Sökning: "Residual life"

Visar resultat 16 - 20 av 170 avhandlingar innehållade orden Residual life.

1. 16. Fatigue strength of welds in 800 MPa yield strength steels : Effects of weld toe geometry and residual stress

   Författare :Ebrahim Harati; Lars-Erik Svensson; Leif Karlsson; Högskolan Väst; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Fatigue strength; Residual stress; Welds; Weld toe geometry; High strength steel; Weld Impression Analysis; Laser Scanning Profiling; Structured Light Projection; Manufacturing and materials engineering; Produktions- och materialteknik;

   Sammanfattning : Nowadays there is a strong demand for lighter vehicles in order to increase the pay load. Through this the specific fuel consumption is decreased, the amount of greenhouse gases is lowered and the transport economy improved. One possibility to optimize the weight is to make the components from high strength steels and join them by welding. LÄS MER

3. 17. Improving a bridge fatigue life prediction by monitoring

   Författare :John Leander; Raid Karoumi; Mohammad Al-Emrani; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Civil engineering and architecture; Samhällsbyggnadsteknik och arkitektur;

   Sammanfattning : For steel railway bridges, fatigue is the main reason for a limited service life. An initial prediction of the fatigue life is usually performed using loads and conservative assumptions stated in the governing standards. The result is used for decisions of further actions. LÄS MER

4. 18. Fatigue of Spot Welded Joints: Experiments and Life Predictions

   Författare :Hans-Fredrik Henrysson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; crack closure; crack propagation; crack initiation; finite element method; damage accumulation; variable amplitude; fracture mechanics; fatigue; spot welds;

   Sammanfattning : Methods to assess the fatigue strength of spot welds in built-up structures are used on a daily basis in the automotive industry. Efficient and reliable numerical methods make it possible to achieve designs with low weight, low manufacturing costs and good durability within short development cycles, since the number of prototypes built can be reduced. LÄS MER

5. 19. Functional outcome and experiences concerning daily life after malunion of the distal radius and corrective osteotomy

   Författare :Ingrid Andreasson; Göteborgs universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Distal radius fracture; Malunion; Corrective osteotomy; Functional outcome; Activities of daily life; First post-operative year; Long-term;

   Sammanfattning : BACKGROUND. Distal radius fractures are common injuries that occur at all ages. The commonest complication is that the fracture heals in malunion. This can negatively affect function and the ability to perform activities. LÄS MER

7. 20. Congenital clubfoot : Aspects on epidemiology, residual deformity and patient reported outcome

   Författare :Henrik M Wallander; Göran Hansson; Sune Larsson; Michael Benson; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Congenital clubfoot; incidence; ultrasonography; forefoot adduction; navicular position; spurious correction; Ilizarov External Fixator; subjective outcome; stiffness; patient reported outcome; norm group; gender difference; Orthopaedics; Ortopedi; Orthopaedics; ortopedi;

   Sammanfattning : The overall aim of this thesis on congenital clubfoot was to estimate the incidence with a national perspective, analyse residual deformities and their management, and evaluate patient reported long-term quality of life and foot function. Paper I was a prospective, nationwide sampling of 280 children with congenital clubfoot during 1995-96. LÄS MER