Sökning: "Strain rates"

Visar resultat 6 - 10 av 59 uppsatser innehållade orden Strain rates.

  1. 6. Cryogenic properties of additive manufactured austenitic stainless steels for space applications

    Master-uppsats, Luleå tekniska universitet/Materialvetenskap

    Författare :Patricio Piantanida; [2023]
    Nyckelord :austenitic stainless steel; additive manufacturing; cryogenic;

    Sammanfattning : The mechanical properties of three austenitic stainless steel alloys, namely 21-6-9, 316L and a modifed 316, fabricated via laser powder bed fusion, have been studied. From the results previously obtained through tensile tests at room and cryogenic temperatures, their strength and ductility were compared against similar conventionally processed materials. LÄS MER

  3. 7. Rate-dependent effects on the mechanical behaviour of paper

    Master-uppsats, KTH/Hållfasthetslära

    Författare :Satyasarathi Poddar; [2023]
    Nyckelord :;

    Sammanfattning : It is established that paper properties depend on the loading rate. The rule of thumb is that the in-plane strength and stiffness increases about 10\%, when the strain rate increases by a factor of 10. Converting of paperboard into packages requires creasing of the paperboard followed by folding to make 3 dimensional packages. LÄS MER

  4. 8. Development of thick GaN and AlGaN drift layers for vertical power devices

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Andri Dhora; [2023]
    Nyckelord :Technology and Engineering;

    Sammanfattning : High-quality, thick III-nitride epitaxial drift layers with controlled doping are needed for next-generation highly efficient vertical power devices for a smart grid applications and electrification of mobility. Achieving desirable material properties, such as low background impurity concentrations and reduced dislocation densities in combination with high growth rates, necessary for practical application present a challenge. LÄS MER

  5. 9. Grönska i centrum : -en fallstudie i Örnsköldsvik

    Kandidat-uppsats, Umeå universitet/Institutionen för geografi

    Författare :Johanna Johansson; [2022]
    Nyckelord :Green areas; city planning; ecosystem services; sustainability; trees; air pollution.; Grönska; stadsplanering; ekosystemtjänster; hållbarhet; träd; luftföroreningar;

    Sammanfattning : Today almost half the world’s population live in cities, and urbanization rates continue to increase. This puts a lot of strain on green areas in urban environments where sustainability can often be a problem. LÄS MER

  7. 10. Characterization of commercially pure titanium under supercritical conditions : By means of hybrid numerical-experimental approach

    Master-uppsats, KTH/Materialvetenskap

    Författare :Ricardo Rodríguez; [2022]
    Nyckelord :;

    Sammanfattning : Material characterization was addressed by solving the inverse engineering problem to mechanical properties by means of finite element analysis and computational optimization. High-temperature and high strain-rate data from split Hopkinson pressure bar tests on commercially pure titanium were used in the study. LÄS MER