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Blaz Hudobivnik

Dr. Blaz Hudobivnik

Dr. Blaz Hudobivnik
Address
An der Universität 1
30823 Garbsen
Building
Room
303
Dr. Blaz Hudobivnik
Address
An der Universität 1
30823 Garbsen
Building
Room
303
  • Forschungsprojekte

    Virtual Elements For Engineering Appications

    • 2D VEM for crack-propagation
      Led by: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Team: A. Hussein
      Year: 2018
      Funding: IRTG 1627
    • Virtual element method (VEM) for phase-field modeling of brittle and ductile fracture
      Led by: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Year: 2018
      Funding: DFG SPP 1748
    • Virtual Element Method for Dynamic Applications
      The Virtual Element Method is a recent developed discretization method, which can be seen as an extension of the classical Galerkin finite element method. It has been applied to various engineering fields, such as elasto-plasticity, multiphysics, damage and fracture mechanics. This project focuses on the extension of VEM towards dynamic applications. In the first part the appropriate computation of the Massmatrix regarding the vitual element ansatzspace will be done. In future works, VEM will be applied to engineering problems, considering the dynamic behavior.
      Led by: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Team: M. Cihan
      Year: 2019
    • Virtual Element Method for 3D Contact
      Contact plays a very important role in engineering problems, where two or more bodies interact with each other through their surfaces. Many techniques were developed in the past, to formulate the contact constraint at the contact interface between two bodies. Nevertheless, VEM provides efficient and robust properties to enforce the contact constraint through the contact interface. Investigations in 2D have been done so far. This work aims an extensions of VEM to 3D contact problems.
      Led by: F. Aldakheel, B. Hudobivnik, P. Wriggers
      Team: M. Cihan
      Year: 2020
    • Virtual Kirchhoff-Love plate elements for isotropic and anisotropic materials
      The virtual element method allows to revisit the construction of Kirchhoff-Love elements because the C1-continuity condition is much easier to handle in the VEM framework than in the traditional finite element methodology. Here we study the two most simple VEM elements suitable for Kirchhoff-Love plates as stated in (Brezzi and Marini (2013)). The formulation contains new ideas and different approaches for the stabilization needed in a virtual element, including classic and stabilization. An efficient stabilization is crucial in the case of C1-continuous elements because the rank deficiency of the stiffness matrix associated to the projected part of the ansatz function is larger than for C0-continuous elements. This project aims at providing engineering inside in how to construct simple and efficient virtual plate elements for isotropic and anisotropic materials and at comparing different possibilities for the stabilization. Different examples and convergence studies discuss and demonstrate the accuracy of the resulting VEM elements. Finally, reduction of virtual plate elements to triangular and quadrilateral elements with 3 and 4 nodes, respectively, yields finite element like plate elements. These C1-continuous elements can be easily incorporated in legacy codes and demonstrate an efficiency and accuracy that is much higher than provided by traditional finite elements for thin plates.
      Led by: P. Wriggers, B. Hudobivnik
      Team: P. Wriggers, B. Hudobivnik, O. Allix
      Year: 2021

    Phase Field Modeling of Fracture in Multi-Field Environments

  • Publikationen und Vorträge

    Artikel in Journal

    • A. Hussein, P. Wriggers, B. Hudobivnik, F. Aldakheel, P.-A. Guidault, O. Allix (2020): Treatment of Brittle Fracture in Solids with the Virtual Element MethodVirtual Design and Validation
      DOI: https://doi.org/10.1007/978-3-030-38156-1_11
    • M. Cihan, F. Aldakheel, B. Hudobivnik, P. Wriggers (2020): Virtual Element Formulation For Finite Strain Elastodynamics
      arXiv: arXiv:2002.02680
    • Aldakheel, F., Hudobivnik, B., Hussein, A., (2018): Phase-field modeling of brittle fracture using an efficient virtual element schemeComputer Methods in Applied Mechanics and Engineering
    • B. Hudobivnik, F. Aldakheel and P. Wriggers (2018): Low order 3D virtual element formulation for finite elasto–plastic deformationsComputational Mechanics
    • M L. De Bellis, P. Wriggers, B. Hudobivnik, G. Zavarise (2018): Virtual element formulation for isotropic damageFinite Element Analysis and Design
    • P. Wriggers, B. Hudobivnik (2017): A low order virtual element formulation for finite elasto-plastic deformationsComputer Methods in Applied Mechanics and Engineering
      DOI: 10.1016/j.cma.2017.08.053
    • P. Wriggers, B.D. Reddy, W. T. Rust, B. Hudobivnik (2017): Efficient virtual element formulations for compressible and incompressible finite deformationsComputational Mechanics (2017) 60:253–268
      DOI: 10.1007/s00466-017-1405-4

    Vortrag

    • W. T. Rust, P. Wriggers, B. Hudobivnik, B. D. Reddy (2017): A Virtual Element Method for Large Deformation Contact88th Annual Meeting of the International Association of Applied Mathematics and Mechanics (GAMM 2017), 06-10 March 2017, Weimar, Germany
    • W.T. Rust, P. Wriggers, B. Hudobivnik, B.D. Reddy (2017): A Virtual Element Method for Large Deformation ContactPolytopal Element Methods in Mathematics and Engineering (POEMS 2017), 5-7 July, Milano, Italy
    • W.T. Rust, P. Wriggers, B. Hudobivnik, B.D. Reddy (2017): A Virtual Element Method for Large Deformation ContactModern Finite Element Technologies (MFET 2017), 21-23 August, Bad Honnef, Germany

