Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Svetozara I. Petrova"'
Publikováno v:
Acta Physica Polonica A. 137:976-978
We analyze the classical phase diagram of a mixed-spin Heisenberg system defined on a kagome strip which is a cutout from the kagome lattice. The unit cell of the spin model contains a pair of corner-sharing triangles with four sigma spins on the out
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7c8d7cd3bdc6be1c1ab9a40d043ad41
https://doi.org/10.12693/aphyspola.137.976
https://doi.org/10.12693/aphyspola.137.976
The promotion of collinear classical spin configurations as well as the enhanced tendency towards nearest-neighbor clustering of the quantum spins are typical features of the frustrating isotropic three-body exchange interactions in Heisenberg spin s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d93b6952bfb060a68a48d68f9d9c405
https://pub.uni-bielefeld.de/record/2907041
https://pub.uni-bielefeld.de/record/2907041
Publikováno v:
Computational Methods in Applied Mathematics. 10:69-86
The paper deals with the numerical computation of a crack problem posed on microstructural heterogeneous materials containing multiple phases in the microstructure. The failure of such materials is a natural multi-scale effect since cracks typically
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a63876dce3aff3b3f412022142daa704
https://doi.org/10.2478/cmam-2010-0003
https://doi.org/10.2478/cmam-2010-0003
Autor:
Svetozara I. Petrova
Publikováno v:
Mathematics and Computers in Simulation. 80:581-597
The paper deals with applications of numerical methods for optimal shape design of composite materials structures and devices. We consider two different physical models described by specific partial differential equations (PDEs) for real-life problem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::add5734d926199251185aaeaeeb3e194
https://doi.org/10.1016/j.matcom.2009.09.010
https://doi.org/10.1016/j.matcom.2009.09.010
Publikováno v:
Optimization Methods and Software. 24:205-218
We are concerned with optimal shape design of composite materials with periodic microstructures. The homogenization approach is applied to obtain a computationally feasible macromodel. The microstructural geometrical details of the microcells (such a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::04ac7517da69cd2d7847d77862566ce2
https://doi.org/10.1080/10556780902753007
https://doi.org/10.1080/10556780902753007
Publikováno v:
Mathematics and Computers in Simulation. 74:468-480
The paper deals with a structural optimization of composite materials with periodic microstructures invoking an elasto-plasticity model with the von Mises yield criterion. Closest-point return mapping algorithms within the incremental finite element
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dbdaff1f30effd4ab844f1fda4581c73
https://doi.org/10.1016/j.matcom.2006.07.002
https://doi.org/10.1016/j.matcom.2006.07.002
Publikováno v:
Computing and Visualization in Science. 9:71-87
We consider the numerical solution of optimization problems for systems of partial differential equations with constraints on the state and design variables as they arise in the optimal design of the shape and the topology of continuum mechanical str
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5a30b9bcbb46683c06974c2a427bedeb
https://doi.org/10.1007/s00791-006-0018-9
https://doi.org/10.1007/s00791-006-0018-9
Publikováno v:
Journal of Computational Methods in Sciences and Engineering. 4:87-96
A structural optimization method based on the homogenization approach (the homogenization design method) has been applied to the modeling of the recently produced biomorphic composite materials. The design itself involves a structural optimization pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11175f659e3793086f32715779152c04
https://doi.org/10.3233/jcm-2004-41-211
https://doi.org/10.3233/jcm-2004-41-211
Publikováno v:
Journal of Optimization Theory and Applications. 114:545-571
We consider the problem of minimization of energy dissipation in a conductive electromagnetic medium with a fixed geometry and a priori given lower and upper bounds for the conductivity. The nonlinear optimization problem is analyzed by using the pri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::46ac839b73f8a223f780a43d9e84a6c0
https://doi.org/10.1023/a:1016070928600
https://doi.org/10.1023/a:1016070928600
Autor:
Svetozara I. Petrova
Publikováno v:
Parallel Computing. 23:1113-1128
A fast elliptic solver for separable elliptic equations on rectangular domains is considered. The method is referred to as FASV (fast algorithm for separation of variables) and is based on the odd-even block elimination technique in combination with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70a859b985624f95899596050a0851db
https://doi.org/10.1016/s0167-8191(97)00046-x
https://doi.org/10.1016/s0167-8191(97)00046-x