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DTSTART:19700329T020000
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DTSTAMP:20200109T143200
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SUMMARY:Michael Neunteufel (TU Wien): "Nonlinear Shells – avoiding locking by the Hellan-Herrmann-Johnson method and Regge interpolation"
DESCRIPTION:Michael Neunteufel from the Institute for Analysis and Scientific Computing of TU Wien gives an invited talk on\n"Nonlinear Shells – avoiding locking by the Hellan-Herrmann-Johnson method and Regge interpolation"\nAbout the talk:\nFinding appropriate discretizations for nonlinear shells is still a challenging problem. For Kirchhoff plates the Hellan-Herrmann-Johnson method introduces a moment tensor for computing the fourth order equation as a mixed method.In this talk we present a generalization of these methods to nonlinear shells with large strains and rotations. We assume the Kirchhoff--Love hypothesis and focus on the bending energy. Therefore, we introduce the moment tensor in the finite element space H(divdiv). With these elements, also non-smooth surfaces with kinks can be handled directly. To overcome membrane locking for triangular meshes an interpolation operator into the so-called Regge space is inserted in the membrane energy term, weakening the number of implicitly given constraints.Finally, the method, which is implemented in the finite element library Netgen/NGSolve (www.ngsolve.org), is demonstrated by means of several numerical examples.\nAbout Mr. Neunteufel: Homepage of Mr. Neunteufel
DTSTART;TZID=Europe/Berlin:20200116T094500
LOCATION:Multimedia-Lectureroom (MMHS) of the Institute for Structural Mechanics, Pfaffenwaldring 7, Room 1.155, , , , 
URL;VALUE=URI:https://www.ibb.uni-stuttgart.de/en/news-and-events/events/Michael-Neunteufel-TU-Wien-Nonlinear-Shells-avoiding-locking-by-the-Hellan-Herrmann-Johnson-method-and-Regge-interpolation/
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