Sökning: "fatigue strength"

Visar resultat 16 - 20 av 208 avhandlingar innehållade orden fatigue strength.

1. 16. Kinetic chain weight training, strength assessment, and functional performance testing: with reference to sports and rehabilitation

   Författare :Jesper Augustsson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; open kinetic chain; closed kinetic chain; weight training; strength assessment; functional tests; anterior cruciate ligament; reconstruction; fatigue;

   Sammanfattning : The overall purpose of the studies was to obtain knowledge about physical performance in healthy individuals and patients after anterior cruciate ligament (ACL) reconstruction. Data are presented that concerns closed and open kinetic chain exercise, adaptive response to weight training, the methodology of muscle strength assessment, and the development of a functional testing protocol performed under conditions of fatigue. LÄS MER

3. 17. A study on wear characteristics of high strength steels under sliding contact

   Författare :Abdulbaset Mussa; Pavel Krakhmalev; Jens Bergström; Jens Hardell; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High strength steels; thread joint wear; punch wear; sliding wear; surface cracking; reciprocal sliding; fatigue; surface delamination; white etching layer; nano-structured layer; friction; Materialteknik; Materials Engineering;

   Sammanfattning : In the last decades, significant improvements regarding the design, materials and technology of rock drills have been made. Likewise, in sheet metal forming, forming tools experience very high contact pressures when processing high strength steel sheets. LÄS MER

4. 18. Very high cycle fatigue of tool steels

   Författare :Vitaliy Kazymyrovych; Jens Bergström; Arne Melander; Karlstads universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fatigue; crack growth; ultrasonic testing; tool steels; inclusions; Materialteknik; Materials Engineering;

   Sammanfattning : An increasing number of engineering components are expected to have fatigue life in the range of 107 - 1010 load cycles. Some examples of such components are found in airplanes, automobiles and high speed trains. LÄS MER

5. 19. Effect of shear cutting on metal fatigue

   Författare :David Gustafsson; Erik Olsson; Jörgen Kajberg; Pär Jonsén; Henrik Sieurin; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Punching; Trimming; Shear cutting; Fatigue; HCF; Residual stresses; Hållfasthetslära; Solid Mechanics;

   Sammanfattning : Lightweighting of automotive and heavy-duty vehicle components is an important task that does not need any further motivation or background. It can be read in a large part of the technical papers in the field. A common approach for finding lighter solutions is to increase the material grade while decreasing the material thickness. LÄS MER

7. 20. Fatigue, functional status, health and pulmonary rehabilitation in patients with chronic obstructive pulmonary disease

   Författare :Kersti Theander; Mitra Unosson; Berit Lundman; Linköpings universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; chronic obstructive pulmonary disease; fatigue; functional status; health; pulmonary rehabilitation; Fatigue impact scale; confirmatory factor analysis; Nursing; Omvårdnad;

   Sammanfattning : The aim of this thesis was to describe fatigue, functional limitations due to fatigue and health in patients with chronic obstructive pulmonary disease (COPD), as well as to compare patients with individuals from the general population and to test if pulmonary rehabilitation can reduce fatigue and functional limitations, and thus improve health. A further aim was to test the Fatigue Impact Scale (FIS) among patients with COPD. LÄS MER