Showing papers in "Finite Elements in Analysis and Design in 1993"

TL;DR: A mesh smoothing technique that uses optimization principles to minimize a distortion metric throughout a mesh is presented and comparison is made with laplacian and isoparametric smoothing techniques.

TL;DR: In this article, a 3D finite element model for cord-reinforced rubber composites is proposed, characterized by superimposing so-called "rebar" elements, consisting of one or more reinforcing cord layers with arbitrary orientation, on corresponding 3D rubber elements.

TL;DR: In this article, non-uniform rational B-splines (NURBs) are used to describe the shape of a structure and a sensitivity analysis using NURB defined geometries is developed.

TL;DR: In this article, a boundary integral design sensitivity formulation for steady-state heat conduction problems is presented, and is applied to the design of cooling lines in injection moulds, and the sensitivity boundary integral equation is used for computation of the gradients of the defined objective function.

TL;DR: In this paper, a finite element sensitivity analysis is performed for a higher and lower-order truncated modal coupled structure-acoustic problem, to find out the rate of change of vibration responses of the body panels and sound pressure levels at the position of the ear of a vehicle passenger/driver.

TL;DR: In this paper, two damping models are developed, i.e., the viscoelastic damping (VED) model, and the specific damping capacity (SDC) model.

TL;DR: In this article, the authors propose to correlate a pair of vectors based on the MAC coefficient of a pair test and analysis mode shapes, which has resulted in better correlation than the element by element comparison approach.

TL;DR: In this paper, a nonlinear membrane theory for rubber-like shells accounting for large elastic strains is presented, which includes the hypereleastic model in terms of principal stretches which is often used to characterize rubberlike materials.

TL;DR: Numerical examples show the improved approximate method for computing eigenvector derivatives provides sufficient accuracy and reduced computation time when compared to the exact solution.

TL;DR: It is the opinion of the author, that at the present time, the finite element method is far from being completely automated for complex structures.

TL;DR: This bibliography contains references to published papers, conference proceedings and theses/ dissertations dealing with mesh generation and refinement for finite element and boundary element methods that were published in 1990–1993.

TL;DR: In this paper, a method of creating the stiffness matrix of a hexahedral eight-node finite element with a single, non-propagating, transverse, one-edge crack at half of its length is presented.

TL;DR: In this article, a control volume finite element scheme was proposed for numerical modeling of fluid flow problems. But it is not suitable for control volume discretization, as it requires an equal order interpolation for velocity and pressure.

TL;DR: In this article, a stress-based finite element error estimator for fracture mechanics analysis involving singular isoparametric crack tip finite elements is proposed for edge crack Mode I problem with six different singular and nonsingular element formulations at the crack tip region.

TL;DR: In this paper, a modified frequency response function sensitivity method is formulated and implemented to the validation of finite element models in the higher frequency range, based on the practical assumption that both measured modes and coordinates are incomplete.

TL;DR: In this paper, a nonlinear elastic isotropic experimentally based model is used to describe the behavior of concrete before cracking or crushing, and the softening behaviour of concrete in both cracking and crushing is implemented by decomposition of the total strain increment into a crack or crush strain increment and an intact concrete strain increment.

TL;DR: In this article, a finite element based on a discrete layer theory is developed for the purpose of analysis of conical shells with a constrained viscoelastic damping treatment, and the effects of core-to-facing thickness ratio, slant length and semi vertex angle of the cone on the frequencies and loss factors are investigated for three boundary conditions.

TL;DR: In this article, a stochastic finite element method for analysis of effects of spatial variability of material properties is developed with the help of a micromechanics approach, illustrated by evaluating the first and second moments of the global response of a membrane with microstructure of a spatially random inclusion-matrix composite under a deterministic uniformly distributed load.

TL;DR: In this paper, a special finite element is developed for efficient evaluation of stress concentration around a hole in complex structures, where the complex variable formulation is used to derive a special set of stress functions which embody the stress concentration effects of a hole.

TL;DR: In this paper, a new explicit integration scheme for finite deformation computational plasticity is presented, and the results are accurate and stable, but the integration scheme is not suitable for large deformations.

TL;DR: In this paper, the Galerkin weighted residual method has been applied to develop a one-dimensional finite element formulation for the coupled equations of heat and moisture flow in soils, which considers pressure and temperature as the dependent variables and is sufficiently general to accommodate various types of initial and boundary conditions.

TL;DR: In this paper, the orthogonality and normalization conditions of a coupled structural-acoustic system were derived for the cabin model and applied to an interior noise problem of a cabin model.

TL;DR: In this article, an orthogonality condition of a coupled acoustic-structural system was proposed to compensate the effect of truncated modes, which are lower and higher modes beyond the frequency domain of an MFR analysis.

TL;DR: In this paper, geometric aspects of the shape optimization procedures, as related to intermediate mesh refinement, are discussed and categorized into three different groups based on the magnitude of shape changes in the finite element model, during the iterative redesign process.

TL;DR: In this article, a review of some basic concepts in damping and how damping is treated in finite element analysis is presented, and some new techniques that have been developed to support optimization of damping for structures.

TL;DR: In this paper, a C 0 finite element space discretization procedure is employed in a general fibre-reinforced composite cylindrical shell theory based on a higher-order displacement model.

TL;DR: In this article, the authors explore the role of the displacement method in modern finite element analysis and present a methodology which once competed, toe-to-toe, with the form of finite-element analysis that is universally in use today.

TL;DR: In this article, a method is presented for correcting finite element models by referring their modal parameters to experimental modal data, based upon both the sensitivity analysis and the least squares method, and gives a physically realistic solution of appropriate design variables.

TL;DR: In this article, the critical strain energy density was used for crack initiation and stable crack growth under monotonic loading in steels using an elastic-plastic finite element analysis.

TL;DR: In this article, the concept of constrained and non-constrained zones of concrete due to the presence of reinforcement is developed and a reinforcement confinement coefficient is proposed, and a flexible method for the modeling of reinforcement with arbitrary orientation and not passing the nodes of the concrete element is also proposed.