61 Result(s)
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S.N. Atluri
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A finite element analysis for the temperature field produced by a moving heat source
Using moving mesh finite element method we discuss the temperature field produced by a moving heat source with the variable thermal conductivity and with the radioative and convective boundary conditions in a ...
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Large-deformation, elasto-plastic analysis of frames under nonconservative loading, using explicitly derived tangent stiffnesses based on assumed stresses
Simple and economical procedures for large-deformation elasto-plastic analysis of frames, whose members can be characterized as beams, are presented. An assumed stress approach is employed to derive the tangen...
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Abstracts of Interest
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On a consistent theory, and variational formulation of finitely stretched and rotated 3-D space-curved beams
This paper deals with finite rotations, and finite strains of three-dimensional space-curved elastic beams, under the action of conservative as well as nonconservative type external distributed forces and mome...
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Computational studies on path independent integrals for non-linear dynamic crack problems
Recently the authors have derived various new types of path independent integrals in which the theoretical limitations of the so-calledJ integral are overcome. First, for elastodynamic crack problems, a path inde...
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Non-hyper-singular integral-representations for velocity (displacement) gradients in elastic/plastic solids (small or finite deformations)
Integral representations for deformation (velocity) gradients in elastic or elastic-plastic solids undergoing small or large deformations are presented. Compared to the cases wherein direct differentiation of ...
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On the formulation of variational theorems involving volume constraints
A continued concern with variational theorems which are suitable for numerical implementation in connection with the analysis of incompressible or nearly incompressible materials has led us to the formulation ...
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Variational approaches for dynamics and time-finite-elements: numerical studies
This paper presents general variational formulations for dynamical problems, which are easily implemented numerically. The development presents the relationship between the very general weak formulation arisin...
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A new approach to determine weight functions from Bueckner's fundamental field by the superposition technique
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On the evaluation of hyper-singular integrals arising in the boundary element method for linear elasticity
The boundary element method (BEM) for linear elasticity in its curent usage is based on the boundary integral equation for displacements. The stress field in the interior of the body is computed by differentiatin...
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Response: Discussion of “a new approach to determine weight functions from bueckner's fundamental field by the superposition technique,” by M.H. Aliabadi and D.P. Rooke
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Primal and mixed forms of Hamiltons's principle for constrained rigid body systems: numerical studies
Constraint equations arise in the dynamics of mechanical systems whenever there is the need to restrict kinematically possible motions of the system. In practical applications, constraint equations can be used...
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Analysis of cracks in aging aircraft structures, with and without composite-patch repairs
In this paper, the problems of composite-patch repair of (i) center and edge-cracked panels loaded in the far-field; and (ii) cracks emanating from pin-loaded fastener holes, are examined in thorough detail. T...
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Formulation of a membrane finite element with drilling degrees of freedom
A 4-noded membrane element with drilling degrees of freedom is developed. A functional for the linear problem, in which the drilling rotations are introduced as independent variables, is obtained from the func...
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Postbuckling analysis of stiffened laminated composite panels, using a higher-order shear deformation theory
The investigation aims at: (i) constructing a modified higher-order shear deformation theory in which Kirchhoff's hypotheses are relaxed, to allow for shear deformations; (ii) validating the present 5-paramete...
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Nonsingular toughening and R-curve behavior in nominally pure alumina
Moire interferometry is employed to study toughening in medium to large grain size nominally pure alumina. The fracture scale length, which is characterized by the grain size of the alumina, is systematically ...
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Four-noded mixed finite elements, using unsymmetric stresses, for linear analysis of membranes
A family of new 4-noded membrane elements with drilling degrees of freedom and unsymmetric assumed stresses is presented; it is derived from a mixed variational principle originally formulated for finite strai...
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Non-linear analysis of wave propagation using transform methods
Non-linear wave propagation/transient dynamics in lattice structures is modeled using a technique which combines the Laplace transform and the Finite element method. The first step in the technique is to apply...
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Fatigue growth of multiple-cracks near a row of fastener-holes in a fuselage lap-joint
The fatigue growth of multiple cracks, of arbitrary lengths, emanating from a row of fastener holes in a bonded, riveted, lap joint in a pressurized aircraft fuselage is studied. The effects of residual stress...
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An analytical-numerical alternating method for elastic-plastic analysis of cracks
A new algorithm based on the Schwartz-Neumann alternating technique is developed for the solution of elastic-plastic fracture mechanics problems. An analytical solution for an elastic crack, with arbitrary cra...
