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Showing papers in "Finite Elements in Analysis and Design in 1998"


Journal ArticleDOI
TL;DR: In this paper, an efficient reliability analysis is developed by approximating the limit-state functions using two-point adaptive nonlinear approximation, which is constructed by using the function values and the first-order gradients at two points of the limit state function, and its nonlinearity index is automatically changed for different problems.

125 citations


Journal ArticleDOI
TL;DR: In this paper, a three-dimensional nonlinear finite element analysis is made of the dovetail region in aeroengine compressor disc assemblies using contact elements, and the effect of the critical geometrical features, such as flank length, flank angle, fillet radii and skew angle upon the resulting stress field is examined.

74 citations


Journal ArticleDOI
TL;DR: In this paper, the powder compaction process is simulated by a large displacement finite element method based on a total and updated Lagrangian formulation, using a combination of the Mohr-Coulomb and elliptical yield cap model.

68 citations


Journal ArticleDOI
TL;DR: In this paper, the problem of finding the optimum thickness distribution of isotropic plate structures, with a given volume and layout, that would maximise the buckling load is discussed.

65 citations


Journal ArticleDOI
TL;DR: In this paper, a combined finite/discrete element method is developed to model delamination behavior in laminated composites and a penalty based algorithm is employed to evaluate the interlaminar stress state.

58 citations


Journal ArticleDOI
TL;DR: In this article, the optimal bead orientation problem of 3D shell/plate structures is investigated for both static and dynamic cases using a bending equivalent orthotropic shell design cell model, and it is solved by a new energy based method.

55 citations


Journal ArticleDOI
TL;DR: In this paper, a solid shell element model with six degrees of freedom per node is applied to buckling and postbuckling analysis of geometrically nonlinear shell structures, which allows changes in the thickness direction and does not require rotational angles or parameters for the description of the kinematics of deformation.

43 citations


Journal ArticleDOI
TL;DR: In this article, a finite element algorithm is presented for filling of moulds which also models the solidification effects such as the formation of cold shuts during the process, and the incompressible Navier-Stokes equations are solved using the Galerkin finite element method.

38 citations


Journal ArticleDOI
TL;DR: In this article, a new approach for the analysis of plates of arbitrary shapes is used which successfully models the arbitrary shape of the plate like isoparametric element, as the shear deformation is ignored by using Kirchhoff plate element.

38 citations


Journal ArticleDOI
TL;DR: In this article, an efficient framework for the numerical analysis of finite deformation behavior of elastic-rate-independent plastic problems is summarized, which is based on a plastic predictor method.

35 citations


Journal ArticleDOI
TL;DR: In this paper, a finite element study is conducted to determine the thermal response of a widely used glass reinforced plastic panel exposed to fire, based on a formulation developed previously by the authors and improved by including the moisture and temperature-dependent thermal properties and a newly developed time-dependent non-linear mixed boundary condition at the unexposed surface of the panel.

Journal ArticleDOI
TL;DR: In this paper, ideas from the analysis of differential-algebraic equations are applied to the numerical solution of frictionless contact/impact problems in solid mechanics, and two formulations for dynamic contact-impact within the context of the finite element method are derived.

Journal ArticleDOI
TL;DR: In this article, a finite element automobile model for use in crash safety studies was developed through reverse engineering, which was designed for calculating the response of the automobile structure during full frontal, offset frontal, or side impacts.

Journal ArticleDOI
TL;DR: In this paper, design-of-experiment methods are utilized to improve the tractability of numerically intensive design problems in reliable electronic packaging and fractional factorial parametric studies, commonly used by experimentalists to economize on resources, are shown to provide similar benefits in design simulations.

Journal ArticleDOI
TL;DR: In this article, a two-node beam element is attempted to solve the double superposition problem in the transverse shear, where the global inplane displacement is enriched by local displacements restricted to each individual ply.

Journal ArticleDOI
TL;DR: In this paper, an application of fuzzy sets, in conjunction with finite elements, to the transient analysis of a precision-deployable space structure is presented, where structural members are modeled by using beam finite elements and the structure's latch joint is modeled by a spring-damper-Coulomb friction element.

Journal ArticleDOI
Kyung W. Lee1, Youn Young Earmme1
TL;DR: In this paper, the energy release rate of thin quad flat packages (TQFPs) was analyzed for the evaluation of G, based on the interfacial fracture mechanics, and the effect of various geometric dimensions on the popcorn cracking during vapor phase soldering (VPS) was investigated.

Journal ArticleDOI
TL;DR: In this paper, a model of stress singularity is proposed and applications of the model for the characterization of interfaces are subsequently presented, such as integrated circuit (IC) device interfaces and plastic package interfaces.

Journal ArticleDOI
TL;DR: In this paper, a hybrid strain-based flat triangular laminated composite shell finite element is proposed for the prediction of geometrically large nonlinear responses of composite shell structures under transient excitations.

Journal ArticleDOI
TL;DR: In this paper, the singularity of rotation about the normal to a shell's surface is shown to be defective and a new method is described in which a unique normal is constructed at each node and automatically constrained.

Journal ArticleDOI
TL;DR: The reasoning strategy and reasoning in the GMMFEM system to perform the automatical communication via FEMM are presented and an approach called model-based reasoning, is clarified and four features or ingredients of this approach are concluded.

Journal ArticleDOI
TL;DR: In this article, thermal stress analyses using internal state variable (ISV) models of metallic constituents of PTHs are conducted using the finite element code ABAQUS (1996).

Journal ArticleDOI
TL;DR: In this paper, the stiffness matrices of these elements are obtained explicitly by using symbolic computer algebra packages, MAPLE and MACSYMA, and therefore, no numerical inversion of matrices and numerical integration are necessary during the derivation.

Journal ArticleDOI
TL;DR: This paper deals with the optimization of 2D finite element shapes using the very promising methods based on genetic algorithms using classical genetic operators such as crossover, mutation and reproduction for the optimization process.


Journal ArticleDOI
TL;DR: In this article, a convergence and performance study of finite-infinite element discretizations for the Helmholtz equation in exterior domains of arbitrary shape was performed, and the proposed approximation applies to arbitrary geometries, combining an hp-FE discretization between the object and a surrounding sphere and an hp infinite element (IE) discretisation outside the sphere with a spectral-like representation.

Journal ArticleDOI
TL;DR: In this paper, the finite element analysis of moisture absorption and residual stresses in plastic encapsulated IC packages is presented, and the effects of temperature and humidity conditions on moisture distributions in TSOP packages are investigated in order to assess product reliability.

Journal ArticleDOI
TL;DR: In this article, the authors describe the development of representative process models of the reflow soldering of printed circuit assemblies (PCAs) and outline some of the more important parameters to consider.

Journal ArticleDOI
TL;DR: A library of small test models should be created in order to evaluate modeling techniques and code features and determine limitations of the techniques and features that may cause modeling errors when applied to larger systems.

Journal ArticleDOI
TL;DR: In this paper, a bibliography contains references to papers, conference proceedings and these/dissertations dealing with finite and b = oundary element analysis of bridges, roads and pavements that were published in 1994-1997.