Showing papers in "Finite Elements in Analysis and Design in 1991"

TL;DR: In this paper, a new approach to produce acceptable quality meshes from a topologically valid initial mesh is presented and results indicate that the new method not only yields better quality elements when compared with the traditional Laplacian smoothing, but also guarantees a valid mesh unlike the LaPLacian method.

TL;DR: In this paper, the authors present a survey of 350 publications related to the finite element models of moderately thick shells, concentrating on those related to consistent displacement and stress/mixed/hybrid models.

TL;DR: In this article, the large-rotation snap-through characteristics of laminated cylindrical panels are investigated using a finite element method incorporating the "constant arc length" technique and Newton-Raphson method based on the assumption of parabolic transverse shear strains.

TL;DR: The breakdown of activities involved in finite element analysis from a solid model is used as a requirements definition and functional specification for software tools to facilitate automation of finite modelling and eventual integration of design and analysis.

TL;DR: In this paper, two-dimensional and three-dimensional analysis methods for global and local stress analysis are described. And representative structural analysis problems are presented to demonstrate the global/local methodologies being developed.

TL;DR: A preliminary set of primitives is developed which can be assembled into complete solid models that are defined in terms of a small set of design parameters, making it possible to modify the design interactively or through an automated design system.

TL;DR: In this article, a finite element formulation of the equations governing laminated anisotropic plates using Reddy's higher-order theory is presented, which takes into account the parabolic distribution of the transverse shear deformation through the thickness of the plate and contains the same unknowns as in the first-order shear deformable theory.

TL;DR: In this article, natural shape functions are derived for curved and twisted beam finite elements including shear deformation, which are exact solutions of the governing equations subject to boundary forces only.

TL;DR: In this paper, the use of penalty functions to treat a class of structural contact-impact problems is investigated, with emphasis on ones in which the impact phenomena are primarily nondestructive in nature and in which only the gross characterization of the response is required.

TL;DR: In this paper, a finite element analysis of elasto-viscoplastic Reissner-Mindlin plates is presented, where the discrete field equations are derived from a nonlinear version of the Hu-Washizu variational principle.

TL;DR: In this article, a C 0, three-node isoparametric finite element model is developed to study the whirl speeds of a rotor-bearing system with both internal viscous and hysteretic damping.

TL;DR: In this article, a solution method for dynamic analysis of elastic contact problems with rigid body motion under small deformation is presented, where the contact surface is assumed unbounded and frictionless.

TL;DR: In this paper, a finite element model is developed to study the large-amplitude free vibrations of generally-layered laminated composite beams and the influence of boundary conditions, beam geometries, Poisson effect, and ply orientations on the nonlinear frequencies and mode shapes are demonstrated.

TL;DR: In this paper, the authors describe an approach which combines the capabilities of a general-purpose program with a program specifically addressing design of rotor systems, which involves modeling the non-rotating portions in terms of a superelement/substructure.

TL;DR: In this article, a rational displacement interpolation function is proposed for axisymmetric analysis of incompressible solids, which can be implemented into a standard displacement finite element program simply by using a modified shape function matrix.

TL;DR: In this article, the effects of variations in lamination and material parameters of thin-walled composite frames on their vibrational characteristics were studied and a detailed study was made of the sensitivity of the vibrational response to variations in the fiber orientation, material properties of the individual layers, and boundary conditions.

TL;DR: In this paper, the analysis of elastomeric components (seals, gaskets), undergoing large deformations leading to potential surface folding-wrinkling-stretching, as well as localized bifurcations, is presented.

TL;DR: In this paper, the Taylor-Galerkin-based finite element method is applied to the calculation of incompressible viscous flows, which is second order accurate for velocity and pressure in time as well as in space.

TL;DR: In this article, a two-dimensional Taylor-Galerkin discontinuous finite element method for the computation of weak solutions of nonlinear hyperbolic conservation laws is presented, and the resulting scheme is explicit and solves the problem element by element.

TL;DR: In this paper, an a posteriori error estimation strategy for the boundary element solution of two-dimensional heat conduction problems is presented, which employs a least-squares fit of the solutions obtained from these equations.

TL;DR: In this paper, a study was made of the effects of 1, 5, 13, and 25 whiskers in the wake of a mode-I crack in a center-cracked plate.

TL;DR: In this article, the authors examined the field-consistency aspects involved in the formulation of a 27-noded Lagrangian hexahedral element for robust and reliable 3D modeling of constrained media problems.

TL;DR: In this paper, the p-version finite element method (p-FEM) was used to solve the steady-state compressible lubrication problem with infinite width gas bearing of infinite width.

TL;DR: In this article, the authors present a method for evaluating the structural reliability of a component when a general purpose finite element program is used for the analysis, where the advanced First Order Second Moment (AFOSM) method is used to estimate the probability of failure.

TL;DR: In this paper, an approach for the problem of coupling reduced order models based upon recent work by the authors in nonlinear multibody dynamics is introduced. But the approach is not suitable for the full-order model.

TL;DR: A procedure based upon the implicit decomposition for finite element formilations that provides a clear concept of parallelism for computing large-scale problems in a parallel environment.

TL;DR: In this article, an analytical procedure for the eigensolution of locally modified systems on the basis of the Sturm sequence property is proposed, which is useful for a modified system with many degrees of freedom.

TL;DR: A nonlinear analysis of a large engineered structural system damaged by a tornado is presented in this paper, where both material and geometric nonlinearities are included in the structural analysis, and a procedure developed and evaluated for localizing failures and minimizing damage in systems of this type subjected to extreme wind loads is presented.

TL;DR: In this article, a fast and compact calculation method based on finite elements was developed for the calculation of the nominal pressure distribution between a ski and a track, where the ski was modelled as a sandwich beam which included a shear core and the track was modeled as springs (constant stiffness in compression and zero stiffness in tension).

TL;DR: In this paper, the effect of magnetic shields on the magnetic field distortion in the space, due to the presence of the ferromagnetic material, has been evaluated in order to estimate the effect on the plasma magnetic confinement.