Sökning: "small cracks"

Visar resultat 1 - 5 av 100 avhandlingar innehållade orden small cracks.

  1. 1. Small-scale Experiments for Blast-induced Damage: Exploring crack propagation through Digital Image Correlation

    Författare :Carlota Rodriguez San Miguel; Changping Yi; Nikolaos Petropoulos; Daniel Johansson; Pablo Segarra Catasus; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Small-scale experiments; Blast-induced cracks; Digital Image Correlation; Crack propagation behavior; Mining and Rock Engineering; Gruv- och berganläggningsteknik;

    Sammanfattning : Blasting plays a crucial role in several engineering applications, from mining and tunneling to demolition projects. One of the remaining challenges of this process is that it can significantly affect the integrity of the rock mass by inducing damage in the form of cracks. LÄS MER

  3. 2. Deformation and Fatigue Behaviour of Porous and Dense Austenitic Stainless Steel

    Författare :Ulf Lindstedt; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mechanical properties; austenitic stainless steel; PM steel; nitrogen; small cracks; previous particle boundaries; microplasticity; grain size dependence; fatigue; porosity;

    Sammanfattning : PM stainless steels are increasing in use and are expected to do so in the future. A lot of work has been carried out concerning production and sintering of stainless steel powders and on the resulting corrosion behaviour. The deformation behaviour of these materials is less studied. LÄS MER

  4. 3. Durability of sprayed concrete : steel fibre corrosion in cracks

    Författare :Erik Nordström; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

    Sammanfattning : A combination of sprayed concrete technique and steel fibre technology gives obvious advantages when saving the work needed to place conventional reinforcement. In rock strengthening applications this is most accentuated. Sprayed concrete in general, made by skilled workmen, will generally be of high quality and good durability. LÄS MER

  5. 4. Cracks in the Ivory Tower : Antibiotics Research and the Changes in Academia 1980-2015

    Författare :Carl Björvang; Alexandra Waluszewski; Lars Fälting; Oili-Helena Ylijoki; Uppsala universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; antibiotic research; academic capitalism; scientific discoveries; research policy; Swedish research; antibiotic resistance; antibacterial treatment; Ekonomisk historia; Economic History;

    Sammanfattning : At the same time as resistance to antibiotics became an increasingly problematic health care concern around the world, major changes occurred in the condition scientists faced when conducting university-based research. This thesis aims to study these changes as they applied to antibacterial and bacteriological research, and how they influenced the researchers’ ability to make new scientific discoveries. LÄS MER

  7. 5. Wood fingerprint recognition and detection of thin cracks

    Författare :Tobias Pahlberg; Olle Hagman; Matthew Thurley; Michael Felsberg; Luleå tekniska universitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; Träteknik; Wood Science and Engineering;

    Sammanfattning : The first part of this thesis deals with recognition of wood fingerprints extracted from timber surfaces. It presents different methods to track sawn wood products through an industrial process using cameras. LÄS MER