Sökning: "cracks"

Visar resultat 16 - 20 av 468 avhandlingar innehållade ordet cracks.

  1. 16. Elastic Wave Propagation in Anisotropic Media. Application to Ultrasonic NDT

    Författare :A. Jonas Niklasson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; layered media; cylinders; cracks; integral equations; scattering; nondestructive testing; elastic waves; ultrasonics; transducers; anisotropy;

    Sammanfattning : The subject of this thesis is elastic wave propagation in anisotropic materials with application to ultrasonic nondestructive testing (NDT). The first part of the thesis is concerned with modeling of ultrasonic transducers and wave propagation in anisotropic materials in general. First, a scalar 2-D case is considered. LÄS MER

  3. 17. Thermally Modified Timber : Novel Aspects of Bending Behaviour Towards Grading and Structural Applications

    Författare :Joran van Blokland; Stergios Adamopoulos; Anders Olsson; Jan Oscarsson; Mark Hughes; Linnéuniversitetet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; checks; cracks; digital image correlation; four-point static bending; fracture characteristics; grade determining properties; non-destructive testing; Norway spruce; machine learning; outdoor above-ground exposure; timber grading; scanning electron microscopy; scanning of fibre direction; strain distribution; ThermoWood®; weathering; Forestry and Wood Technology; Skog och träteknik; Byggteknik; Civil engineering;

    Sammanfattning : Thermally modified timber (TMT) has gained market share in Europe as an environmentally friendly and durable building material. Unfortunately, TMT products are currently prohibited for use in structural applications as there is insufficient data to estimate the loss in strength due to thermal modification. LÄS MER

  4. 18. Nanoindentation on coatings

    Författare :Zhi-Hui Xu; KTH; []
    Nyckelord :nanoindentation; Berkovich; thin coatings; deformation behaviour; mechanical properties; mechanism-based strain gradient theory; dislocations; cracks; pileup; indentation size effect; atomic force microscopy; diamond-like-carbon; alumina; gold; alumi;

    Sammanfattning : .... LÄS MER

  5. 19. Sprickor i gemenskapen

    Författare :Elisabeth Broman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; skill; community understanding; generation shift; democratic dialogue; strategic lerarning; organisational development; trade union; social responsibility;

    Sammanfattning : Cracks in the Spirit of Community is a study of a Swedishtrade union in a period of change. Increasingly, traditionaltrade unions´ work based on collective solutions has comeinto question, and the customer perspective of trade unionactivities is becoming more prominent. LÄS MER

  7. 20. Two parameter characterization of propagating cracks : Annika Trädegård

    Författare :Annika Trädegård; KTH; []
    Nyckelord :;

    Sammanfattning : .... LÄS MER