MNiSW Points:
2019  100  MNiSW 2019 
Year  Points  List 

2019  100  MNiSW 2019 
2017  30  A 
2016  25  A 
2015  30  A 
2014  25  A 
2013  30  A 
2011  20  A 
2008  32  A 
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2019

A continual model of a damaged medium used for analyzing fatigue life of polycrystalline structural alloys under thermal–mechanical loading
PublicationThe main physical laws of thermal–plastic deformation and fatigue damage accumulation processes in polycrystalline structural alloys under various regimes of cyclic thermal–mechanical loading are considered. Within the framework of mechanics of damaged media, a mathematical model is developed that describes thermal–plastic deformation and fatigue damage accumulation processes under lowcycle loading. The model consists of three...

Nonlinear finite element modeling of vibration control of plane rodtype structural members with integrated piezoelectric patches
PublicationThis paper addresses modeling and finite element analysis of the transient largeamplitude vibration response of thin rodtype structures (e.g., plane curved beams, arches, ring shells) and its control by integrated piezoelectric layers. A geometrically nonlinear finite beam element for the analysis of piezolaminated structures is developed that is based on the Bernoulli hypothesis and the assumptions of small strains and finite...

On existence and uniqueness of weak solutions for linear pantographic beam lattices models
PublicationIn this paper, we discuss wellposedness of the boundaryvalue problems arising in some “gradientincomplete” straingradient elasticity models, which appear in the study of homogenized models for a large class ofmetamaterials whosemicrostructures can be regarded as beam lattices constrained with internal pivots. We use the attribute “gradientincomplete” straingradient elasticity for a model in which the considered strain energy...

On the correspondence between two and threedimensional Eshelby tensors
PublicationWe consider both threedimensional (3D) and twodimensional (2D) Eshelby tensors known also as energy–momentum tensors or chemical potential tensors, which are introduced within the nonlinear elasticity and the resultant nonlinear shell theory, respectively. We demonstrate that 2D Eshelby tensor is introduced earlier directly using 2D constitutive equations of nonlinear shells and can be derived also using the throughthethickness...

Robust fournode elements based on Hu–Washizu principle for nonlinear analysis of Cosserat shells
PublicationMixed 4node shell elements with the drilling rotation and Cosserattype strain measures based onthe threefield Hu–Washizu principle are proposed. In the formulation, apart from displacement and rotationfields, both strain and stress resultant fields are treated as independent. The elements are derived in the framework of a general nonlinear 6parameter shell theory dedicated to the analysis of multifold irregular shells.The...

Structural response of existing spatial truss roof construction based on Cosserat rod theory
PublicationPaper presents the application of the Cosserat rod theory and newly developed associated finite elements code as the tools that support in the expertdesigning engineering practice. Mechanical principles of the 3D spatially curved rods, dynamics (statics) laws, principle of virtual work are discussed. Corresponding FEM approach with interpolation and accumulation techniques of state variables are shown that enable the formulation...
2018

Local buckling of composite channel columns
PublicationThe investigation concerns local buckling of compressed flanges of axially compressed composite channel columns. Cooperation of the member flange and web is taken into account here. The buckling mode of the member flange is defined by rotation angle a flange about the line of its connection with the web. The channel column under investigation is made of unidirectional fibrereinforced laminate. Two approaches to member orthotropic...

Pantographic metamaterials: an example of mathematically driven design and of its technological challenges
PublicationIn this paper, we account for the research efforts that have been started, for some among us, already since 2003, and aimed to the design of a class of exotic architectured, optimized (meta) materials. At the first stage of these efforts, as it often happens, the research was based on the results of mathematical investigations. The problem to be solved was stated as follows: determine the material (micro)structure governed by those...

Selected local stability problems of channel section flanges made of aluminium alloys
PublicationThe paper addresses the issue of local buckling of compressed flanges of coldformed thinwalled channel columns and beams with nonstandard flanges composed of aluminium alloys. The material behaviour follows the Ramberg–Osgood law. It should be noted that the proposed solution may be also applied for other materials, for example: stainless steel, carbon steel. The paper is motivated by an increasing interest in nonstandard coldformed...

Virtual spring damper method for nonholonomic robotic swarm selforganization and leader following
PublicationIn this paper, we demonstrate a method for selforganization and leader following of nonholonomic robotic swarm based on spring damper mesh. By selforganization of swarm robots we mean the emergence of order in a swarm as the result of interactions among the single robots. In other words the selforganization of swarm robots mimics some natural behavior of social animals like ants among others. The dynamics of twowheel robot...
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