and stocky plates is addressed. Metal plates in compression are classified into slender, moderate and stocky plates. The transition from slender to stocky plates occurs at the slenderness parameter of 2. Stocky plates have equal buckling and ultimate loads and possess some post-yield capacity which increases with the plate thickness. Empirical equations for evaluating buckling and postbuckling capacities of imperfect plates are drawn.
Imperfection sensitivity of slender/stocky metal plates
Amani, Mozhdeh (author) / Alinia, M.M. (author) / Fadakar, M. (author)
Thin-Walled Structures ; 73 ; 207-215
2013-08-16
9 pages
Article (Journal)
Electronic Resource
English
Buckling , Postbuckling , Plates , Initial imperfection , Slender , Stocky
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