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Cyclic plasticity model using one yield surface only

A time-independent plasticity model using only one yield surface and capable of predicting cyclic loading is presented. Memory points are defined to monitor the loading history; these memory points have the property that they can be created as well as disappear during the load history. The generalized plastic modulus is defined from these memory points in such a way that it will be continuous and

To Fold or To Fibrillate? Serendipity in Stability Studies

Popular Abstract in Swedish Det finns tre typer av makromolekyler som är grundläggande för allt liv på jorden: DNA, RNA och proteiner. I varje cell i kroppen finns en kopia av vår arvsmassa, DNA. Denna består av gener som avkodas först till RNA och sedan till tiotusentals proteiner. Alla gener är inte aktiva i varje cell eller i varje tidpunkt. Proteiner kontrollerar nästan alla aspekter av det viProteins are complex structures and years of research have been spent on attempts to understand their complexity. The non-covalent interactions involved in protein folding are: hydrophobic effect, electrostatic interactions, van der Waals interactions and hydrogen bonding. It has been of great interest to address the importance of each of those interactions in proteins. While hydrophobic effect is

Experimental Studies of Turbulent Mixing in Impinging Jets

This thesis concerns the experimental study of mixing and flow characteristic in turbulent circular impinging jets without and with jet orifice manipulators (i.e. passive-fixed perturbations atthe nozzle exit), without and with swirl. The goal of the studies is to understand the basic mechanisms that control the mixing processes in turbulent impinging jets. The applications of such mixing processe