Showing papers in "Finite Elements in Analysis and Design in 2001"

TL;DR: In this paper, real-coded genetic algorithms (GAs) have been used to optimize truss-structures for finding optimal cross-sectional size, topology, and configuration of 2-D and 3-D trusses to achieve minimum weight.

TL;DR: In this paper, a sensitivity-analysis-based finite element (FE) model updating method has been used for condition assessment of bridges with particular reference to bridges, including specific considerations for FE modeling for updating and the model updating procedure for successful condition assessment.

TL;DR: In this paper, the authors considered a plate/shell structure with thin PZT piezoceramic layers embedded on top and bottom surfaces to act as distributed sensor and actuator.

TL;DR: In this paper, a generalization of topology optimization of a linearly elastic structure subject to design-dependent loads is presented, where a new approach based on applying a fictitious thermal loading to simulate this dependent load is proposed.

TL;DR: In this article, a variational framework and numerical implementation strategy for contact smoothing algorithms in large deformation finite element analysis is presented, improving the robustness of the numerical procedure and eliminating many of the contact force oscillations given by more traditional procedures.

TL;DR: In this article, the authors discuss a new evolutionary strategy for the multiple objective design optimization of internal aerodynamic shape operating with transonic flow, inspired from lions' new distributed control approach (J.L. Lions, Distributed active control approach for pde systems, Fourth WCCM CD-ROM, Buenos Aires, Argentina, 1998).

TL;DR: The merit of the proposed methodology is computational efficiency without compromise on accuracy and this is demonstrated through some example problems.

TL;DR: In this article, various finite element models for tailor-welded blank (TWB) including a heat-affected zone (HAZ) are presented and an appropriate model based on the considerations of accuracy and computing efficiency is suggested.

TL;DR: In this article, a method to analyze pneumatic envelopes through a penalty parameter modified constitutive relation embedded in a non-linear finite element code is presented, which is also adaptable to the user-provided material function port available with many commercial finite element codes.

TL;DR: A three-dimensional finite element analysis of teeth is presented and the stress distribution in the teeth restored with a few variants of posts is compared.

TL;DR: In this article, a new kind of rivet element taking material non-linearities into account was developed to improve prediction of the dynamic behavior for a frame assembled with 700 rivets.

TL;DR: In this paper, the authors describe the development, modification, and refinement of a finite element model of a four-door sedan, which can be used in computational simulations of full frontal, offset frontal, side, and oblique car-to-car impacts.

TL;DR: In this article, the free vibration analysis of liquid-storage tanks is considered and a rapid convergent iterative numerical scheme for computing added-mass matrices, as well as a modified numerical procedure for the seismic analysis is proposed.

TL;DR: In this paper, a beam-column element for the nonlinear analysis of partially connected composite beams is presented, which is based on a two-field mixed variational principle, where both variables, forces and deformations, are simultaneously approximated within the element.

TL;DR: The aim of this paper is to present and discuss the used of genetic algorithms and geometric modeling by means of β-splines surface representation in order to solve tri-dimensional shape optimization problems and to show the great applicability of the developed tool.

TL;DR: In this paper, the so-called umbrella model of spot welds and the radial stresses around a spot weld were introduced into the optimization process, and two formations were considered: one maximizes the stiffness of a structure under fatigue life constraints and the other seeks the maximum fatigue life of the structure.

TL;DR: In this article, a three-dimensional finite element program that simulates the construction process of mass concrete is presented, where temperature and stress variation of a concrete block is analyzed and results show that temperature plays an important role in concrete structures.

TL;DR: A practical approach that takes advantage of the global-searching ability of GA, yet also considers the instability of explicit finite element analysis showed that global searching cannot be ignored at least in the current example.

TL;DR: In this paper, two frame structure optimisation problems are handled: the constrained minimum-mass problem, for which both continuous and discrete cases with ideal and real (with buckling effect and its own gravitational load) models are solved with several types of genetic algorithms.

TL;DR: In this paper, the problem of multidisciplinary design and optimization (MDO) of a diffuser for a steady, incompressible magnetohydrodynamic (MHD) flow was considered.

TL;DR: In this article, a three-dimensional simulation of the manufacturing of cross-branch components using a solid bulging medium is presented, where the effect of varying friction between the bulging media and the tube is examined and the history of development of the bulge and stress conditions in the formed component are presented.

TL;DR: In this article, the reduction of anodic connector electrical losses was investigated through a combination of simple experiments and weakly coupled thermo-electro-mechanical finite element models.

TL;DR: In this article, a method for dynamic response analysis of spinning tapered Timoshenko beams utilizing the finite element method is developed, which includes the effects of Coriolis forces, shear deformation, rotary inertia, hub radius, taper ratios and angular setting of the beam.

TL;DR: In this paper, a mathematical model is developed to analyse the thermochemical response of a widely used GRP sandwich panel, consisting of two glass-fibre/polyester GRP outer skins and calcium silicate (Vermiculux) sandwich material in between.

TL;DR: In this article, the dynamics of plates treated with active constrained layer damping (ACLD) are modeled using the classical and the layer-wise laminate plate theory, and two multi-layer finite models simulate the interaction between the base plate, the piezo-electric sensor/actuator, the viscoelastic damping layer and the control laws.

TL;DR: In this paper, the effects of design parameters on static and dynamic performance of spindle bearing systems are analyzed in order to establish the requirement for design modifications, and the paper proposes a number of examples, along with a set of guidelines for the design of machine tool spindles.

TL;DR: In this article, an optimization procedure aimed at the design of multicomponent airfoils for high-lift applications is described, which is based on a multiobjective genetic algorithm; two flow solvers have been coupled with the genetic algorithm.

TL;DR: In this paper, the authors used virtual prototyping modeling techniques based on the finite element method to provide an accurate description of the material flow, filling conditions and corresponding geometrical profiles.

TL;DR: In this paper, a geometrically nonlinear finite-volume method was proposed to predict contact drape deformations of woven fabrics and garments interacting with rigid objects or human bodies.