Showing papers in "Computers & Structures in 1998"

TL;DR: In this article, the main concepts and derivation of the equations for computation of effective constitutive parameters of complex materials with a periodic micro structure are discussed. And the homogenization approach, with an emphasis on the optimality criteria method, is discussed.

TL;DR: The second part of a three-part review of homogenization and topology optimization can be found in this article, where the authors described different material models and the analytical solution of the homogenisation equations for the so called rank laminate composites is presented.

TL;DR: In this paper, the effect of low density filler material, such as aluminum honeycomb or foam, on the axial crushing resistance of a square box column under quasi-static loading conditions is studied.

TL;DR: A genetic algorithm is applied to the problem of damage detection using vibration data to identify the position of one or more damage sites in a structure and to estimate the extent of the damage at these sites.

TL;DR: In this paper, the mathematical model for the topological structural optimization is constructed and derivation of related optimality criteria is explained, a modified resizing scheme is suggested and illustrative examples are provided.

TL;DR: In this paper, the authors present fundamental considerations regarding the finite element analysis of shell structures and propose appropriate shell analysis test cases for numerical evaluations, which are applicable to both categories of shell behaviour and the rate of convergence in either case should be optimal.

TL;DR: In this paper, both a legitimate methodology suitable to the analysis of extended end plate moment resisting connections and proper three-dimensional finite element models are established, for non-preloaded and preloaded bolted tee stubs which are provided as benchmarks.

TL;DR: In this paper, the authors developed an exact dynamic stiffness matrix of a composite beam with the effects of axial force, shear deformation and rotatory inertia taken into account, for an axially loaded composite Timoshenko beam.

TL;DR: In this paper, the authors compare two possible representations of a certain class of fourth-order isotropic tensor functions by a symmetric second-order tensor argument and show that the second representation needs less computational time than the first one.

TL;DR: In this article, a novel algorithm to choose the correct root for the cylindrical arc-length method is suggested, which is robust and can handle very sharp snap-backs.

TL;DR: In this paper, the structural response of a damped single-degree-of-freedom (SDF) structural system with one-sided pounding during an earthquake is examined and the effects of separation distance and inelastic structural behavior on the magnitude of the pounding force are examined.

TL;DR: In this paper, an approach to the identification of the loads acting on aircraft wings, which uses an artificial neural network to model the load-strain relationship in structural analysis, is presented.

TL;DR: In this paper, the vibrational characteristics of a cracked Timoshenko beam are analyzed using the finite element method and component mode synthesis, where the beam is divided into two components related by a flexibility matrix which incorporates the interaction forces.

TL;DR: In this article, asphalt mixtures are described as visco-elastoplastic materials for which the responses of the mixtures to the loads are categorized into three groups as elasticity, viscoelasticity and viscoplasticity, depending on whether they are time dependent and recoverable during the unloading period.

TL;DR: In this article, the authors presented vibration control of bridges under moving loads using a tuned mass damper (TMD), a kind of passive type control device that has permanent service time, and only requires easy management and maintenance efforts and no external power supplying sources.

TL;DR: In this paper, the authors examined the relevance of computer integrated manufacturing (CIM) and lean production techniques to the construction industry and showed that construction can, and should, be viewed as a manufacturing process.

TL;DR: In this article, the finite element method is used to find the regions of dynamic stability of beams and frames, and a suitable numerical procedure allows diagrams to be obtained where these regions are located as functions of the dynamic force applied and vibration frequency of the structures analyzed.

TL;DR: In this article, the effect of shear deformation on deflection and shear deformations together with rotatory inertia on natural and cross over frequencies of curved beams are obtained using a simple cubic linear beam element having 4 degrees of freedom per node viz u, w, θ and γ.

TL;DR: In this paper, a functional and a plate element capable of modeling the Kirchhoff type orthotropic plate resting on Winkler/Pasternak (isotropic/orthotropic) elastic foundation are given and numerical results of a free vibration analysis is performed.

TL;DR: In this article, a simply supported symmetric cross-ply (0°/90°/0°) graphite-epoxy composite plate covered with piezoelectric material polyvinylidene fluoride (PVDF) is presented.

TL;DR: In this article, an algorithm for computing the anisotropic elastic Green's function and its derivatives is presented, based upon the calculus of residues, the main requirement being the computation of the roots of a sixth degree polynomial.

TL;DR: In this paper, the extended Kantorovich method proposed by Kerr is further extended to the eigenvalue problem of elastic stability of various rectangular thin plates, and a large number of numerical experiments are carried out and the computed buckling loads are either exact or more accurate than the best known results in the literature.

TL;DR: In this article, a new approach to optimal design and detailing of reinforced concrete biaxial columns using genetic algorithms (GAs) was introduced, where GAs conduct a global search to identify the optimal reinforcement bar sizes and bar detailing arrangements, which satisfy maximum bending capacity about both axes of the column section and minimise the area of the reinforcements.

TL;DR: Based on the first order shear deformation theory (FSDT) a method is developed for calculating the transverse normal stress (in thickness direction) in layered composite plate structures as discussed by the authors.

TL;DR: In this paper, the analytical solutions for the free vibration of the rotating composite cylindrical shells with axial stiffeners (stringers) and circumferential stiffener (rings), that is, orthogonal stiffeners, are presented using the energy method.

TL;DR: In this paper, the authors show that effective and reliable computer codes can be obtained by a suitable finite element implementation of the Koiter's perturbation method, but careful attention has to be paid to all the implementation details in order to avoid kinematical inconsitencies that can strongly affect the results.

TL;DR: The single-objective optimization of structures, whose parameters are assigned as fuzzy numbers or fuzzy relations, is presented in this paper as a particular case of the random set theory and evidence theory approach to uncertainty.

TL;DR: In this paper, a numerical investigation for the stresses and displacements of a two-dimensional elastic problem with mixed boundary conditions is reported, which is based on the analysis of stresses at the fixed end of deep cantilever beams, subjected to uniformly distributed shear at the free end.

TL;DR: In this paper, the transient temperatures that develop during the welding of a steel plate are analyzed using a recently developed finite element computer program, which allows for temperature variation throughout the thickness of a welded plate.

TL;DR: In this paper, structural uncertainties are modelled using stochastic and interval methods to quantify the uncertainties in the response quantities, and a comparison of these methods is illustrated using a shear frame with uncertain stiffness properties.