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Pracownicy Zakładu na SOLMECH 2016 PDF Print E-mail
T.Lewiński, K. Bołbotowski, S. Czarnecki, R. Czubacki, G. Dzierżanowski, T. Łukasiak, T. Sokół and P.Wawruch, Optimization of structural topology, (referat plenarny, wygłoszony przez pierwszego z autorów) 40th Solid Mechanics Conference, Warsaw, August 29th –September 2nd 2016. In: Z.Pęcherski, Ed.. Paper available online: http://solmech2016.ippt.pan.pl/table/abstracts.html

T.Łukasiak, Two-phase isotropic composites of extremal moduli. The inverse homogenization problem. 40th Solid Mechanics Conference, Warsaw, August 29th –September 2nd 2016. In: Z.Pęcherski, Ed.. Paper available online: http://solmech2016.ippt.pan.pl/table/abstracts.html

T.Sokoł and T.Lewiński, Solution of the three force problem in a case of two forces being mutually orthogonal, 40th Solid Mechanics Conference, Warsaw, August 29th –September 2nd 2016. In: Z.Pęcherski, Ed.. Paper available online: http://solmech2016.ippt.pan.pl/table/abstracts.html

I.Goda, J.F.Ganghoffer and T.Lewiński, Evolutionary and topology optimization based algorithms for bone external and internal remodeling., 40th Solid Mechanics Conference, Warsaw, August 29th –September 2nd 2016. In: Z.Pęcherski, Ed.. Paper available online: http://solmech2016.ippt.pan.pl/table/abstracts.html

G. Dzierżanowski, Inverse homogenization in isotropic material design, 40th Solid Mechanics Conference, Warsaw, August 29th –September 2nd 2016. In: Z.Pęcherski, Ed.. Paper available online: http://solmech2016.ippt.pan.pl/table/abstracts.html
 
XXV Polish – Russian – Slovak Seminar “Theoretical Foundation of Civil Engineering" - Procedia Engineering PDF Print E-mail
tfoce 2014Procedia Engineering, Volume 153, Pages 1-944 (2016)
XXV Polish – Russian – Slovak Seminar “Theoretical Foundation of Civil Engineering"
Edited by Heiko Kirschke

K. Fedor, I. Czmoch, Structural Analysis of Tension Tower Subjected to Exceptional Loads During Installation of Line Conductors, Pages 136-143
http://dx.doi.org/10.1016/j.proeng.2016.08.093
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Z. Kacprzyk, A Stationary Formulation of the Space-time Finite Element Method, Pages 248-255
http://dx.doi.org/10.1016/j.proeng.2016.08.110
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S. Spodzieja, I. Czmoch, Influence of Anchoring Cables Position on Load Carrying Capacity of Tension Transmission Tower, Pages 679-686
http://dx.doi.org/10.1016/j.proeng.2016.08.226
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Optimal internal architectures of femoral bone based on relaxation by homogenization and isotropic material design PDF Print E-mail
mech r cI. Goda, J.F Ganghoffer, S. Czarnecki, P. Wawruch, T. Lewiński
Optimal internal architectures of femoral bone based on relaxation by homogenization and isotropic material design
Mechanics Research Communications, DOI:dx.doi.org/10.1016/j.mechrescom.2016.06.007
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Abstract
The influence of the loading conditions on the trabecular architecture of a femur is investigated by using topology optimization methods. The response of the bone to physiological loads results in changes of the internal architecture of bone, reflected by a modification of internal effective density and mechanical properties. The homogenization based optimization model is developed for predicting optimal bone density distribution, wherein bone tissue is assumed to be a composite material consisting of a mixture of material and void. The homogenization scheme treats the geometric parameters of the microstructures and their orientation as design variables and homogenizes the properties in that microstructure, which is generally anisotropic. The penalization of the optimal material density then leads to a classical optimal structure which consists of regions with bone material and regions without bone material. The IMD (Isotropic Material Design) approach is next applied to determine the optimal elasticity tensor in terms of the bulk and shear moduli as well for the present loading applied to the femoral bone sample. IMD is able to provide both the external shape and topology together with the optimal layout of the isotropic moduli. Both topology optimization methods appear to be complementary. Simulations of the internal bone architecture of the human proximal femur results in a density distribution pattern with good consistency with that of the real bone.
 
Simply supported Michell trusses generated by a lateral point load PDF Print E-mail
structural optimizationT. Sokół and T. Lewiński: Simply supported Michell trusses generated by a lateral point load. Structural and Multidisciplinary Optimization. (2016) 54:1209–1224, DOI 10.1007/s00158-016-1480-8.
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Abstract:
The paper deals with the optimum design problem posed by George Rozvany: find the lightest fully stressed truss transmitting a given concentrated force to two supports forming a line parallel to the force. One of the supports is a hinge while the second one is a roller. The feasible domain is a square domain over the line linking the supports. The problem thus formulated belongs to the class of the three force problem, till now unsolved in general. In the problem stated here two of the three forces are mutually orthogonal. The family of solutions to this problem is parameterized by the coordinates of the point of the force application, hence is a two-parameter family. This seemingly simple problem generates a vast family of extremely interesting solutions, some of them being known, some being only partly resolved, while others turn out to be surprising and not resolved till now. The present paper delivers exact solutions to the optimum designs corresponding to the force position being a sufficiently big distance to the line linking the supports. The kinematic and static approaches are used, both leading to the same exact results. Other solutions are constructed numerically by the adaptive ground structure method.
 
Advances in Mechanics: Theoretical, Computational and Interdisciplinary Issues. PDF Print E-mail
balkema cmm pcm mAdvances in Mechanics: Theoretical, Computational and Interdisciplinary Issues. M. Kleiber, T. Burczyński, K. Wilde, J. Górski, K. Winkelmann, Ł. Smakosz (Eds). CRC Press, 2016. ISBN 978-1-138-02906-4
1. K. Bołbotowski & T. Sokół: New method of generating Strut and Tie models using truss topology optimization, pp. 97-100
2. S. Czarnecki & P. Wawruch: Construction of stress trajectories in optimal, non-homogeneous elastic bodies, pp. 137-140
3. T. Łukasiak: HSρ – an isotropic material interpolation scheme based on Hashin-Shtrikman variational bounds, pp. 355-359
4. T. Sokół: A new adaptive ground structure method for multi-load spatial Michell structures, pp. 525-528
 
Theoretical Foundations of Civil Engineering, Polish-Ukrainian Transactions, 2015 PDF Print E-mail
23 tfoce p u mTheoretical Foundations of Civil Engineering, Polish-Ukrainian Transactions, v. 23, ed. W. Szcześniak, Warsaw 2015, ISBN 978-83-7814-500-4
Prace pracowników ZMBiZI:
1. Jubileusz 75-tej rocznicy urodzin Profesora Wacława Szcześniaka, Ataman M.,Kozyra Z., Zbiciak A., pp. 9-22
2. Discretization of random field loads with respect to form analysis, Czmoch I., pp. 71-78
3. Charakterystyki modalne konstrukcji wsporczych linii elekroenergetycznych, Dudziak S., Kozyra Z., pp-79-88
4. Izotropowe kompozyty periodyczne modelowane laminatami ortogonalnymi, Łukasiak T., pp. 121-128
5. Modelowanie cięgna nierozciągliwego w programie ABAQUS, Wójcik-Grząba I., Dzierżanowski G., pp. 173-181

 
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