Showing papers in "Computers & Structures in 1990"

TL;DR: In this paper, a finite element formulation is presented which is based on a new frictional interface law and fully implicit algorithmic treatment for the integration of the constitutive relations and the dynamics.

TL;DR: The design, implementation, operation, validation, and maintenance of this program is compared to that of an equivalent procedural program to identify the advantages of the object-oriented approach.

TL;DR: In this paper, a general class of sampling distributions is considered, denoted as the class of mixed ǫ-gm-centred standard Gaussian and D -truncated ūgm-centered normal Gaussian distributions and the relative efficiency of different choices of the sampling distribution from the class is studied by way of examples for probability integration.

TL;DR: In this article, a nonlinear static analysis of three-dimensional long-span cable-stayed bridges under the effect of their own dead weight and a set of initial cable tensions is formulated.

TL;DR: In this article, the relationship between the DKT (Discrete Kirchhoff Theory) element and the Reissner-Mindlin assumptions has been discussed and the reasons for their success explained.

TL;DR: In this paper, a vibration study on rectangular plates, with various combinations of boundary conditions which involve free edges, is carried out by using a very accurate and computationally efficient, newly developed orthogonal plate function in the Rayleigh-Ritz procedure.

TL;DR: In this article, the forced vibrations of the beam and the effects of the crack locations and sizes on the vibrational behavior of the structure are studied. And a basis for crack identification is discussed.

TL;DR: In this article, the elastic constants of a one-ply plain weave composite using the strain energy equivalency principle with the aid of the finite element method were analyzed using a finite element model.

TL;DR: In this paper, the relative performance of two simple analytical methods to model multiple-support seismic analysis of large structures is investigated, and it is found that the LMM is able to yield results that are almost identical to those of the RMM using large mass values equal to approximately 107 times the total mass of the bridge.

TL;DR: The method employs spline interpolation functions which satisfy the linear plate bending equation to determine displacements and rotations from a global model which are used as “boundary conditions” for the local model.

TL;DR: In this article, a finite element formulation of the linear biphasic model for articular cartilage and other hydrated soft tissues consisting of an incompressible, inviscid fluid phase and a solid phase is presented, and the Galerkin weighted residual method is applied to the momentum equation and mechanical boundary conditions of both the solid phase and the fluid phase.

TL;DR: An algorithm is developed that meets the requirement to obtain solutions where all or some of the design variables take their values from a given set of discrete values, while finding global solutions for the mixed-discrete problem.

TL;DR: In this paper, a review of the advances of the formulations for thin shell finite elements in the form of flat plates, axisymmetrical shells, and curved shells is presented, and the Discrete Kirchhoff Theory shell elements and the degenerated shell elements are discussed.

TL;DR: In this paper, the dynamic stability of laminated composite plates due to periodic inplane loads is investigated using the Galerkin finite element model, including the effects of transverse shear deformation and rotary inertia.

TL;DR: An isoparametric stiffened plate bending element for the buckling analysis of stiffened plates has been presented in this paper, where the stiffener can be positioned anywhere within the plate element and need not necessarily be placed on the nodal lines.

TL;DR: Many finite element models have been proposed for the analysis of sandwich plates as mentioned in this paper, and these models can be classified into two broad streams: the assumed displacement approach and the assumed-stress hybrid approach.

TL;DR: In this article, the authors used finite element techniques to predict the initial filling pressure of cylindrical silo walls, at least for the first filling condition, and they compared these results with existing predictions for initial filling pressures in deep stiff-walled silos.

TL;DR: In this article, a two-dimensional curved beam element formulation with higher-order transverse shear deformation for linear static analysis of laminated composites is presented, where the displacement approximation in the transverse direction can be of arbitrary desired polynomial order p, thereby permitting strains of at least order (p − 1).

TL;DR: In this article, an isoparametric finite element formulation based on a higher order displacement model for dynamic analysis of multilayer unsymmetric composite plates is presented, and the Newmark and Wilson-θ schemes are used for time integration of the discrete coupled second-order ordinary differential equation system of dynamic equilibrium.

TL;DR: In this article, a return mapping algorithm for the Hoffman yield function of anisotropic plasticity has been developed, and the accuracy of the algorithm was assessed by means of iso-error maps for trial stress increments in the deviatoric and volumetric plane.

TL;DR: In this paper, the two types of design systems under review are based on the dynamic relaxation and force density methods, and a new procedure for generating cutting patterns, using a two-dimensional dynamic relaxation analysis for each cloth, is proposed.

TL;DR: In this article, a low-velocity impact-damage model for quasi-symmetric graphite-fiber composite plates is presented and the distribution of damage in each layer of the plate is calculated by employing Di Sciuva's composite laminate theory together with Hashin's failure criterion for fiber-reinforced composites.

TL;DR: A critical analysis of parallelogram-shaped plates under bending using a Mindlin nine-node Heterosis element is carried out in this paper, where the performance of this quadratic quadrilateral element is evaluated on isotropic rhombic skew plates up to large skew angles with different support conditions.

TL;DR: In this article, an algorithm based on a finite element approach has been developed to study the transient response of plates with arbitrary boundary conditions and subjected to moving loads, where thin plate theory is assumed for the plate model and no restriction is placed on the loading conditions.

TL;DR: A degenerate shell element with a degenerate curved beam element as a stiffener is developed for the geometric nonlinear analysis of laminated, anisotropic, stiffened shells as discussed by the authors.

TL;DR: In this article, a scheme for active control of nonlinear vibration of space-structures, wherein each member is modeled as a beam-column, is presented. And the expressions for shear stresses transmitted to the structural member by the distributed segmented piezo-electric actuators, which are bonded on the surfaces of the member, are derived in the general case in which the structural part is subjected to moments, transverse shear forces and an axial force.

TL;DR: In this article, a series on the variational basis of high performance elements is presented, with emphasis on those constructed with the free formulation (FF) and assumed natural strain (ANS) methods.

TL;DR: In this article, the effect of transverse shear deformation on the thermal buckling behavior of simply supported composite plates with symmetric cross-ply laminations was investigated.

TL;DR: In this article, a computational method for the simulation of damage and fracture propagation in laminated composites is presented, where a quantitative evaluation of the global fracture toughness of composites was shown as a tool for monitoring the fracture stability of composite composites under sustained loading.

TL;DR: In this article, a step-by-step dynamic finite element analysis is presented in which a provision is made for a three-dimensional isoparametric element existing in the target metal plate.