Showing papers in "Computers & Structures in 2007"

TL;DR: A new mesh movement algorithm for unstructured grids is developed which is based on interpolating displacements of the boundary nodes to the whole mesh with radial basis functions (RBF's), which can handle large mesh deformations caused by translations, rotations and deformations.

TL;DR: Improvements, effect of the different setting parameters, and functionality of the algorithm are shown in the scope of classical structural optimization problems, and results show the ability of the proposed methodology to find better optimal solutions for structural optimization tasks than other optimization algorithms.

TL;DR: In this paper, a Lagrangian model for the numerical simulation of fluid-structure interaction problems is proposed, where both fluid and solid phases are described by smoothing particle hydrodynamics: fluid dynamics is studied in the inviscid approximation, while solid dynamics is simulated through an incremental hypoelastic relation.

TL;DR: The results show that the HPSO algorithm can effectively accelerate the convergence rate and can more quickly reach the optimum design than the two other algorithms.

TL;DR: In this paper, a simple implicit time integration scheme for the transient response solution of structures when large deformations and long time durations are considered is proposed, which is a good candidate for practical analyses.

TL;DR: In this article, a multiionic transport model is proposed to describe the degradation of hydrated cement pastes exposed to pure water and sodium sulfate solutions, where the main algorithm is based on an operator splitting approach.

TL;DR: In this article, the wake dynamics of flexible slender systems undergoing vortex-induced vibration (VIV) are modeled using a distributed wake oscillator coupled to the dynamics of the slender structure, a cable or a tensioned beam.

TL;DR: In this paper, the Monte Carlo simulation procedure is used to analyze uncertainties in structural mechanics and analysis. But it is shown that the traditional deterministic conception can be easily extended by applying statistical and probabilistic concepts.

TL;DR: In this article, a perspective is given on fictitious domain methods for deformable bodies that exert large motions induced by unsteady flow, and the advantages, disadvantages and differences for the different approaches are discussed.

TL;DR: In this paper, the authors investigated the use of correlation-based damage detection methods for long-span, cable-stayed bridges, and proposed an approach based on the multiple damage location assurance criterion (MDLAC), which combines a correlationbased technique with a forward-type estimation of damage-sensitive structural parameters.

TL;DR: In this paper, a technique for strongly coupled fluid-structure interaction problems is presented, which uses the Jacobian from reduced order models that are built up during the coupling iterations.

TL;DR: In this article, a nonlinear dynamic problem of stall induced flutter oscillation subject to physical uncertainties is analyzed using arbitrary polynomial chaos, in which appropriate expansion polynomials are constructed based on the statistical moments of the uncertain input.

TL;DR: This work advances previous FSI studies by including the iliac bifurcation and localized intraluminal thrombus in patient-specific AAA models, demonstrating the importance of modeling blood flow for the assessment of AAA wall mechanics.

TL;DR: In this article, a generalised nth order stochastic perturbation technique that can be applied to solve some boundary value or boundary initial problems in computational physics and/or engineering with random coefficients is presented.

TL;DR: In this paper, a model is proposed for the ORTZ joint, which is established from the dimensions and properties of the different elements of which the joint is composed and considers the possibility of the material reaching its yield point.

TL;DR: In this article, the effect of laminate configuration on the flutter and divergence characteristics of composite plate wings with various sweep angles was investigated, and a minimum weight design was performed by using a genetic algorithm in which lamination parameters were used as design variables.

TL;DR: In this paper, an approach for the simulation of explosions of "energetic devices" is described, which is applicable to a wide range of fluid-structure interaction scenarios, the application to energetic devices is chosen because it demonstrates the full capability of this methodology.

TL;DR: In this paper, a one-dimensional mathematical model is presented which describes the acoustic behaviour of thick-walled liquid-filled pipes, based on conventional water-hammer and beam theories.

TL;DR: In this article, a statistical damage identification procedure for bridge health monitoring is presented, where a hierarchical sequence matching scheme is suggested for data normalization to account for the effects of various environmental and operational conditions on the structural dynamics.

TL;DR: In this article, the authors propose a finite element model of a cable-stayed bridge and show that a small variation of the mechanical parameters produces a flipping between local/global (cable/beam) modal shapes within the veering region.

TL;DR: In this article, the results of a numerical investigation concerning the elastic and elastic-plastic postbuckling behavior of cold-formed steel lipped channel columns affected by local-plate/distortional buckling mode interaction were obtained through analyses performed using the finite element code Abaqus.

TL;DR: A three-dimensional simulation of the formation of metachronal waves in rows of pulmonary cilia is presented, allowing a natural enforcement of boundary conditions without the need for smoothing of singular force distributions.

TL;DR: In this article, a new solution strategy that couples lattice Boltzmann (LB), large eddy simulation (LES), and discrete element (DE) methodologies for the simulation of particle-fluid systems at moderately high Reynolds numbers is presented.

TL;DR: In this article, a robust level-set-based approach that integrates a Lagrangian thin-shell finite element solver with fracture and fragmentation capabilities and an Eulerian Cartesian fluid solver was presented.

TL;DR: In this paper, the authors present the solutions of some benchmark problems, which can be used to evaluate existing and new formulations of incompressible fluid flows with structural interactions, as well as evaluate existing methods of analysis for the solution of fluid flow with structural interaction.

TL;DR: In this paper, the authors assess the global performance and underlying assumptions of a recently developed one-dimensional model characterising the elastic lateral-torsional buckling behavior of singly symmetric tapered thin-walled open beams, which is able to account for the influence of the prebuckling deflections.

TL;DR: In this article, an efficient return algorithm for stress update in numerical plasticity computations is presented, where the yield criterion must be linear in principal stress space and can be composed of any number of yield planes.

TL;DR: In this article, a generalization of the homogenization procedure to the out-of-plane behavior of masonry is presented, in such a way that the in-plane (membrane) and outofplane (bending) characteristics of a homogeneous equivalent plate can be derived in one step.

TL;DR: For the hyperelastic-viscoplastic large deformation problems considered here with varying levels of randomness in the input and boundary conditions, the NISG method provides highly accurate estimates of the statistical quantities of interest within a fraction of the time required using existing Monte Carlo methods.

TL;DR: In this article, a non-linear homogenization tool was used to estimate the compressive strength of masonry under compression, including the possibility of tensile and compressive progressive damage, both in the unit and mortar.