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prof. Tomasz Lewiński ponownie na liście "Stanford Top 2% world scientists" PDF Drukuj Email
W zestawieniu World’s TOP 2% Scientists 2021  prof. Tomasz Lewiński znalazł się jako jedyny pracownik naszego wydziału.

Ranking TOP 2% opracowano na podstawie dorobku naukowego poszczególnych badaczy według indeksu bibliometrycznego. Kryteriami oceny były indeks Hirscha, liczba cytowań (z uwzględnieniem autocytowań), Impact Factor oraz miejsce i rola na liście autorów.

Informacja na stronie Politechniki Warszawskiej>>.
 
T. LEWIŃSKI, On Cherkaev–Lurie–Milton theorem in the plane problems of linear elasticity PDF Drukuj Email
T. Lewiński, On Cherkaev–Lurie–Milton theorem in the plane problems of linear elasticity, Arch. Mech. 74 (4), 319–339, 2022,
DOI: 10.24423/aom.4083

Abstract
The paper delivers a full justification of the Cherkaev–Lurie–Milton theorem in application to the elasticity problem of in-plane loaded plates, 2D periodic
elastic composites, elasticity of thin plates subjected to transverse loads as well as in-plane periodic thin plates in bending. The theorem is treated as natural extension
of Michell’s result on 2D elasticity and the Gauss–Bonnet formula applied to the deflection surface of a thin plate subject to bending.
 
Corrigendum to the book Michell Structures PDF Drukuj Email
Corrigendum to the book:
Tomasz Lewiński, Tomasz Sokół, Cezary Graczykowski, Michell Structures, Springer International Publishing AG, Cham, Switzerland 2019, 569 pp.
https://link.springer.com/book/10.1007/978-3-319-95180-5
pdfCorrigendum pdf>>
 
Enhanced growth method for topology and geometry optimization of truss structures PDF Drukuj Email
Kozłowski, G., Sokół, T. Enhanced growth method for topology and geometry optimization of truss structures. Struct Multidisc Optim 65, 220 (2022).
https://doi.org/10.1007/s00158-022-03317-7

Abstract
In this paper, we present an enhanced growth method based on virtual displacements and strains fields for generating optimal design in terms of topology and geometry of plane trusses without the need of a generation of so-called ground structure. The method has been applied to the single load case problem with stress and size constraints in plastic design. In order to demonstrate the reliability and accuracy of the proposed method, three examples are carried out: Hemp cantilever, Chan cantilever and McConnel structure.
 
Setting the Free Material Design problem through the methods of optimal mass distribution PDF Drukuj Email
Bołbotowski, K., Lewiński, T. Setting the Free Material Design problem through the methods of optimal mass distribution. Calc. Var. 61, 76 (2022).
https://doi.org/10.1007/s00526-022-02186-8

Abstract
The paper deals with the Free Material Design (FMD) problem aimed at constructing the least compliant structures from an elastic material, the constitutive field of which plays the role of design variable in the form of a tensor valued measure λ supported in the design domain. (...)
 
Optimal design of archgrids: the second-order cone programming perspective PDF Drukuj Email
Grzegorz Dzierzanowski, Krzysztof Hetmanski, Optimal design of archgrids: the second-order cone programming perspective, Archives of Civil Engineering, 2021, 67(4), pp. 469-486,

on-line>>
Abstract
This paper regards the minimum weight problem of spatial systems, known in the literature as Rozvany–Prager archgrids. Their architectural role is to transmit a load of fixed intensity to the line of supports located at the boundary of a given plane domain. The system consists of arches spaced apart from one another, hence the mechanics of such a system is that of a gridwork shell and not a shell continuum.
Mathematically, description of an archgrid falls into the class of Michell frames. (...)
 
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