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Showing papers in "Computers & Structures in 1994"


Journal ArticleDOI
TL;DR: In this article, the adjoint variable is used for sensitivity analysis and the linear programming method is used to obtain the optimal topology, which can handle various problems, for example, multiple objective functions and multiple design criteria.

271 citations


Journal ArticleDOI
TL;DR: The present paper suggests several changes to the basic genetic algorithm developed previously, and demonstrates reduced computational cost and increased reliability of the algorithm due to these changes.

259 citations


Journal ArticleDOI
TL;DR: In this article, a path-following technique is presented for the numerical solution of a class of elastic structural problems, which is based on applying a perturbation technique in a stepwise manner.

234 citations


Journal ArticleDOI
TL;DR: In this article, the problem of identifying critical loads is formulated mathematically as an optimization problem in itself (called anti-optimization), so that the design problem is formulated as a two-level optimization.

233 citations


Journal ArticleDOI
TL;DR: In this article, an application of dual boundary element method to the analysis of three-dimensional mixed-mode crack growth is presented, where the crack growth processes are simulated numerically with an incremental crack-extension analysis based on the minimum strain energy density criterion and a fatigue crack growth law.

175 citations


Journal ArticleDOI
TL;DR: In this article, a new scheme for the generation of a quadrilateral element mesh is presented, which makes use of the fact that a triangular element mesh bounded by an even number of line segments can always be converted into quadrilaterals.

136 citations


Journal ArticleDOI
TL;DR: In this paper, the response of composite plates constructed of graphite/epoxy laminae with an attached piezoelectric polyvinylidene fluoride layer subjected to mechanical, thermal and electric field loading is considered for various length-to-depth and aspect ratios.

129 citations


Journal ArticleDOI
TL;DR: In this paper, a simple kinematic model of a column was constructed with four free parameters and closed-form solutions were derived for the moment-rotation characteristics of square columns in the post-failure range and stress profiles in the most general case of a floating neutral axis.

124 citations


Journal ArticleDOI
TL;DR: In this article, an adaptive nonlinear approximation of performance function is proposed, in which the nonlinearity of the function is controlled by the feedback information from the previous iteration, and the proposed analysis procedure includes identifying the most probable point of a limit state, establishing an approximate nonlinear performance function by using intervening variables and applying the HL-RF or the modified HL RF method.

118 citations


Journal ArticleDOI
TL;DR: In this article, a computational scheme for the integration of rate-dependent constitutive relations for the high strain-rate finite inelastic deformation and failure of metallic materials is introduced.

117 citations


Journal ArticleDOI
TL;DR: In this article, the pseudo-excitation or fast CQC method for a single excitation problem is extended to deal with general MIMO (multi-input-multi-output) problems in which the excitations can be fully or partially coherent.

Journal ArticleDOI
TL;DR: In this article, the thermal buckling of laminated composite plates is analyzed using the finite element method based on the Reissner-Mindlin first order shear deformation theory.

Journal ArticleDOI
TL;DR: In this article, a geometrical interpretation of the Risks-Wempner method and a new algorithm to choose the appropriate root of a nonlinear constraint equation are presented.

Journal ArticleDOI
TL;DR: In this paper, the performance of a weighted global iteration for the extended Kaiman filter was evaluated in a simulated earthquake input-response pair and it was found that the weighted global iterative procedure converged to give reasonable estimates provided the ground shaking intensity was high enough to trigger significant yielding.

Journal ArticleDOI
TL;DR: In this article, a finite strip method for the elastic analysis of anisotropic laminated composite plates is developed according to higher-order shear deformation theory, which accounts for the parabolic distribution of the transverse shear strains through the thickness of the plate.


Journal ArticleDOI
TL;DR: In this paper, a two-dimensional eight-noded isoparametric finite element is derived for modeling the distributed coupled electromechanical behavior using higher order displacement theory, and the results obtained by the present finite element method for a given distributed mechanical load and with or without describing the electric potential on the surface of the actuator are compared with the exact solution.

Journal ArticleDOI
TL;DR: In this paper, the authors construct a substructure interface impedance operator and present a spectral analysis that demonstrates that the method of Craig and Bampton (CB) is the most natural component mode synthesis method.

Journal ArticleDOI
TL;DR: In this paper, a probabilistic optimal design methodology for complex structures modelled with finite element methods is presented, where the main emphasis is on developing tools suitable for optimization and an advanced second-moment method is employed to evaluate the failure probability of the performance function.

Journal ArticleDOI
TL;DR: In this paper, a 24 degree of freedom quadrilateral shell element is developed and a status report on the formulation method is provided by pointing out what works and what does not.

Journal ArticleDOI
TL;DR: A finite element method has been developed for deformation and stress analysis of domains that have been discretized by Dirichlet tessellation, and the first can be easily applicable to the analysis of structured materials that are modeled by a set of isolated material points in a continuum.

Journal ArticleDOI
TL;DR: In this paper, the elasto-plastic stress analysis of orthotropic rotating discs with holes has been carried out by the finite element method (FEM), where an isoparametric rectangular element with nine nodes has been chosen and the Lagrange polynomial has been used as interpolation function.

Journal ArticleDOI
TL;DR: In this paper, a simple solution strategy to find the shape and topology of a general structure that maximize or minimize the natural frequency is presented, where a small part of the material is removed from the structure at the end of each finite element analysis.

Journal ArticleDOI
C.K. Gim1
TL;DR: In this article, a plane finite element is developed based on a lamination theory which includes the effect of transverse shear deformation, and the virtual crack closure technique is modified and implemented into the code so that the strain energy release rate could be computed using the plate elements.

Journal ArticleDOI
TL;DR: In this article, a refined higher-order shear deformation theory has been developed for large amplitude, in the sense of von Karman, free vibration analysis of fibre reinforced cross-ply composite and sandwich laminates by assuming cubic variations of in-plane displacement components and a constant transverse displacement component through the thickness of the laminate.

Journal ArticleDOI
TL;DR: In this article, a critical review of the merits and disadvantages of previous studies, the primary physical approaches for improving the efficiency of the modified adaptive dynamic relaxation (maDR) method are discussed.

Journal ArticleDOI
TL;DR: In this article, the effects of confinement and venting are considered in the evaluation of dynamic loads of a contact explosion and the associated effects on a concrete target are determined as functions of charge weight, concrete strength and member thickness.

Journal ArticleDOI
TL;DR: In this article, a set of higher-order theories with C 0 isoparameteric finite elements and exact three-dimensional equilibrium equations are used for the accurate evaluation of transverse stresses in general composite and sandwich laminates.

Journal ArticleDOI
TL;DR: In this paper, the generalized Vlasov's thin-walled beam theory was combined with the finite element technique to develop a new curved thinwalled multicell box girder finite element which can model extension, flexure, torsion, and distortion, distortional warping and shear lag effects.

Journal ArticleDOI
TL;DR: In this article, a method which sets steel cable-stayed bridge design in a multi-objective optimization context with goals of minimum cost and stress is described, where cable anchor positions on the main girder and pylon and the cross-sectional sizes of the structural members are dealt with as design variables.