Problem 12.8Given: In the figure, columns AB and CD have pinned ends, are made of an aluminum alloy (E=72 GPa),and have equal rectangular cross sections of 20 mm by 30 mm. Determine the magnitude of P that willfirst cause one of the columns to buckle. Assume elastic conditions.Solution:E72 GPa⋅:=Imin30 mm⋅20 mm⋅()3⋅122104×mm4=:=Sum moments about upper hinge1500 P⋅500 PAB⋅−0=PAB
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Aluminium, Column, Tensile strength, Causality, Aluminium alloy, 30 mm caliber