Wydział Mechaniczny / Faculty of Mechanical Engineering / W1

Stały URI zbioruhttp://hdl.handle.net/11652/1

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Filtry

2006 - 200912010 - 20186

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Tematsearch.filters.applied.operator.equals: search.filters.subject.thin-walled structures

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Teraz wyświetlane 1 - 7 z 7
  • Pozycja
    Local Dynamic Buckling of C-Shape Profile Subjected to Bending
    (Wydawnictwo Politechniki Łódzkiej ; Katedra Dynamiki Maszyn - Wydział Mechaniczny Politechniki Łódzkiej, 2011) Urbaniak, Mariusz; Kubiak, Tomasz
    This paper deals with local dynamic buckling of thin-walled girder segments (short beam-columns) subjected to bending. Various shapes of pulse loading (triangle, trapezoid and rectangle) with a duration corresponding to the fundamental period of vibration were taken into account. Assumed boundary conditions correspond to a simple support, this agrees with conditions that exist in the place of the diaphragm in a long spar. The problem was solved by finite element method. In order to determine the critical load pulse amplitudes Volmir, Budiansky-Hutchinson, Ari-Gur and Simonetta criteria were employed.
  • Pozycja
    Influence of barely visible impact damages on stability and load carrying capacity of thin-walled structures subjected to compression
    (Wydział Mechaniczny. Katedra Wytrzymałości Materiałów i Konstrukcji Politechniki Łódzkiej, 2018) Gliszczyński, A.; Kubiak, T.
  • Pozycja
    Static Buckling of FML Columns in Elastic-Plastic Range.
    (Lodz University of Technology. Faculty of Mechanical Engineering. Department Division of Dynamics., 2016) Kołakowski, Zbigniew; Kowal-Michalska, Katarzyna
    The paper deals with the elasto-plastic buckling of thin-walled Fiber Metal Laminates short columns/profiles subjected to axial uniform compression. Structures of open and hollow (closed) cross-sections are considered build of at plate walls. Multilayered FML walls are considered as built of alternating layers of aluminum and fiber-glass composite. Three elastic-plastic theories are employed for constitutive relations description of aluminum layers i.e. fully elastic material behavior, the J2-deformation theory of plasticity and the J2 flow theory later both with Ramberg-Osgood formula application, whereas composite layers are assumed elastic within whole loading range. Some exemplary results determined with the application of own analytical-numerical method based on the Koiter's theory, in the Byskov and Hutchinson formulation are enclosed in the form of tables and plots.
  • Pozycja
    Experimental buckling tests of FML profiles.
    (Wydział Mechaniczny. Katedra Wytrzymałości Materiałów i Konstrukcji. Politechnika Łódzka, 2015) Mania, Radosław J.
  • Pozycja
    Impact behaviour of spot-welded thin-walled frusta.
    (Wydział Mechaniczny. Katedra Wytrzymałości Materiałów i Konstrukcji. Politechnika Łódzka, 2015) Kotełko, M.; Mołdawa, A.
  • Pozycja
    Interactive buckling in thin-walled beam-columns with widthwise varying orthotropy.
    (Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej, 2006) Kubiak, Tomasz
    An analysis of local buckling of thin-walled beam-columns, taking account global precritical bending within the first order approximation, is presented in the paper. The problem of interactive buckling of the structure is solved by means of Byskov and Hutchinson's (1977) or Koiter's (1976) approximation theory. Beam-columns made from orthotropic plates with the main directions of orthotropy parallel to the wall edges characterised by a widthwise varying orthotropy coefficient ni=Eyi/Exi are investigated. Beam-columns with open sections (i.e. channel sections), simply supported on the loaded edges, are analysed. The girders are subjected to loads which cause a uniform or linearly variable shortening of the edges.
  • Pozycja
    Static and dynamic interactive buckling regarding axial extension mode of thin-walled channel
    (Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej, 2010) Kołakowski, Zbigniew
    The present paper deals with an influence of the axial extension mode on static and dynamic interactive buckling of a thin-walled channel with imperfections subjected to uniform compression when the shear lag phenomenon and distortional deformations are taken into account. A plate model is adopted for the channel. The structure is assumed to be simply supported at the ends. Equations of motion of component plates were obtained from Hamilton's principle taking into account all components of inertia forces. In the frame of first order nonlinear approximation, the dynamic problem of modal interactive buckling is solved by the transition matrix using the perturbation method and Godunov's orthogonalization.