 

Werdegang

1987Geboren in Ljubljana, Slowenien
1994-2002Grundschule Sostro, Ljubljana, Slowenien
2002-2006Technical gymnasium, Mittelschule für Elektrotechnik und Informationstechnik Ljubljana, Slowenien
2006-2011

Universität studium an der Fakultät fur Bauwessen und Gäodesie, Universität Ljubljana, Slowenien(UL FGG)

2002-2011Empfänger von Zois Stipendium
som.  2009Studentenarbeit beim IGMAT d.o.o., Ljuljana, Slowenien
2011-2015 Junge Forscher an der UL FGG
2015-2016 Forscher und Assistent mit Doktorat an der UL FGG
seit 11/2016Wissenschaftlicher Mitarbeiter (postdoc), Institut für Kontinuumsmechanik, Leibniz Universität Hannover, Deutchland

  Ausbildung

  • Ph.d. (dr.), Civil Engineering-Built Environment, Faculty of Civil and Geodetic Engineering, University of Ljubljana, Slovenia (Oct. 2011- Feb. 2016)
  • M. Sc. (univ. dipl. ing. grad), Civil Engineering-Structural Division, Faculty of Civil and Geodetic Engineering, University of Ljubljana, Slovenia (Oct. 2006- Sep. 2011)
  • Technical gymnasium- Computer Engineering, Secondary School of Electrical and Computer Engineering Ljubljana, Slovenia (Sep. 2002- Jun. 2006)
  • Primary school Sostro, Ljubljana, Slovenia (Sep. 1994- Jun. 2002)

  Aktuelles Projekt

  • Implementation of Virtual elements in AceGen

  Forschung

  • Automatic derivation of Finite Element code using AceGen and AceFEM software
  • General formulation of large strain strongly coupled problems
  • Derivation of Matrix functions for use in FE environment
  • Optimisation problems using Sensitivity analysis
  • Derivation of user suboutines for ABAQUS using AceGen (e.g. UMAT)

 Liste der Publikationen

Original wissenschaftlicher Artikel

  • Blaž Hudobivnik, Luka Pajek, Roman Kunič, Mitja Košir (2016), "FEM thermal performance analysis of multi-layer external walls during typical summer conditions considering high intensity passive cooling", Appl. energy, 178, pg. 363-375, doi: 10.1016/j.apenergy.2016.06.036.
  • Andjelka Stanić, Blaž Hudobivnik, Boštjan Brank (2016), "Economic-design optimization of cross laminated timber plates with ribs", Compos. struct., 154, št. Okt., pg. 527-537, doi: 10.1016/j.compstruct.2016.07.072.
  • Blaž Hudobivnik, Jože Korelc (2016), "Closed-form representation of matrix functions in the formulation of nonlinear material models", Finite elem. anal. des., 111, pg. 19-32, doi: 10.1016/j.finel.2015.12.002.

Wissenschaftlicher Konferenzbeitrag

  • Blaž Hudobivnik, Jože Korelc (2014), "Error free evaluation of tensor functions and their application in finite-strain models", V: 11th World Congress on Computational Mechanics (WCCM XI) and 5th European Conference on Computational Mechanics (ECCM V) and 6th European Conference on Computational Fluid Dynamics (ECFD VI), 20-25 July 2014, Barcelona, Spain, Eugenio Oñate, ur., Xavier Oliver, ur., Antonio Huerta, ur., Barcelona, [S.n.], pg. 1-12.
  •  Blaž Hudobivnik, Jože Korelc, Urša Šolinc, Georges Limbert (2014), "Optimizacija gubanja modela umetne kože z izoparametričnimi in izogeometričnimi končnimi elementi", in: Zbornik del, Kuhljevi dnevi 2014, Maribor, 24.-25. september, 2014, Matjaž Hriberšek, ur., Jure Ravnik, ur., Ljubljana, Slovensko društvo za mehaniko, 2014, pg. 63-70.
  • Blaž Hudobivnik, Jože Korelc (2013), "Automatic differentiation based formulation of coupled problems", in: Computational methods for coupled problems in science and engineering in: proceedings of the V International Conference on Computational Methods for Coupled Problems in Science and Engineering held in Ibiza, Spain 17-19 June 2013, S. Idelsohn, ur., Manolis Papadrakakis, ur., Bernhard Schrefler, ur., Barcelona, International Center for Numerical Methods in Engineering, pg. 1331-1342.
  • Blaž Hudobivnik, Jože Korelc (2013), "Matrična potenčna vsota v zaključeni obliki in njena uporaba v hiperelastičnih materialnih modelih", in: Zbornik del, Kuhljevi dnevi 2013, Rogaška Slatina, 25.-26. september, 2013, Matjaž Hriberšek, ur., Jure Ravnik, ur., Ljubljana, SDM - Slovensko društvo za mehaniko, pg. 65-72.
  • Blaž Hudobivnik, Jože Korelc (2012), "Na avtomatskem odvajanju bazirana formulacija povezanih problemov", in:  Zbornik del, Kuhljevi dnevi 2012, Rogaška Slatina, 26.-27. september, 2012, Matjaž Hriberšek, ur., Jure Ravnik, ur., Ljubljana, Slovensko društvo za mehaniko, str. 65-72.