Abstract
Shape optimum design of elastic trusses under multiple loading conditions is considered. The optimization procedure includes selection of topology, geometry and sectional properties. The weight of a truss is minimized subject to nodal equilibrium and permissible stress constraints, and constraints to ensure a unique stress-free length of each member. The approach presented here helps to reduce the nonlinearity of constraints. The problems of realizability and overstress in the final design, as present in some of the previous works, are easily met without any conceptual difficulty.
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