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This paper reviews friction phenomena and friction models of interest for automatic control. Particular emphasis is given to two recently developed dynamic friction models, the Bliman-Sorine model and the LuGre model. These models capture many frictional phenomena observed in laboratory experiments. The behaviors of the models in different situations are discussed in detail. Methods for friction c
Regular column on theatre in the weekly newspaper Arbetaren (The Worker).
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MAX-lab is a national laboratory operated jointly by the Swedish Research Council and Lund University. Nowadays it consists of three storage rings and one electron pre-accelerator. Due to the improvement of nanotechnology, a new storage ring is needed. Hence, MAX IV will be 100 times more efficient than already existing synchrotron radiation facilities, becoming a leading facility for studies of p
The material model consists of a viscoelastic Burgers element and an additional viscoplastic element, which includes Bingham viscosity and a viscoplastic Kelvin element. For spherical and cylindrical cavities, expressions are derived for the stress and strain fields and volume convergence. Spherical and cylindrical cavities are treated in a unified formulation. The expressions for the transient ph
