Ing. Ján Kopačka, Ph.D.
|Department:||Department D 4 - Impact and Waves in Solids|
|Location:||Main Building, Dolejškova 1402/5, Praha|
|Publications:||Search in ASEP Database|
2010 − 2018: Doctoral study at Faculty of Mechanical Engineering, CTU in Prague, study programme Mechanics of solids, deformable bodies and continua
2004 − 2010: Graduate study at Faculty of Mechanical Engineering, CTU in Prague, study programme Engineering mechanics and mechatronics
2000 − 2004: Secondary School of Engineering, VOŠ, SPŠ a OV Čáslav, study programme Mechatronics
October 2018 - March 2019: Aerospace Mechanics Research Center, University of Colorado Boulder, Colorado, USA (six months)
April 2016: Institute for Structural Mechanics, University of Stuttgart, Germany (one month)
2013 − present: Researcher in Research Center of Manufacturing Technology
2010 − 2012: Design engineer in VAMET s.r.o.
2009 − present: Researcher in Institute of Thermomechanics AS CR, v. v. i.
Scientific Societies Membership
Czech Society for Mechanics
J. A. González, J. Kopačka, R. Kolman, S. S. Cho, K. C. Park, Inverse Mass Matrix for Isogeometric Explicit Transient Analysis via the Method of Localized Lagrange Multipliers, in Int. J. Numer. Methods Eng., p, 1-29, 2018, doi: 10.1002/nme.5986
J. Kopačka, A. Tkachuk, D. Gabriel, R. Kolman, M. Bischoff, J. Plešek, On stability and reflection-transmission analysis of the bipenalty method in contact-impact problems: a one-dimensional, homogeneous case study, in Int. J. Numer. Methods Eng., p, 1-25, 2017, doi: 10.1002/nme25712
R. Kolman, M. Okrouhlík, A. Berezovski, D. Gabriel, J. Kopačka, J. Plešek, B-spline based finite element method in one-dimensional discontinuous elastic wave propagation, in Applied Mathematical Modelling, vol. 46, p. 382-395, 2017, doi: 10.1016/j.apm.2017.01.077
J. Kopačka, D. Gabriel, J. Plešek, M. Ulbin, Assessment of methods for computing the closest point projection, penetration and gap functions in contact problems, in Int. J. Numer. Methods Eng., vol. 105, no. 11, p. 803-833, 2015, doi: 10.1002/nme.4994.
R. Kolman, S. V. Sorokin, B. Bastl, J. Kopačka, J. Plešek, Isogeometric analysis of free vibration of simple shaped elastic samples, in Journal of the Acoustical Society of America, vol. 137, no. 4, p. 2089-2100, 2015, doi: 10.1121/1.4916199.
J.Kopačka, D. Gabriel, R. Kolman, J. Plešek, A large deformation frictionless contact treatment in NURBS-based isogeometric analysis, in series Computational and Experimental Methods in Structures - Advances in computational coupling and contact mechanics, publisher. World Scientific, p. 416, 2018, ISBN: 978-1-78634-479-3, doi: 10.1142/9781786344786_0003
J.Kopačka, D. Gabriel, R. Kolman, J. Plešek, A symmetry preserving contact treatment in isogeometric analysis, in Proceedings of the 7th GACM Colloquium on Computational Mechanics for Young Scientists from Academia and Industry, Stuttgart, Germany, October 11-13, 2017. doi: 10.18419/opus-9334 pdf
J.Kopačka, D. Gabriel, R. Kolman, J. Plešek, On the contact pressure oscillations of an isogeometric contact-impact algorithm, in YIC GACM 2015, Aachen, Germany, July 20-22, 2015. pdf
J. Kopačka, D. Gabriel, J. Plešek, R. Kolman, Influence of mass lumping techniques on contact pressure oscillations in explicit finite element contact-impact algorithm based on isogeometric analysis with NURBS, in Proc. SVCS International Symposium on Stability, Vibration, and Control of Machines and Structures, Belgrade, Serbia, July 3-5, 2014. link
J. Kopačka, D. Gabriel, R. Kolman, J. Plešek, M. Ulbin, Studies in numerical stability of explicit contact-impact algorithm to the finite element solution of wave propagation problems, in Proc. 4th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering, Kos Island, Greece, June 12-14, 2013. pdf
J. Kopačka, R. Kolman, D. Gabriel, J. Plešek, Frictionless contact of elastic bodies: Comparison of treatment in finite element analysis and isogeometric analysis, in Proc. Engineering Mechanics 2012, Svratka, Czech Republic, May 14-17, 2012. pdf
J. Kopačka, D. Gabriel, J. Plešek, M. Ulbin, Utilising optimization methods for computing of normal vector to contact surface, in Proc. Engineering Mechanics 2010, Svratka, Czech Republic, May 10-13, 2010. pdf
J.Kopačka, D. Gabriel, R. Kolman, J. Plešek, Performance and implementation aspects of an isogeometric mortar-based contact algorithm, in MKP 2015, Prague, Czech Republic, November 26, 2015. pdf
J.Kopačka, D. Gabriel, J. Plešek, M. Ulbin, Computation of the distance between a point and a quadratic surface with application in contact mechanics, in EUROMECH Colloquium 540, Advanced Modelling of Wave Propagation in Solids, Prague, Czech Republic, October 1-3, 2012. pdf
J. Kopačka, Efficient and robust numerical solution of contact problems by the finite element method, PhD Thesis, 2018. pdf
J. Kopačka, Assessment of numerical procedures for determination of the penalty function in contact problems, Master's thesis, 2010. pdf