J. Enrique Herencia

article

Structural optimization of composite structures with limited number of element properties

J. Enrique Herencia, Raphael T. Haftka, Vladimir Balabanov

Structural and Multidisciplinary Optimization > 2013 > 47 > 2 > 233-245

This paper investigates the weight penalty of a composite structure under strength and buckling constraints when cross-sections are designed from a limited number of laminates. The problem is investigated for the well known ten-bar truss structure. Results show that decreasing the number of cross-sections from nine to four has a small impact on the weight of the structure of approximately 5.4%. Furthermore,...

article

Analysis and benchmarking of meta-heuristic techniques for lay-up optimization

Mark W. Bloomfield, J. Enrique Herencia, Paul M. Weaver

Computers and Structures > 2010 > 88 > 5-6 > 272-282

The analysis and benchmarking of three meta-heuristic algorithms to determine laminate stacking sequences is presented. The benchmarking is undertaken for a simply supported composite laminate subject to strength and buckling constraints. A genetic algorithm, ant colony and particle swarm optimization are considered. It is shown that for inherently discrete sets of ply orientations, ant colony optimization...

article

Structural optimization with limited number of element properties

J. Enrique Herencia, Raphael T. Haftka

Structural and Multidisciplinary Optimization > 2010 > 41 > 5 > 817-820

This note investigates the weight lost of a structure that presents a limited number of cross-sections for its members. A combined genetic algorithm-gradient approach is used to obtain the minimum weight structure for various numbers of cross-sections. The problem is investigated for the well known ten-bar truss structure. Results show that decreasing the number of cross-sections from nine to four...

article

Enhanced two-level optimization of anisotropic laminated composite plates with strength and buckling constraints

Mark W. Bloomfield, J. Enrique Herencia, Paul M. Weaver

Thin-Walled Structures > 2009 > 47 > 11 > 1161-1167

In laminated composite design, ply orientations are often restricted to 0°, 90°, ±45°. However, studies have shown that an expanded set of ply orientations may lead to more efficient structures for specific problems. In particular, 60° plies are optimum for shear in buckling for long anisotropic composite laminated plates. A two-level optimization approach, using 0°, 90°, ±45°, ±30°, ±60° plies, is...

article

Initial sizing optimisation of anisotropic composite panels with T-shaped stiffeners

J. Enrique Herencia, Paul M. Weaver, Michael I. Friswell

Thin-Walled Structures > 2008 > 46 > 4 > 399-412

This paper provides an approach to perform initial sizing optimisation of anisotropic composite panels with T-shaped stiffeners. The method divides the optimisation problem into two steps. At the first step, composite optimisation is performed using mathematical programming, where the skin and the stiffeners are modelled using lamination parameters accounting for their anisotropy. Skin and stiffener...

article

Optimization of anisotropic composite panels with T-shaped stiffeners including transverse shear effects and out-of-plane loading

J. Enrique Herencia, Paul M. Weaver, Michael I. Friswell

Structural and Multidisciplinary Optimization > 2008 > 37 > 2 > 165-184

A two-step method to optimize anisotropic composite panels with T-shaped stiffeners, including a new formulation of the transverse shear properties and an approximation of the ply contiguity (blocking) constraints as functions of the lamination parameters is provided. At the first step, a representative element of the stiffened panel (superstiffener) is optimized using mathematical programming and...

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Search results for: J. Enrique Herencia

Structural optimization of composite structures with limited number of element properties

Analysis and benchmarking of meta-heuristic techniques for lay-up optimization

Structural optimization with limited number of element properties

Enhanced two-level optimization of anisotropic laminated composite plates with strength and buckling constraints

Initial sizing optimisation of anisotropic composite panels with T-shaped stiffeners

Optimization of anisotropic composite panels with T-shaped stiffeners including transverse shear effects and out-of-plane loading

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INFONA - science communication portal

Search results for: J. Enrique Herencia

Structural optimization of composite structures with limited number of element properties

Analysis and benchmarking of meta-heuristic techniques for lay-up optimization

Structural optimization with limited number of element properties

Enhanced two-level optimization of anisotropic laminated composite plates with strength and buckling constraints

Initial sizing optimisation of anisotropic composite panels with T-shaped stiffeners

Optimization of anisotropic composite panels with T-shaped stiffeners including transverse shear effects and out-of-plane loading

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