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Minimum weight
About: Minimum weight is a research topic. Over the lifetime, 2002 publications have been published within this topic receiving 28244 citations.
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6 citations
TL;DR: In this paper, a new philosophy for optimisation of composite structures in relation to lightweight design is presented based on Michell optimum lay-out theory, which uses orthogonal mesh structures disposed in the direction of principal stress trajectories, associated with an absolutely uniform distribution of stress in the fibres.
Abstract: This work presents a new philosophy for optimisation of composite structures in relation to lightweight design. It is based on Michell optimum lay-out theory, which uses orthogonal mesh structures disposed in the direction of principal stress trajectories, associated with an absolutely uniform distribution of stress in the fibres. The fibres in the composite component micro structure are disposed orthogonally like the minimum weight Michell structures, with voids filled with resin. This is the same mechanical principle which governs the optimisation of natural composites such as bones, horn, trees etc. Based on this natural rule, a procedure to find the optimum topology for the design of optimum composite mechanical components has been developed. A CAD-CAE software system based on finite element analysis using ABAQUS produces interactively on a screen the structure of optimum topology where the optimum fibre arrangement will be made.
6 citations
TL;DR: An algorithm for computing the perturbability function of a matroid is presented that runs in strongly polynomial time for matroids in which independence can be tested in strongly Poole's inequality.
Abstract: of a matroid measures the maximum increase in the weight of its minimum weight bases that can be produced by increases of a given total cost on the weights of its elements. We present an algorithm for computing this function that runs in strongly polynomial time for matroids in which independence can be tested in strongly polynomial time. Furthermore, for the case of transversal matroids we are able to take advantage of their special structure to design a faster algorithm for computing the perturbability function.
6 citations
TL;DR: In this paper, a multi-objective Pareto archived simulated annealing algorithm (PASA) was proposed to obtain simultaneously the maximum buckling and the minimum weight concerning with proposed constraints.
Abstract: In this study for the first time, weight and critical buckling load in two kinds of functionally graded (FG) circular plates, namely, aluminum–alumina of (Al/Al2 O3 ) and aluminum–zirconia (Al/ZnO2 ), are optimized using multi-objective Pareto archived simulated annealing algorithm (PASA). Material properties are assumed to vary with the power law in terms of the volume fractions of the constituent in two forms of symmetric and asymmetric with respect to the middle surface. The plate is subjected to uniform radial load and is considered for two boundary conditions, namely, simply supported and clamped edges. Aim at obtaining the Pareto archive is to achieve simultaneously the maximum buckling and the minimum weight concerning with proposed constraints. The parameters include the radius, thickness and volume fraction that the certain range is intended individually. The constraints are presented in form of the ratio of thickness to radius in category of the thin plates as well as the critical buckling stress being in the elastic range. Proposed simulated annealing algorithm is coded in MATLAB to obtain optimal non-dominated solution.
6 citations
19 May 1986
TL;DR: In this article, the problem of minimizing the weight of a structure subject to coupled bending and torsional vibrations and frequency constraint has been studied, and the results have also been compared with those of the associated primal problem.
Abstract: The problem of minimizing the weight of a structure subject to coupled bending and torsional vibrations and frequency constraint has been studied in this paper. Stationary values of an appropriate objective function with both linear and nonlinear contraints have been discussed. Optimal designs of thin walled open section, with and without coupling effects have been compared. The results have also been compared with those of the associated primal problem.
6 citations