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.  »»» 

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.  »»» 

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.  »»» 

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.  »»»