Showing papers in "Computers & Structures in 1988"

TL;DR: A simple and efficient non-numerical algorithm for the automatic decomposition of an arbitrary finite element domain into a specified number of balanced subdomains is presented and it is shown that both the algorithm and its implementation are suitable for shared memory as well as local memory multiprocessors.

TL;DR: In this article, a finite element for the cracked prismatic beam is developed to evaluate the dynamic response of a cracked cantilever beam to harmonic point force excitation, which can be used in any appropriate matrix analysis of structures program.

TL;DR: Three modifications are proposed whose combined effect is to correct deficiencies of Cook's four-noded quadrilateral while preserving satisfaction of the C 0 patch test and improved accuracy for the modified element rivaling, and in some cases exceeding, that of the eight- noded isoparametric with reduced order integration.

TL;DR: In this paper, the authors describe procedures for the form-finding, analysis and fabrication patterning of wide span cable net and prestressed membrane roofs based on the Dynamic Relaxation (D.R.) method with kinetic damping.

TL;DR: In this paper, an alternative approach to the classical chance constraint optimization technique is presented, which employs an advanced second-moment method in evaluating the probabilities of violating the constraints and is applied to the optimal design of a simple structure.

TL;DR: In this paper, a projection matrix, P, which depends on the rigid body modes and acts on nodal forces, f, independent of the element formulation is derived for enforcing invariance to rigid body motion.

TL;DR: In this paper, an isoparametric stiffened plate element is introduced for the free vibration analysis of eccentrically stiffened plates, which is applicable to both thick and thin plates.

TL;DR: In this article, the numerical treatment of contact problems with friction is considered, starting from the algebraic stiffness equation of two discretized linear elastic bodies and taking the contact and friction laws into account, a new type of Linear Complementarity Problem (LCP) is suggested.

TL;DR: In this paper, an 18-node solid element was developed to model the behavior of laminated composite shells undergoing large deflection, which allows analytical integration through the thickness regardless of ply layups.

TL;DR: General purpose parallel Fortran subroutines are presented for the solution of sparse and dense symmetric systems of linear equations and constitute an efficient tool that can be easily implemented on already existing sequential out-of-core direct solvers.

TL;DR: In this paper, a finite element which embeds a localization band within the element by means of an assumed strain formulation is described in the context of general nonlinear theory, which allows the treatment of shear bands which are much smaller than the element size and hence is called a sub-h localization method.

TL;DR: In this article, a projection matrix, P, which depends on the rigid body modes and acts on nodal forces, f, independent of the element formulation, is derived for enforcing invariance to rigid body motion.

TL;DR: In this article, the problem of transient dynamics of highly flexible three-dimensional space-curved beams, undergoing large rotations and stretches, is treated, and the case of conservative force loading, which may also lead to configuration-dependent moments on the beam, is considered.

TL;DR: In this article, an 18-node solid element was developed to model the behavior of laminated composite shells undergoing large deflection, which allows analytical integration through the thickness regardless of ply layups.

TL;DR: In this article, linear finite element models based on Mindlin's shear distortion theory for bending of eccentrically stiffened plates subjected to transverse loading are presented and the superiority of one over the other is discussed.

TL;DR: In this article, a numerical procedure for the solution of contact problems with Coulomb friction based on a complementarity problem formulation is developed for an incremental step, where two-dimensional elasticity problems discretized by the boundary element method are used for detailed derivation of the complementarity equations.

TL;DR: In this paper, a unified algorithm for the analysis and design of pin-jointed structures of both classes, consisting of any combination of bars and cables, is presented, based on the flexibility method of structural analysis, and assumes small displacements.

TL;DR: In this paper, a geometrically nonlinear finite element procedure based on an updated Lagrangian description of the eight-node degenerated shell element is used for the finite element modeling of the laminated shell structure.

TL;DR: In this paper, a combination of adaptive remeshing techniques, flow solvers for transient problems with moving grids, and integrators for rigid body motion is presented, which allows the economic simulation of fully coupled fluid-rigid body interaction problems of arbitrary geometric complexity.

TL;DR: In this article, a two-dimensional finite element computational procedure is developed for the accurate analysis of the strains and stresses in adhesively bonded joints, and a delayed failure criterion based on the Reiner-Weisenberg failure theory has also been implemented in the finite element code.

TL;DR: In this paper, a finite element formulation for flexure of a generally orthotropic plate based on a higher-order displacement model and a three-dimensional state of stress and strain is presented.

TL;DR: In this paper, a finite element model is applied to the vibration and stability of a rotating blade with a single edge crack, and the effects of transverse shear deformation and rotatory inertia are taken into account.

TL;DR: In this paper, the authors developed several modular structural analysis packages capable of predicting the probabilistic response distribution for key structural variables such as maximum stress, natural frequencies, transient response, etc.

TL;DR: In this paper, a Simplex type algorithm is used to impose frictional contact conditions on finite element models of bodies that move close to trajectories that can be determined from kinematic constraints on the bodies.

TL;DR: The Generalized Midpoint Rule and the Generalized Closest Point Projection Method (GCPM) are discussed in this article, where numerical analyses support the conclusion that midpoint integration is preferred for small and moderate strain increments, while the Backward Euler rule is best suited when large strain increments can be anticipated, e.g. in zones of localized deformation and in large deformation plasticity.

TL;DR: The Generalized Midpoint Rule and the Generalized Closest Point Projection Method (GCPM) are discussed in this article, where numerical analyses support the conclusion that midpoint integration is preferred for small and moderate strain increments, while the Backward Euler rule is best suited when large strain increments can be anticipated, e.g. in zones of localized deformation and in large deformation plasticity.

TL;DR: In this article, the energy method and symbolic aided analysis provide analytical expressions for the critical buckling load of tapered columns, which applies to any column whose cross sectional variation can be written as a function of the axial coordinate.

TL;DR: In this paper, the effect of the elastic foundation on the natural frequencies, the static buckling loads and the regions of dynamic instability of the Timoshenko beams with different end conditions is investigated.

TL;DR: This paper proceeds from the field-consistency paradigm to understand why the original element and even the element modified by the 2 ∗ 2 Gaussian rule cannot achieve, consistently, the true shear strain constraints in the penalty limit of thin plate behaviour, and derives the optimal shear strains definitions that leave the element free of all problems in the rectangular form.

TL;DR: In this paper, a two dimensional finite element analysis has been made for a fiber-reinforced composite laminate subjected to circularly distributed impact load which results, for example, from impacting the plate with a blunt-ended projectile.