Abstract Fracture of materials with rate-dependent mechanical behaviour, e.g. polymers, is a highly complex process. For an adequate modelling, the coupling between stiffness, dissipative mechanisms present in bulk material and crack driving force has to be accounted for appropriate manner. In addition, resistance against propagation can depend on rate deformation. this contribution, energetic ...

gas-lift pumps are devices for lifting liquid phase incorporating the gas phase to be injected in the bottom of liquid column. they are widely used in various industrial applications such as oil extracting in petroleum industries. gas-liquid flow being the main part of the flow through these systems, flowing in vertical pipes of gas-lift pumps has different regimes namely bubbly, slug, churn an...

Abstract For the fatigue life of thin-walled components, not only crack initiation, but also growth is decisive. The phase-field method for fracture a powerful tool to simulate arbitrary phenomena. Recently, it has been applied fracture. Those models pose an alternative classical fracture-mechanical approaches estimation. In first part this paper, parameters model are calibrated and its predict...

Because of installation for local consumers and since it is free of all contaminations, connecting photovoltaic cells to the grid via single-phase inverter is significantly on the rise. In this paper, a new simple current control is proposed for a single-phase grid-connected voltage source inverter. Using the PQ theory and modelling a single-phase system as an unbalanced three-phase system, a m...