Search for dissertations about: "friction"

Showing result 36 - 40 of 787 swedish dissertations containing the word friction.

  2. 36. Friction in metal powder pressing : measurement and characterisation

    Author : Naghi Solimanjad; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : The present work describes different methods for measuring and characterisation of friction in powder compaction process. A new test apparatus has been developed and presented which gives possibility of directly measurement of coefficient of friction during pressing from low to relative high density. READ MORE

  4. 37. Existence theorems for noncoercive incremental contact problems with Coulomb friction

    Author : Andreas Rietz; Lars-Erik Andersson; Jaroslav Haslinger; Linköpings universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematics; Coulomb friction; noncoercive; normal compliance; mollification; MATEMATIK; MATHEMATICS; MATEMATIK;

    Abstract : Friction is a phenomenon which is present in most mechanical devices and frequently encountered in everyday life. In particular, understanding of this phenomenon is important in the modelling of contact between an elastic object and an obstacle. READ MORE

  5. 38. Mechanisms and Phenomena in Braking and Gripping

    Author : Lars Hammerström; Staffan Jacobson; XXX XXX; Uppsala universitet; []
    Keywords : Materials science; Friction; Brake; Texture; Squeal; Materialvetenskap;

    Abstract : Applications relying on a high static friction include various types of fixtures, couplings, bolted joints, torsion joints, etc. The common characteristic of these applications is that they rely on the friction force to maintain the relative position of two mating surfaces. READ MORE

  6. 39. Force measurements using scanning probe microscopy : Applications to advanced powder processing

    Author : Anders Meurk; KTH; []
    Keywords : atomic force microscope; AFM; SPM; van der Waals interaction; DLVO-theory; surface forces; colloidal probe; force curve; friction; adhesion; stick-slip; cantilever; calibration; spring constant; silicon nitride; iron; silica;

    Abstract : The object of this thesis is to apply scanning probemicroscopy (SPM) to the field of advanced powder processing.Measurement of interparticle surface forces at conditionsrelevant to ceramic processing has been performed together withthorough studies of powder friction. READ MORE

  7. 40. Frictional studies and high strain rate testing of wood under refining conditions

    Author : Birgitta Svensson; Hans Höglund; Per A. Gradin; Mittuniversitetet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Friction; High strain rate testing; Wood; Mechanical pulping; Tribology; Refining; Energy consumption; Chemical engineering; Kemiteknik;

    Abstract : When producing thermomechanical pulps (TMP), wood chips and fiber material are loaded mechanically in a disc-refiner to separate the fibers and to make them flexible. In the process, much of the energy supplied is transferred to the fiber material through cyclic compression, shear and friction processes. READ MORE