Sökning: "cutting resistance"

Visar resultat 1 - 5 av 51 avhandlingar innehållade orden cutting resistance.

  1. 1. Resistance and recolonization of bryophyte assemblages following disturbances - detecting patterns and exploring mechanisms

    Detta är en avhandling från Stockholm : Department of Botany, Stockholm University

    Författare :Martin Schmalholz; Stockholms universitet.; [2010]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bryophytes; boreal forest; boulders; clear-cutting; disturbance; establishment; insect outbreaks; microtopography; recolonization; resistance; spatial heterogeneity; succession; wildfires; NATURAL SCIENCES Biology; NATURVETENSKAP Biologi; växtekologi; Plant Ecology;

    Sammanfattning : Disturbances are ubiquitous features of most northern forest ecosystems. The subsequent response of plant assemblages on both short (resistance or not) and long term (recolonization or not) will depend on a number of factors operating at several spatial scales. LÄS MER

  2. 2. Tribology at the Cutting Edge A Study of Material Transfer and Damage Mechanisms in Metal Cutting

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Julia Lundberg Gerth; Uppsala universitet.; [2012]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tribology; Metal cutting; Gear hobbing; Wear; Coating; Residual stress; Material transfer; Steel; Teknisk fysik med inriktning mot tribomaterial; Engineering Science with specialization in Tribo Materials;

    Sammanfattning : The vision of this thesis is to improve the metal cutting process, with emphasis on the cutting tool, to enable stable and economical industrial production while using expensive tools such as hobs. The aim is to increase the tribological understanding of the mechanisms operating at a cutting edge and of how these can be controlled using different tool parameters. LÄS MER

  3. 3. On wear of wood-cutting tools : Tool materials, wear mechanisms and modelling

    Detta är en avhandling från Karlstad : Karlstad University Studies

    Författare :Johan Nordström; [2005]
    Nyckelord :Tool material; Wood cutting; Wear; Modelling;

    Sammanfattning : Bandsaw blades are commonly used in the sawmill industry for timber cutting. The saw teeth are gradually worn during cutting and will finally cause unacceptable surface roughness and dimensional deviations on the sawn wood product. Maintenance by re-sharpening of the saw teeth is therefore necessary after a certain time of sawing. LÄS MER

  4. 4. Challenges in Resistance Welding of Ultra High Strength Steels

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Erik Tolf; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Resistance welding; spot welding; surface cracks; nut welding; UHSS; projection welding; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : Increasing the use of Ultra High Strength Steels (UHSS) in vehicle bodystructures is important for reducing weight and cutting CO2 emissions. This thesis investigates challenges in resistance welding that can be a barrier to implementing UHSS as a replacement for low strength steels in vehicle structures. LÄS MER

  5. 5. Granulation and recycling of polymers

    Detta är en avhandling från Division of production and materials engineering

    Författare :Toni Reftman; [2002]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materialteknik; Materiallära; Material technology; akustik; vibrationer; vakuumteknik; granulation; granulators; recycling; size reduction; cutting resistance; hydraulics; Mechanical engineering; vacuum technology; vibration and acoustic engineering; hydraulik; Maskinteknik; Polymer technology; biopolymers; Polymerteknik;

    Sammanfattning : The use of polymers and composite materials based on polymer matrix systems increases. With this raise the demands on recycling of both post-consumer and in house based material increase. The demands on the recycling process also increase. The reason is that the process more often has to be a part of the conventional production line. LÄS MER