Showing papers in "Computers & Structures in 1999"

TL;DR: In this paper, a procedure for generating random aggregate structures for rounded and angular aggregates based on the Monte Carlo random sampling principle is proposed and a method of mesh generation using the advancing front approach is developed.

TL;DR: In this article, the ADINA system is integrated within computer-aided design using the available ADINA modeler and CAD interfaces for analysis of fluid flows fully coupled with structural interactions.

TL;DR: In this paper, a new technique for the limit state analysis of arcuate masonry vaults is described, which involves modelling the principal stresses in a masonry vault as a discrete network of forces.

TL;DR: In this article, a two-node catenary cable element, derived using exact analytical expressions for the elastic catenary, is proposed for the modeling of cables, and the cable element tangent stiffness matrix and internal force vector are evaluated accurately and efficiently using an iterative procedure.

TL;DR: In this paper, a continuum based three-dimensional shell element for the nonlinear analysis of laminated shell structures is derived, based on the standard eight-node brick element with tri-linear shape functions.

TL;DR: In this paper, three methods for smoothing meshless approximations near nonconvex boundaries such as cracks are reviewed and compared: diffraction method, which wraps the nodal domain of influence a short distance around a point of discontinuity, such as a crack tip; transparency method, gradually severs the domains of influence near crack tips; and see-through method, or continuous line criterion.

TL;DR: In this article, the authors deal with topology optimization of statically loaded or freely vibrating disk and plate structures, and with layout optimization of different types of integral rib-reinforcement of plates.

TL;DR: In this paper, an axisymmetric model is used to simulate the perpendicular impact of an elastic sphere against an elastic-plastic surface, which is then transformed into a three-dimensional model in order to investigate the effect of adjacent shots.

TL;DR: In this article, a nonlinear finite element method suitable for mesoscopic study of concrete is developed and applied to study the strain localization of concrete under uniaxial tension in a numerical example.

TL;DR: In this article, a complete set of linear equations of the second-order theory of laminated composite plates are obtained, and a generalized Levy type solution in conjunction with the state space concept is used to analyze the free vibration behavior of cross-ply and antisymmetric angle-ply laminated plates.

TL;DR: In this article, the mechanical properties of the cellular structure of wood are characterized and modelled, the irregular cell shape, the anisotropic layered structure of the cell walls and the periodic variations in density being taken into account.

TL;DR: In this article, the authors review and explain the techniques used to analyse symmetric structures subject to a general loading and introduce the most general way of describing the full symmetry properties of a structure based on group representation theory, and show how this approach can be used to systematically simplify a structural analysis.

TL;DR: In this article, a 3D thin-wall model with flow-structure interactions was introduced and solved using ADINA to investigate the wall deformation and flow properties of blood flow in carotid arteries with symmetric and asymmetric stenoses.

TL;DR: In this paper, a finite element (FE) code based on an arbitrary Lagrangian-Eulerian (ALE) formulation has been developed, which allows a natural treatment of the cracking of work material.

TL;DR: In this article, a finite element for damped sandwich beam structures is presented, which combines the polynomial shape functions of conventional finite element analysis with Galerkin orthogonal functions.

TL;DR: In this article, a symmetry reduction method is proposed, implemented and studied to stabilize topology design formulations, with the added benefit of greatly simplified design sensitivity analysis of non-simple repeated vibrational eigenvalues which occur in many symmetrical structures.

TL;DR: This paper considers the evaluation of parallel schemes for engineering problems where the solution spaces may be very complex and highly constrained and function evaluations vary from medium to high cost and provides guidelines for the selection of appropriate schemes for Engineering problems.

TL;DR: In this paper, a stochastic dynamic response analysis of submerged floating tunnels subjected to wave loading is presented for the purpose of establishing force, damping and mass coefficients for structural elements with three-dimensional flow conditions, fluid/structure interaction is modeled as finite element implementation of the Navier-Stokes equation.

TL;DR: In this paper, a multi-loop feedback control design is developed and applied to an offshore steel jacket platform, which is subjected to wave-induced self-excited hydrodynamic forces.

TL;DR: In this article, the behavior of a composite consisting of aligned thermoelastic reinforcements embedded in a thermo-elasto-plastic matrix is described by an incremental Mori-Tanaka mean field approach.

TL;DR: In this paper, a three-dimensional thick-wall model with fluid-structure interactions was introduced and solved using ADINA to investigate the wall stress and strain distributions and flow properties of blood flow in carotid arteries with symmetric and asymmetric stenoses.

TL;DR: A new architecture for finite element analysis software, developed using object-oriented design, is presented, capable of the modeling and simulation of structural behavior, including the consideration of nonlinear static and dynamic effects.

TL;DR: In this paper, the authors used the ADINA 7.1 sparse solver to solve the contact forces between brake pad and counter body (drum or disk) for both types of brake systems.

TL;DR: In this paper, an analysis of the vibration and stability of a non-uniform cracked Timoshenko beam subjected to a tangential follower force distributed over the center line by use of the transfer matrix approach is presented.

TL;DR: In this article, a mixed finite element formulation based on the Mindlin-Reissner plate theory is developed for a moving orthotropic thin plate, where the finite element interpolations are selected according to the MITC (mixed interpolated tensorial components) plate bending elements, which have recently been proven to satisfy, numerically, the inf-sup condition.

TL;DR: The CONTRAST approach as discussed by the authors decomposes an assemblage into substructures and interfaces, and then uses a finite element (FE) method to solve the local nonlinearities of contact and friction.

TL;DR: In this article, the authors present a computational model for the topology optimization of a three-dimensional linear elastic structure using a material distribution approach and the optimization criterion is the structural compliance, subjected to an isoperimetric constraint on volume.

TL;DR: In this paper, the authors define contact fatigue as a kind of damage caused by changes in the material microstructure which results in crack initiation followed by crack propagation, under the influence of time-dependent rolling and/or sliding contact loads.

TL;DR: In this article, a numerical study for structural control using a tuned liquid damper (TLD), which consists of a solid tank filled with liquid, is presented, where the Newmark's β method is used for the time discretization.

TL;DR: In this paper, a nonlinear finite element analysis of adhesively bonded joints considering the elastoviscoplastic constitutive model of the adhesive material and the finite rotation of the joint is presented.