Showing papers in "Finite Elements in Analysis and Design in 1988"

TL;DR: In this article, it was shown that the semianalytical method can have serious accuracy problems for shape design variables in structures modeled by beam elements. And the problem is associated with a high ratio of rigid body rotation to elastic deformation.

TL;DR: The structure to a geometry-based finite element preprocessing system is presented that can support the finite element modeling (FEM) procedures used today as well as the fully automated procedures under development.

TL;DR: In this article, the shape or distortion parameters for an eight-node quadrilateral with curved boundaries can be expressed in terms of the coefficients of the element's shape polynomials.

TL;DR: In this paper, a family of hyperelastic finite elements capable of modeling arbitrarily large strains for axisymmetric and plane strain analyses has been developed, and the OSE law is defined in terms of the three principal components of stretch.

TL;DR: In this paper, an analytical and finite element study on nonlinear contact dynamics and controls is presented, where nonlinear dynamic contacts between eccentrically supported masses and simply supported beams are studied and passive control of the dynamic contacts using viscoelastic dampers is also proposed and evaluated.

TL;DR: In this article, the authors focus on the effort to simulate turbine blade casting using commercially available software and compare experimental and analytical results for simple geometries, and propose a novel solution to the radiation boundary condition problem.

TL;DR: In this article, the authors present examples for analytical treatment of various levels of packaging structures for thermal stress and fatigue, handling, shock and vibration, and adhesion must be adequate to insure composite action.

TL;DR: In this article, a method is developed for determining the mass and the nonlinear stiffness and damping characteristics of structures subjected to crash-loading environments using adaptive time domain, constrained minimization techniques.

TL;DR: This paper presents a new approach: the time of rezoning is automatically determined, and only local regions are rezoned when necessary, and the new mesh is generated by automatic triangulation.

TL;DR: In this article, a numerical technique called moving finite element analysis is developed to tackle the indentation of elastic beams whose closed-form solutions exist, where the governing equation with Lagrange multipliers embedded, derived from the variational principles, is now subjected to the constraint equations and the interface equation.

TL;DR: The boundary integral equation (BIE) method as mentioned in this paper is a well-conditioned integral equation method for stiffness matrix formulation with no singular kernels, strong or weak kernels, and computationally, no local element approximations are needed.

TL;DR: A dynamic data structure and its implementation, used for an optimum mesh generator, which takes advantage of the Delaunay algorithm, which maximizes the summation of the smallest angles in all triangles and thus creates a mesh that is proved to be an optimumMesh for use in the finite element method.

TL;DR: Specific areas addressed include the philosophical differences in software requirements between Von Neumann and parallel computers, the anticipated benefits of concurrency in FEM, performance metrics required to evaluate those benefits, and the computational requirements of FEM itself.

TL;DR: The SAIC team has been responsible for the major part of the technology development and implementation as well as the coordination of the total technology effort which has resulted in the design and building of four new 12-meter yachts, all of which are named STARS & STRIPES.

TL;DR: In this article, the holographic interferometry enables three-dimensional measurements of displacement fields, and the evaluated deformations and displacements can be used for Finite Element Method calculations.

TL;DR: In this paper, an improved stiffness derivative method is suggested for use in fracture mechanics applications, and the relative effectiveness of the three methods is studied by means of test cases, where the stiffness is used to estimate the peak stress in the vicinity of a stress raiser.

TL;DR: In this paper, the historical development of techniques for measuring three velocity components using laser velocimetry is presented and their relative merits are described and their explanations for these inaccuracies along with simulation results.

TL;DR: In this paper, a comparative study of three different steel design codes, each with a unique philosophy in their approach to the design of structural members, is presented, along with a brief description of the major aspects of the design codes along with examples of how the differences affect the typical structures.

TL;DR: In this article, a finite element method for solving a tissue problem in a semi-infinite strip with a singularity at the origin is presented, and an analytic form of the solution is derived and this is used for comparing with the finite element solution obtained in the semi-inverse strip using novel infinite elements.

TL;DR: In this paper, a technique is presented for combining laser-based speckle metrology and the Finite Element Method to determine the state of stress in the vicinity of a crack tip in a planar structure.