Sökning: "design pressure"

Visar resultat 6 - 10 av 825 avhandlingar innehållade orden design pressure.

  1. 6. Computational Material Design : Diluted Magnetic Semiconductors for Spintronics

    Författare :Lunmei Huang; Rajeev Ahuja; Walter Temmerman; Uppsala universitet; []
    Nyckelord :Physics; Density functional theory; Diluted magnetic semiconductor; Ferromagnetism; Defect; Phase transition; High pressure; Thermal elastic constant; Fysik;

    Sammanfattning : The present thesis deals with the application of ab-initio electronic structure calculations based on density functional theory for material design.The correlation between magnetic properties and electronic structures has been investigated in detail for diluted magnetic semiconductors (DMS), which have promising application for spintronics devices. LÄS MER

  3. 7. Innovation under pressure : Reclaiming the micro-level exploration space

    Författare :Katarina Lund Stetler; Mats Magnusson; Jens Hemphälä; Salomo Sören; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ambidexterity; exploration; exploitation; creativity; innovation; micro-level exploration space; operational level; operations; operational effectiveness; employee; lean; lean thinking; process management; streamlining; flow; Machine Design; Maskinkonstruktion;

    Sammanfattning : Research & Development (R&D) departments are becoming increasingly structured and routine-based, with tight schedules and daily follow-ups. This way of working stems from increased demands for delivering products to customers quickly and with high quality at a low price. LÄS MER

  4. 8. Platform-Based Design - Design Rationale Aspects within the Configurable Component Concept

    Författare :Stellan Gedell; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; design rationale; derivate designs; configurable components; set-based design; product model; re-use; platform-based design; function-means tree;

    Sammanfattning : Competition, emanating from globalization and the continuing evolution in supplier chains, especially within the automotive industry, creates pressure on every phase of a design´s lifecycle to be more efficient. Requirements, which at least are perceived as conflicting, on one hand a low product price achieved by high volumes and economy of scale, and on the other hand the customers´ whish of individualized products, push for new approaches. LÄS MER

  5. 9. On Structural Design of High-Speed Craft

    Författare :Mikael Razola; Jakob Kuttenkeuler; Anders Rosén; Olav Fredrik Rognebakke; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; slamming; high-speed craft; finite-element analysis; design methods; experimental analysis; numerical simulations; design loads; statistical analysis;

    Sammanfattning : The development in structural design and construction of high-speed craft has been extensive during the last decades. Environmental and economical issues have increased the need to develop more optimized structures, using new material concepts, to reduce weight and increase performance efficiency. LÄS MER

  7. 10. Numerical Investigation of the Aerodynamic Vibration Excitation of High-Pressure Turbine Rotors

    Författare :Markus Jöcker; KTH; []
    Nyckelord :Aeroelasticity; Aerodynamics; Stator-Rotor Interaction; Excitation Mechanism; Unsteady Flow Computation; Forced Response; High Cycle Fatigue; Turbomachinery; Gas-Turbine; High-Pressure Turbine; Turbopump; CFD; Design;

    Sammanfattning : The design parameters axial gap and stator count of highpressure turbine stages are evaluated numerically towards theirinfluence on the unsteady aerodynamic excitation of rotorblades. Of particular interest is if and how unsteadyaerodynamic considerations in the design could reduce the riskofhigh cycle fatigue (HCF) failures of the turbine rotor. LÄS MER