Partner: Janina Ostrowska-Maciejewska


Recent publications
1.Ostrowska-Maciejewska J., Szeptyński P., Pęcherski R.B., Mathematical foundations of limit criterion for anisotropic materials, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, DOI: 10.2478/amm-2013-0155, Vol.58, No.4, pp.1223-1235, 2013
Abstract:

In the paper a new proposition of limit state criteria for anisotropic solids exhibiting different strengths at tension and compression is presented. The proposition is based on the concept of energetically orthogonal decompositions of stress state introduced by Rychlewski. The concept of stress state dependent parameters describing the influence of certain stress modes on the total measure of material effort was firstly presented by Burzynski. The both concepts are reviewed in the paper. General formulation of a new limit criterion as well as its specification for certain elastic symmetries is given. It is compared with some of the other known limit criteria for anisotropic solids. General methodology of acquiring necessary data for the criterion specification is presented. The ideas of energetic and limit state orthogonality are discussed - their application in representation of the quadratic forms of energy and limit state criterion as a sum of square terms is shown

Keywords:

anisotropy, strength hypothesis, material effort, yield condition, plastic potential, strength differential effect, elasticity, plasticity

Affiliations:
Ostrowska-Maciejewska J.-IPPT PAN
Szeptyński P.-other affiliation
Pęcherski R.B.-IPPT PAN
2.Ostrowska-Maciejewska J., Pęcherski R.B., Szeptyński P., Limit Condition for Anisotropic Materials with Asymmetric Elastic Range, ENGINEERING TRANSACTIONS (ROZPRAWY INŻYNIERSKIE), ISSN: 0867-888X, Vol.60, No.2, pp.125-138, 2012
Abstract:

In the paper a new proposition of an energy-based hypothesis of material effort is introduced. It is based on the concept of influence functions introduced by Burzyński [3] and on the concept of decomposition of elastic energy density introduced by Rychlewski [18]. A new proposition enables description of a wide class of linearly elastic materials of arbitrary symmetry exhibiting strength differential effect.

Keywords:

linear elasticity, anisotropy, material effort hypotheses, limit state criteria

Affiliations:
Ostrowska-Maciejewska J.-other affiliation
Pęcherski R.B.-IPPT PAN
Szeptyński P.-other affiliation
3.Nowak M., Ostrowska-Maciejewska J., Pęcherski R.B., Szeptyński P., Yield criterion accounting for the third invariant of stress tensor deviator. Part I. Proposition of the yield criterion based on the concept of influence functions, ENGINEERING TRANSACTIONS (ROZPRAWY INŻYNIERSKIE), ISSN: 0867-888X, Vol.59, No.4, pp.273-281, 2011
Abstract:

In the paper a new proposition of an energy-based hypothesis of material effort is introduced. It is based on the concept of influence functions introduced by Burzyński [3] and on the concept of decomposition of elastic energy density introduced by Rychlewski [18]. A new proposition enables description of a wide class of linearly elastic materials of arbitrary symmetry exhibiting strength differential effect.

Keywords:

linear elasticity, anisotropy, material effort hypotheses, limit state criteria

Affiliations:
Nowak M.-IPPT PAN
Ostrowska-Maciejewska J.-other affiliation
Pęcherski R.B.-IPPT PAN
Szeptyński P.-other affiliation
4.Kowalczyk-Gajewska K., Ostrowska-Maciejewska J., Review on spectral decomposition of Hooke's tensor for all symmetry groups of linear elastic materials, ENGINEERING TRANSACTIONS (ROZPRAWY INŻYNIERSKIE), ISSN: 0867-888X, Vol.57, pp.145-183, 2009
Abstract:

The spectral decomposition of elasticity tensor for all symmetry groups of a linearly elastic material is reviewed. In the paper it has been derived in non-standard way by imposing the symmetry conditions upon the orthogonal projectors instead of the stiffness tensor itself. The numbers of independent Kelvin moduli and stiffness distributors are provided. The corresponding representation of the elasticity tensor is specified

Keywords:

linear elasticity, anisotropy, symmetry group, spectral decomposition

Affiliations:
Kowalczyk-Gajewska K.-IPPT PAN
Ostrowska-Maciejewska J.-other affiliation
5.Kowalczyk-Gajewska K., Ostrowska-Maciejewska J., Energy-based limit criteria for anisotropic elastic materials with constraints, ARCHIVES OF MECHANICS, ISSN: 0373-2029, Vol.57, pp.133-155, 2005
6.Kowalczyk-Gajewska K., Gambin W., Pęcherski R.B., Ostrowska-Maciejewska J., Modelling of crystallographic texture development in metals accounting for micro-shearbands, ARCHIVES OF METALLURGY AND MATERIALS, ISSN: 1733-3490, Vol.50, No.3, pp.575-593, 2005
Abstract:

The rigid-plastic model for the single grain is developed in which the velocity gradient is split into two parts connected with crystallographic slip and micro-shear bands respectively. For crystallographic slip the regularized Schmid law proposed by Gambin is used. For the micro-shear bands the model developed by Pęcherski, which accounts for the contribution of this mechanism in the rate of plastic deformation by means of a function fms is applied. Different constitutive equations for the plastic spin due to two considered mechanisms of plastic deformation are used. The present model is applied to simulate crystallographic texture evolution in the polycrystalline element.

Keywords:

crystallographic texture, modelling of texture, micro-shear bands, regularized Schnid law, plastic spin

Affiliations:
Kowalczyk-Gajewska K.-IPPT PAN
Gambin W.-IPPT PAN
Pęcherski R.B.-IPPT PAN
Ostrowska-Maciejewska J.-other affiliation
7.Ostrowska-Maciejewska J., Analiza statyczna tarczy sprężystej z otworem prostokątnym metodą elementów skończonych, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.60, pp.1-59, 1976
8.Ostrowska-Maciejewska J., Bauer J., Kotowski Romuald, Dyskretyzacja tarczy prostokątnej metodą elementów skończonych, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.70, pp.1-44, 1975
9.Lenart J., Ostrowska-Maciejewska J., O rozwiązaniu problemów brzegowych Cauchy`ego i na na obwiedni charakterystyk w płaskim stanie naprężenia, Prace IPPT - IFTR Reports, ISSN: 2299-3657, No.26, pp.1-29, 1974

List of recent monographs
1.
314
Ostrowska-Maciejewska J., Kowalczyk-Gajewska K., Rachunek tensorowy w mechanice ośrodków ciągłych, Biblioteka Mechaniki Stosowanej. Seria A: Monografie, Instytut Podstawowych Problemów Techniki PAN, pp.1-397, 2013
2.
86
Ostrowska-Maciejewska J., Pęcherski R.B., Anizotropia sprężysta i wytężenie cienkich warstw i powłok, IMIM PAN (Kraków), IPPT PAN (Warszawa), pp.1-173, 2006

Conference abstracts
1.Ostrowska-Maciejewska J., Pęcherski R., Szeptyński P., Matematyczne podstawy warunku granicznego dla materiałów anizotropowych, PLASMET/2012, VIII Seminarium Naukowe Zintegrowane Studia Podstaw Deformacji Plastycznej Metali, 2012-11-20/11-23, Łańcut (PL), pp.1-3, 2012
2.Szeptyński P., Ostrowska-Maciejewska J., Pęcherski R.B., Extension of The Rychlewski Limit State Criterion Accounting For The Asymmetry of Elastic Range, SolMech 2012, 38th Solid Mechanics Conference, 2012-08-27/08-31, Warszawa (PL), pp.106-107, 2012