61 Result(s)
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Article
S.N. Atluri
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Article
The Elastic-Plastic Finite Element Alternating Method (EPFEAM) and the prediction of fracture under WFD conditions in aircraft structures
This report provides a summary of the Elastic- Plastic Finite Element Alternating Method (EPFEAM), the T *-integral fracture mechanics parameter, and the use of both the tools to predict the residual strength of...
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Article
The Elastic-Plastic Finite Element Alternating Method (EPFEAM) and the prediction of fracture under WFD conditions in aircraft structures
This report provides a summary of the Elastic-Plastic Finite Element Alternating Method (EPFEAM), the T* -integral fracture mechanics parameter, and the use of both tools to predict the residual strength of airc...
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Article
The Elastic-Plastic Finite Element Alternating Method (EPFEAM) and the prediction of fracture under WFD conditions in aircraft structures
This report provides a summary of the Elastic-Plastic Finite Element Alternating Method (EPFEAM), the T* -integral fracture mechanics parameter, and the use of both tools to predict the residual strength of a...
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Article
A computational model for analysing interactive buckling and delamination growth in composite structures
In this paper, a unified method is presented: (i) to model delaminated stiffened laminated composite shells; (ii) for synthesising accurate multiple post-buckling solution paths under compressive loading; and ...
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Prediction of post-buckling strength of stiffened laminated composite panels based on the criterion of mixed-mode stress intensity factors
An analytical investigation is conducted to predict the post-buckling strength of laminated composite stiffened panels under compressive loads. When a stiffened composite panel buckles, the skin would deform i...
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Article
Near-tip fields and intensity factors for interfacial cracks in dissimilar anisotropic piezoelectric media
A complete form of stress and electric displacement fields in the vicinity of the tip of an interfacial crack, between two dissimilar anisotropic piezoelectric media, is derived by using the complex function t...
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Finite element calculation of stress intensity factors for interfacial crack using virtual crack closure integral
This paper presents a successful implementation of the virtual crack closure integral method to calculate the stress intensity factors of an interfacial crack. The present method would compute the mixed-mode s...
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Article
Development of new spatially curved frame finite element for crash analysis part 1: Formulation and validation
This paper deals with the development of a new space curved frame finite element to be used for crash analysis (non-linear). The formulation has been validated for problems of large deflection and rotation, an...
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An implementation of the Schwartz-Neumann Alternating Method for collinear multiple cracks with mixed type of boundary conditions
This paper presents an implementation of the Schwartz-Neumann Alternating Method for multiple collinear cracks with mixed types of boundary conditions. Numerical examples are also presented to show the effecti...
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Residual strength prediction for aircraft panels with Multiple Site Damage, using the “EPFEAM” for stable crack growth analysis
In this paper, a new analytical method for solving stable crack propagation problems in a ductile panel with a row of cracks, is presented. The main purpose of the present study is to estimate the maximum load...
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Strength reduction and delamination growth in thin and thick composite plates under compressive loading
In this paper, the coupled local-global buckling behavior in laminated composite plates with elliptic delaminations and the associated mechanisms of delamination growth under compressive loads are critically e...
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An elastic-plastic finite element alternating method for analyzing wide-spread fatigue damage in aircraft structures
In this paper, a new analytical technique to study the effect of wide-spread fatigue damage in ductile panels is presented. The main purpose of the study is to develop an efficient methodology to predict the m...
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Article
Dependence of stress on elastic constants in an anisotropic bimaterial under plane deformation; and the interfacial crack
Nondimensional parameters that are needed to describe the stress field in an anisotropic bimaterial with tractions prescribed on its boundary are investigated. Two real matrices, which play an important role i...
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Analysis of edge stresses in composite laminates under combined thermo-mechanical loading, using a complementary energy approach
An approximate method is presented to investigate the interlaminar stresses near the free edges of composite laminate plates that are subjected to a combined thermo-mechanical loading. The method is based upon...
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Article
Calculation of stress intensity factors for an interfacial crack between dissimilar anisotropic media, using a hybrid element method and the mutual integral
Using Beom and Atluri's complete eigen-function solutions for stresses and displacements near the tip of an interfacial crack between dissimilar anisotropic media, a hybrid crack tip finite-element is develope...
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Article
Rotations in computational solid mechanics
A survey of variational principles, which form the basis for computational methods in both continuum mechanics and multi-rigid body dynamics is presented: all of them have the distinguishing feature of making ...
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Article
Energy-release-rate evaluation for delamination growth prediction in a multi-plate model of a laminate composite
In this paper, numerical methods for the evaluation of the energy-release-rate along a delamination periphery under conditions of local buckling of the delaminate, as well as global buckling of the entire lami...
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An analysis of an explicit algorithm and the radial return algorithm, and a proposed modification, in finite plasticity
This paper presents an analysis of Nemat-Nasser's (1991) explicit algorithm and a radial return algorithm for isotropic Von Mises materials undergoing large deformations. It is found that the final-radial retu...
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Analysis of strain localization in strain-softening hyperelastic materials, using assumed stress hybrid elements
Newly developed assumed stress finite elements, based on a mixed variational principle which includes unsymmetric stress, rotation (drilling degrees of freedom), pressure, and displacement as variables, are pr...
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A methodology for computing nonlinear fracture parameters for a bulging crack in a pressurised aircraft fuselage
A computational methodology for obtaining nonlinear fracture parameters which account for the effects of plasticity at the tips of a bulging crack in a pressurised aircraft fuselage is developed. The methodolo...
