Showing papers in "Computers & Structures in 1991"

TL;DR: In this article, the static and dynamic interaction between a bonded piezoelectric actuator and an underlying beam substructure is investigated using four different displacement-based finite element models all of which are derivable from the generalized laminate plate theory of Reddy.

TL;DR: An investigation into the application of the genetic algorithm in the optimization of structural design and the basic operations of selection, crossover, mutation and parameter scaling are presented.

TL;DR: An overview of the neural computing approach is presented, with special emphasis on supervised learning techniques adopted in the present work, which provide computationally efficient capabilities for reanalysis and appear to be well suited for application in numerical optimum design.

TL;DR: In this article, the accuracy and convergence of the method of differential quadrature for solving a variety of differential equations with variable coefficients associated with plate and beam instability problems were discussed.

TL;DR: A simple but versatile 3D triangulation scheme based on the advancing front technique for the discretization of arbitrary volumes is presented and it is found that high-quality tetrahedron element meshes are obtained by the proposed algorithm.

TL;DR: In this article, a finite element analysis of shell structures with thin piezo-electric layers bonded to the surfaces is presented and a finite shell element is presented, allowing for the computation of these advanced composite structures.

TL;DR: A more in-depth presentation is given of a structural analysis program being developed using an object-oriented approach, which provides a further illustration of the usefulness and potential of the object- oriented perspective.

TL;DR: In this paper, the authors used two distinct meshes (one global and one local) to perform global and local stress analysis and used an iterative procedure to enforce equilibrium between the two regions.

TL;DR: In this article, a linear analysis for a simply-supported symmetrically laminated composite plate embedded with SMA fibers using the Rayleigh-Ritz method is presented, and two novel structural control techniques, active strain energy tuning (ASET) and active property tuning (APT), are highlighted and the authority of each technique demonstrated.

TL;DR: In this paper, a finite element model (FEM) is applied to a simply-supported square plate and a cantilever plate with a through crack, and the eigenfrequencies are determined for different crack lengths.

TL;DR: In this paper, a seven degree of freedom finite element model for laminated composite plates is developed, which utilizes three displacements, two rotations of normals about the plate midplane, and two warps of the normals, to accurately and efficiently determine the laminate stresses.

TL;DR: In this paper, the thermal buckling behavior of composite laminated plates subjected to uniform or non-uniform temperature fields is analyzed with the aid of the finite element method, and the effects of lamination angle, modulus ratio, plate aspect ratio, and boundary constraints upon the critical buckling temperature are significant.

TL;DR: In this paper, large amplitude free flexural vibrations of laminated orthotropic plates were studied using C 0 shear flexible QUAD-8 plate element and the nonlinear governing equations were solved using the direct iteration technique.

TL;DR: A two-dimensional automatic mesh generation technique has been proposed for composites, in which the second phase consisting of particulates or unidirectional fibers are randomly dispersed in the matrix to yield an aggregate of convex polygons.

TL;DR: In this article, the effects of moisture and temperature on the bending characteristics of laminated composite plates are investigated by using the finite element method using the quadratic isoparametric plate bending element which takes transverse shear deformation into account.

TL;DR: In this article, the authors present a formulation for contact problems with friction for large deformations where all inequality constraints are enforced explicitly, and a robust solution technique for the resulting system of nonlinear equations can then be used.

TL;DR: In this paper, a finite element technique based on the first-order shear deformation theory is employed to predict the shell response and post-critical equilibrium paths are traced using the arc-length and the Riks methods.

TL;DR: In this article, a structural optimization algorithm is developed for geometrically nonlinear three-dimensional trusses subject to displacement, stress and cross-sectional area constraints, which is obtained by coupling the nonlinear analysis technique with the optimality criteria approach.

TL;DR: A formulation appropriate to the development of equilibrated hybrid finite elements is presented in this article, where techniques to overcome the problems traditionally associated with these elements are discussed along with the characteristics of the elements obtained.

TL;DR: A simple and efficient algorithm is described for automatic decomposition of an arbitrary finite element domain into a specified number of subdomains for finite element and substructuring analysis in a multi-processor computer environment.

TL;DR: In this paper, the authors compared the performance of the integrated force method (IFM) and the stiffness method (SM) relative to the structure of their respective equations, their conditioning, required solution methods, overall computational requirements and convergence properties as these factors influence the accuracy of the results.

TL;DR: A boundary data pre-processor for discretization of arbitrary objects into tetrahedron elements using the advancing front approach to solve the problem of 3D mesh generation.

TL;DR: In this paper, the authors proposed a nonlinear finite element analysis of reinforced concrete structures under monotonic loading, where an elastic strain hardening plastic stress-strain relationship with a nonassociated flow rule is used to model concrete in the compression dominating region and an elastic brittle fracture behavior is assumed for concrete in a tension dominating area.

TL;DR: In this article, a higher-order shear deformation theory is presented for the analysis of laminated anisotropic shells of revolution, based on realistic approximation of the in-plane displacements through the thickness.

TL;DR: A survey of the results related to approach of hierarchic modeling of the plate problems can be found in this paper, where the main ideas are explained and illustrated by numerical examples, as well as the main features of the approach.

TL;DR: In this paper, the effects of increasing strain rate on the tensile strength of concrete were investigated using a split-Hopkinson pressure bar (SHPB) and finite element method (FEM) analysis.

TL;DR: It is clearly demonstrated that the present parallel computing system requires a much smaller amount of computational memory than the conventional finite element method and also that, due to the feature of dynamic workload balancing, high performance is achieved even in a large scale finite element calculation with irregular domain decomposition.

TL;DR: In this article, the characteristics of thermal stress analysis of a mass concrete structures that the finite elements should be added according to the casting schedule of concrete and the elastic modulus of concrete should be increased with time.

TL;DR: In this paper, a finite element formulation of finite deformation analysis of an arbitrarily curved, extensible, shear-flexible, elastic planar beam is presented, which is based on a modified Hu-Washizu variational principle in which exact nonlinear kinematic equations of Reissner [J. Appl. Math. (ZAMP)23, 795-804 (1972)] are taken into account.

TL;DR: In this paper, a linear complementarity formulation of the problem with rigid body displacements and rotations is proposed and numerically treated by a complementary pivoting technique, where the rigid body modes must be compatible with the inequality constraints.