Sökning: "Compression fracture"

Visar resultat 16 - 20 av 78 avhandlingar innehållade orden Compression fracture.

  1. 16. Fracture and stress in powder compacts

    Författare :Pär Jonsén; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : In the field of powder metallurgy (PM), the production methods are constantly developed and improved to produce components with high precision and strength. Cold uniaxial pressing of powder into a green body is a common process in PM. LÄS MER

  3. 17. Clinical and morphological aspects of metastatic spinal cord compression

    Författare :Johan Wänman; Sead Crnalic; Lukas Bobinski; Pawel Grabowski; Pernilla Wikström; Anders Bergh; Elin Thysell; Helena Brisby; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Bone metastasis; metastatic spinal cord compression; surgery for spinal metastases; Spinal Instability Neoplastic Score; prostate cancer; Orthopaedics; ortopedi; Orthopaedics; ortopedi;

    Sammanfattning : Background: Metastatic spinal cord compression (MSCC) is a serious complication of cancer leading to demyelination and axonal damage of the spinal cord with a risk of para/tetraplegia. It is most common in patients with known cancer but may also be the initial manifestation of malignancy (IMM). LÄS MER

  4. 18. Alternative techniques in trochanteric hip fracture surgery. Clinical and biomechanical studies on the Medoff sliding plate and the Twin hook

    Författare :Ola Olsson; Lund Ortopedi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ortopedi; Kirurgi; traumatology; hip fracture; trochanteric; internal fixation; radiography; randomised trial; complication; biomechanics; orthopaedics; Surgery; traumatologi;

    Sammanfattning : In allowing compression along the femoral shaft (uniaxial dynamization) and optional compression along the femoral neck (biaxial dynamization), the Medoff sliding plate (MSP) represents a new principle in the fixation of trochanteric hip fractures. The Twin hook with 2 apical hooks was designed as an alternative to the lag screw. LÄS MER

  5. 19. Towards energy-based fracture modelling for crashworthiness applications

    Författare :Simon Jonsson; Jörgen Kajberg; Stefan Golling; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : The automotive industry is currently adapting to progessively more stringent emission and safety regulations imposed by governmental agencies. This introduces significant design difficulties due to the conflicting nature of passenger safety in automotive manufacturing, namely that increased crashworthiness generally leads to heavier vehicles, which in turn leads to more severe crashes. LÄS MER

  7. 20. Deformation and failure of brittle rocks under compression

    Författare :Chunlin Li; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Sammanfattning : This thesis describes the deformation and failure of rocks under compression through a micromechanics model and laboratory studies of the Kaiser effect. It comprises an overview and seven appended papers. The deformation model is developed based on the analysis of the behaviour of microcracks. LÄS MER