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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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Proceedings ArticleDOI
15 May 2006
TL;DR: In this paper, the authors extended the linearelastic buckling theory by coupling basic plasticity theory to provide a more comprehensive analysis of isotropic, cylindrical shells with compliant cores.
Abstract: Thin-walled, cylindrical structures are found extensively in both engineering and nature. Minimum weight design of such structures is essential in a variety of engineering applications, including space shuttle fuel tanks, aircraft fuselages, and offshore oil platforms. In nature, thin-walled cylindrical structures are often supported by a honeycombor foam-like cellular core, as for example, in plant stems, porcupine quills, or hedgehog spines. Previous studies have suggested that a compliant core increases the elastic buckling resistance of a cylindrical shell over that of a hollow cylinder of the same weight. We extend the linearelastic buckling theory by coupling basic plasticity theory to provide a more comprehensive analysis of isotropic, cylindrical shells with compliant cores. The minimum weight design of a thin-walled cylinder with a compliant core, of given radius and specified materials, subjected to a prescribed load in uniaxial compression or pure bending is examined. The analysis gives the values of the shell thickness, the core thickness, and the core density that minimize the weight of the structure for both loading scenarios. The weight optimization of the structure identifies the optimum ratio of the core modulus to the shell modulus. The design of natural, thin-walled structures with cellular cores is compared to the analytical optimal, and the deviation about the theoretical optimum is explored. The analysis also discusses the selection of materials in the design of the cylinders with compliant cores, identifying the most suitable material combinations. Finally, the challenges associated with achieving the optimal design in practice are discussed, and the potential for practical implementation is explored.

8 citations

Journal ArticleDOI
TL;DR: In this article, the authors present a procedure and computer program for the minimum weight design of circular, cylindrical, "T" frame reinforced, submersible shells where all metal thicknesses may be confined to specified gage thickness values.

8 citations

Proceedings ArticleDOI
17 Sep 1995
TL;DR: The authors are able to define minimum weight codewords of some alternant codes in terms of solutions to algebraic equations in the case of the classical Goppa codes.
Abstract: We are able to define minimum weight codewords of some alternant codes in terms of solutions to algebraic equations. Particular attention is given to the case of the classical Goppa codes. Grobner bases are used to solve the system of algebraic equations.

8 citations

Journal ArticleDOI
TL;DR: The necessary and sufficient conditions for defining the absolute minimum-weight design for two-dimensional bodies (shells, plates and disks) with a given load system are recalled and discussed in this article.
Abstract: The necessary and sufficient conditions for defining the absolute minimum-weight design for two-dimensional bodies (shells, plates and disks) with a given load system are recalled and discussed. A variational method for identifying the optimal solution through a numeric procedure of unrestricted minimisation is proposed. Some significant cases are considered as the general argument is expounded.

8 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202321
202239
202153
202051
201966
201858