Office of Research Support

Evolution and Verification of a Kinematic Hypothesis for Splitting of the Strain Energy

Lecture - January 25, 2018, 14:00–16:00
Prof. Herbert A. Mang, Vienna University of Technology, Austria

Splitting of the strain energy into its “non-membrane” and membrane percentage provides insight into the load-carrying mechanism of structures, subjected to proportional loading. It may be useful, for example, for sensitivity analysis of the initial post-buckling behavior of beams, arches, plates, and shells, and assemblies of such structures. The task of this work is to determine this percentage without computing insignificant numbers such as the values of the strain energy and its membrane part.  »»» 

Research on synthetic jets

Lecture - December 6, 2017 (Wednesday), 10:00–12:00
Doc. Ing. Zdeněk Trávníček, CSc.

Synthetic jets are fluid flows which are generated from periodically oscillating fluid. In spite of zero time-mean flux at the actuator, a non-zero time-mean jet flow can be generated (synthesized) from a train of individual fluid “puffs”. These flows have many perspective applications such as active control of flowfields and thermal fields (external and internal aerodynamics, cooling, mixing, etc.). The basic advantage is the simplicity – neither fluid source (compressor, blower, pump) nor supply piping is required.  »»» 

Modelling of yield surface distortion in the finite strain range

Lecture - November 15, 2017 (Wednesday), 10:00-12:00
Prof. A.V. Shutov, Lavrentyev Institute of Hydrodynamics, Novosibirsk State University

The talk is devoted to the phenomenological modelling of the stress response of metallic materials subjected to non-proportional loading conditions. As a preliminary step, a class of two-dimensional rheological models is introduced, capable of capturing the initial and strain-induced anisotropies of the analyzed material.  »»» 

Workshop Energy Industry in a Broader Context (30 November 2017, Prague)

Conference - The Czech Academy of Sciences, Národní 3, Prague, room 205, 9:00-16:00

„Connecting academia, commerce and government to shape our energy future“

Energy Industry in a Broader Context is a collaborative workshop involving scientists, power industry leaders and government officials to outline the future of the energy industry and discuss how energy technologies and the upcoming transition of the energy industry influence the environment, economy, public health, or public acceptance. The purpose is to debate the risks, constraints and opportunities for research of energy technologies of the future.  »»» 

Deformation-Induced Anisotropy in Porous Metals: Constitutive modeling and computational issues

Lecture - November 14, 2017 (Tuesday), 10:00-12:00
Prof. Nikolaos Aravas, Department of Mechanical and Industrial Engineering, University of Thessaly, Greece

A constitutive model for a porous metal subjected to general three-dimensional finite deformations is presented. The model takes into account the evolution of porosity and the development of anisotropy due to changes in the shape and the orientation of the voids during deformation. The pores are initially ellipsoidal and distributed randomly in an elastic-plastic matrix (metal). Under finite plastic deformation, the voids are assumed to remain ellipsoids, and to change their volume, shape, and orientation.  »»» 

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