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- G. P. Nikishkov
- 2004

- G. P. NIKISHKOV
- 1987

In this paper, an equivalent domain integral (EDI) method and the attendant numerical algorithms arc presented for the computation of a near-crack-tip field parameter, the vector Jε-integral, and its variation along the front of an arbitrary three-dimensional crack in a structural component. Account is taken of possible non-elastic strains present in the… (More)

- G. P. Nikishkov
- 2006

A closed-form solution for multilayer structures with initial strains under generalized plane strain conditions is presented. Such solutions can be useful for estimating the curvature radius and strains or stresses for self-positioning microand nano-structures with lattice mismatched layers. Comparison with finite element results shows that the developed… (More)

- G P Nikishkov, Yu G Nikishkov, V V Savchenko
- 2002

The Java programming language has several features, which makes it attractive for software development in computational engineering and sciences. One major obstacle to use of Java in computationally intensive applications is its reputation of a slow language in comparison to Fortran or C. In this paper the performance of the developed Java finite element… (More)

- G. P. Nikishkov
- 2003

Closed-form estimate of curvature for hinged multilayer structures with initial strains is developed. The finite element method is used for modeling of self-positioning microstructures. The geometrically nonlinear problem with large rotations and large displacements is solved using step procedure with node coordinate update. Finite element results for… (More)

- G P Nikishkov
- 2006

This paper presents the object oriented approach to programming the finite element method using the Java language. The developed finite element code consists of ten Java packages. Three main methods are related to generation of finite element models, solution of elastic and elastic-plastic boundary value problems, and visualization of models and solution… (More)

- G P Nikishkov
- 2003

Abstract An efficient technique to visualize primary and secondary results for combined FEM/BEM models as contours is presented. The technique is based on dividing higher-order surfaces into triangles and on using texture interpolation to produce contour plots. Since results of high accuracy with significant gradients can be obtained using sparse meshes of… (More)

- G. P. NIKISHKOV
- 2004

1 The performance of the developed Java finite element code is compared to that of the C finite element code on the solution of three-dimensional elasticity problems using Intel Pentium 4 computer. Untuned Java code is approximately two times slower then analogous C code. It is shown that code tuning with the use of blocking technique can provide Java/C… (More)

- Ed F Magoules, G P Nikishkov
- 2008

An introduction to the domain decomposition method for parallel finite element analysis is presented. The domain decomposition method allows decomposition of largesize problem solutions to solutions of several smaller size problems. Algorithms of domain partitioning with compute load balancing as well as direct and iterative solution techniques are… (More)

- G P Nikishkov, S N Atluri
- 1993

This paper presents a detailed description of the computer implementation of a generalized midpoint algorithm for integration of constitutive relations for von Mises’ hardening material. A nonlinear scalar equation for determination of the plastic multiplier is derived. The solution of this equation for a hardening material, by the Newton-Raphson method,… (More)