Sökning: "damage"

Visar resultat 1 - 5 av 2127 avhandlingar innehållade ordet damage.

  1. 1. Damage Tolerance of Impacted Composite Sandwich Structures

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Moeen ud din Saeed Rajput; KTH.; [2018]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; composite sandwich; cellular; polymer; material characterization; modulus; non-crimp fabric; low velocity impact; vibration; uncertainty analysis; drop-weight impact; fractography; barely visible impact damage; X-ray microtomography; compression-after-impact; bending-after-impact; high speed image processing; damage resistance; damage tolerance; Aerospace Engineering; Flyg- och rymdteknik;

    Sammanfattning : This thesis deals with damage tolerance of impacted sandwich structures for load bearing applications. Composite sandwich structures find wide application as lightweight solutions in aerospace components, since weight reduction and less fuel emissions are primary concerns for aircraft manufactures. LÄS MER

  2. 2. Ductile damage modeling of the machining process

    Detta är en avhandling från ; Chalmers tekniska högskola; Gothenburg

    Författare :SENAD RAZANICA; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ductile fracture; Damage threshold criterion; Damage evolution; Machining simulation; Mesh dependence; Thermodynamics; Johnson-Cook; Damage driving energy;

    Sammanfattning : Machining processes are among the most common manufacturing processes for producing components used on a daily basis. It is a complex material removal process. Today, the research and development within the manufacturing industry is addressed by cost efficient numerical simulation strategies rather than by costly experimental procedures. LÄS MER

  3. 3. Towards frost damage prediction in asphaltic pavements

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Lisa Lövqvist; KTH.; [2019]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; frost damage; winter damage; asphalt; pavements; micromechanical model; microstructure; freeze-thaw cycles; finite element model; Civil and Architectural Engineering; Byggvetenskap;

    Sammanfattning : Roads are subjected to mechanical loads from the traffic as well as deteriorating mechanisms originating from the surrounding environment and climate. The damage arising is particularly severe during the winter season, when for example raveling, pot holes and cracks can emerge on the surfaces of asphaltic roads. LÄS MER

  4. 4. Modeling DNA Damage

    Detta är en avhandling från Stockholm : Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi

    Författare :Patric Schyman; Stockholms universitet.; [2008]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DNA; Ionizing radiation; DNA radicals; Strand break; Hydrogen abstraction; Density Functional Theory; Car-Parrinello Molecular Dynamics; QM MM; NATURAL SCIENCES Chemistry Physical chemistry; NATURVETENSKAP Kemi Fysikalisk kemi; Physical Chemistry; fysikalisk kemi;

    Sammanfattning : In this thesis methods of computational chemistry have been used to examine DNA damaging processes initiated by ionizing radiation, free radicals, or Low-Energy Electrons (LEE).The computational chemistry method based on quantum mechanics that has been mainly used here is the Density Functional Theory (DFT). LÄS MER

  5. 5. Monitoring forest damage

    Detta är en avhandling från Stockholm : Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi

    Författare :Sören Wulff; Sveriges lantbruksuniversitet.; [2011]
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : .... LÄS MER