Showing papers in "Finite Elements in Analysis and Design in 1996"

TL;DR: In this article, a simple evolutionary procedure based on finite element analysis is proposed to minimize the weight of structures while satisfying stiffness requirements, which is capable of performing simultaneous shape and topology optimization.

TL;DR: In this article, the authors investigated the performance of finite element models analyzing a moving load on an elastic beam and showed that the model accuracy can be maintained at an acceptable level provided that the number of elements used to discretize the support structure continuum is at least two to eight times greater than the number used in static analysis.

TL;DR: In this article, a numerical procedure to determine the temperature rise in aircraft tires under free rolling conditions is presented, where energy dissipation from cyclic inelastic deformation is considered the main heat generation source.

TL;DR: In this article, the impact of six design factors on axial stiffness and axial stress rises at cable ends, as well as the middle cross-section was explored, including radius of the core wire, the radius of helical wires, the helical angle, the boundary condition, the strand length, and the contact condition between core wire and helical wire.

TL;DR: In this paper, the free-vibration response of stiffened laminated plates is studied using higher-order shear deformation theory, which assumes a realistic cross-sectional deformation pattern and eliminates the use of shear correction coefficients.

TL;DR: In this paper, the stiffness matrix of a simple rod-type model is derived from the elastic potential function, and the result is an application of the primal-dual method, or augmented Lagraange multipliers (ALM) method.

TL;DR: In this paper, the authors provide a brief exposition of the mechanical characteristics and behaviour of fabrics, a review of existing studies in this comparatively new area and a perspective of its future developments and applications in textiles and clothing CAD.

TL;DR: In this paper, a finite element analysis is used to study the impact and the containment aspects of rotor blade fragments that are produced during a aircraft jet engine rotor failure, and the analysis is performed on a ring-type containment structure and various fragment types are considered.

TL;DR: A review of the keynote papers on the p -version method is presented which focuses on the use of the hierarchical concept and the selection of the interpolation functions, and the importance of accurate geometry mapping is discussed.

TL;DR: In this paper, a modal analysis approach is extended to the vibration of thin cylindrical shells, where the longitudinal, radial, and circumferential displacements are coupled with each other, due to Poisson's ratio and the curvature of the shell.

TL;DR: In this paper, the transient response of two-dimensional composite solids which contain cracks terminating at a right angle to bimaterial interfaces is studied using the finite element method, where a new singular finite element was developed to enable the determination of the dynamic stress field and the associated dynamic stress intensity factors of the crack reliably and efficiently.

TL;DR: In this paper, an analytical crack tip element analysis is used for the determination of all singular field quantities, and a computationally efficient procedure is presented for the prediction of mixed-mode strain energy release rates in practical problems of delamination.

TL;DR: Admissible matrix formulation as mentioned in this paper is a patch test approach for efficient construction of multi-field finite element models, which employs the patch test to identify the constraints on, respectively, the flexibility and stiffness matrices which are most detrimental to the element efficiency.

TL;DR: In this paper, the authors investigated the postbuckling analysis of structures using several three-parameter constrained solution techniques, including elliptic constraint, hyperbolic constraint and second degree polynomial constraint method.

TL;DR: In this article, a detailed study of the buckling and postbuckling responses of composite panels with central circular cutouts subjected to various combinations of mechanical and thermal loads is made.

TL;DR: In this paper, a highly economical 8-node brick element consolidated from the previous work on admissible matrix formulation and selective scaling is discussed, which is modified from the Pian-Tong element in a way that the latter's good bending response, applicability in nearly incompressible materials and insusceptibility to mesh distortion are retained.

TL;DR: In this paper, the assumed strain formulation for geometrically nonlinear analysis is reexamined with particular attention to recovery of incremental strain and compatibility mismatch, and numerical tests conducted on example problems demonstrate that the conventional approach with linearized compatibility condition is superior to the alternate approach when increments in loads or displacements are large.

TL;DR: This approach adopts a very general structure originating from the weak form of the initial/boundary value problem, designed such that their instantiation discretizes the continuous problem into algebraic or differential equations.

TL;DR: In this article, a finite element model for linear static and free vibration analysis of composite cylindrical panels with composite stiffeners is presented, which uses a first-roder shear deformation theory.

TL;DR: The concept of a mechanical analysis module is introduced and located with respect to both a design model and the structural analysis solvers currently used, and the main relations established between the entitites are introduced and justified.

TL;DR: In this article, the authors considered the continuous positivity of the deflection of an isotropic elastic beam under bending conditions on a tensionless Winkler elastic foundation and showed how the quantified variable (the length variable along the finite beam element) can be eliminated and related quantifier-free formulae, including only the four arbitrary boundary conditions at the element tips, can be constructed.

TL;DR: In this paper, a transient nonlinear finite element analysis within the realm of a multi-body dynamics formulation for determining the dynamic response of a moderately thick laminated shell undergoing a rapid and large rotational motion and nonlinear elastic deformations is presented.

TL;DR: In this article, the authors presented a method to find the shortest path between two points in the Web of Science Record created on 2007-04-23, modified on 2016-08-08.

TL;DR: In this article, the ballistic limit velocity of a material versus material thickness is used to rank the relative penetration performance of aircraft structural materials. But the analysis of the ballistic penetration response is limited in the case of metal alloys and metal laminates.

TL;DR: Numerical results for a two-dimensional model problem show that significant problem size reduction can be obtained through this adaptive approach, and an algorithm is presented to compute the scaling constant, which leads to computable error estimates.

TL;DR: A framework for developing an intelligent decision system to support aircraft safety inspections is proposed that links expert systems, neural networks, as well as a paradigm of the decision making process typically used in unstructured situations.

TL;DR: In this paper, the effect of small fatigue cracks on the residual strength of aircraft sheet materials and fuselage lap joints containing major cracks is investigated, and a version of the Dugdale model is proposed which accounts for strain hardening of the sheet in an approximate way and incorporates a criterion for crack advance leading to crack growth resistance.

TL;DR: In this article, the authors describe some recent applications of the three dimensional finite element alternating method (FEAM) to analyze problems involving mechanical and thermal loads, residual stresses, bonded to composite patch repairs, and fatigue.