Sökning: "Engineering mechanics"

Visar resultat 1 - 5 av 1993 avhandlingar innehållade orden Engineering mechanics.

  1. 1. Adhesive Joining for Crashworthiness -Material Data and Explicit FE-methods

    Detta är en avhandling från Chalmers University of Technology

    Författare :Thomas Carlberger; Högskolan i Skövde.; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TECHNOLOGY Materials science; TEKNIKVETENSKAP Teknisk materialvetenskap; Technology; Teknik; Adhesive joining; Dynamic fracture; Cohesive zone; Interphase Element; Bimaterial joining; Hybrid joints; Teknisk mekanik; Engineering mechanics; Farkostteknik; Vehicle engineering; Fastkroppsmekanik; Solid mechanics; Adhesive joining; Dynamic fracture; Cohesive zone; Interphase Element; Bi-material joining; Hybrid joints;

    Sammanfattning : Today, crash simulations replace crash testing in the product development phase in theautomotive industry. High quality simulations enable shorter product development time andhigher competitiveness. LÄS MER

  2. 2. Washing Machine Design Optimization Based on Dynamics Modeling

    Detta är en avhandling från Chalmers University of Technology

    Författare :Thomas Nygårds; Chalmers tekniska högskola.; Chalmers University of Technology.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Reglerteknik; Automatic control; Fastkroppsmekanik; Solid mechanics; Konstruktionsteknik; Construction engineering; Övrig teknisk mekanik; Other engineering mechanics; Washing machine; Suspensions; Modeling; Experiments; Vibration dynamics; Multiobjective Optimization; Automatic balancing; Semi-active control.;

    Sammanfattning : The spinning process in a washing machine is a source of undesired vibrations and noise and may cause discomfort both to the user as well as for the machine itself due to vibrations which have impact on system lifetime, reliability of operation and capacity. The aim of this thesis is to develop mathematical and computational models of a washing machine of modern type and use these models for dynamics analysis and in optimization routines to make improvements of the machine mechanical design. LÄS MER

  3. 3. Thermal impact on rolling contact fatigue of railway wheels

    Detta är en avhandling från Chalmers University of Technology

    Författare :Sara Caprioli; Chalmers tekniska högskola.; Chalmers University of Technology.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Railway wheels; Tread braking; Rolling contact fatigue; Thermal fracture; Frictional rolling contact; Thermomechanical finite element analysis;

    Sammanfattning : Rolling contact fatigue (RCF) is a very common and costly damage mechanism for rails and wheels. This thesis investigates the influence of combined thermal and mechanical loading on RCF of railway wheels on the basis of numerical predictions. LÄS MER

  4. 4. Multi-objective optimization of railway bogie suspension damping

    Detta är en avhandling från Chalmers University of Technology

    Författare :Albin Johnsson; Chalmers tekniska högskola.; Chalmers University of Technology.; [2011]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Optimeringslära; systemteori; Optimization; systems theory; Farkostteknik; Vehicle engineering; Fastkroppsmekanik; Solid mechanics; Övrig teknisk mekanik; Other engineering mechanics; Multi-objective optimization; Railway vehicle dynamics; Bogie suspension design; Pareto optimized bogie primary and secondary suspensions damping;

    Sammanfattning : In this thesis multi-objective optimization is used to find Pareto fronts showing the set of optimized damping parameters of primary and secondary bogie suspensions. Special interests are put on requirements to enhance safety and comfort of a railway vehicle. LÄS MER

  5. 5. Numerical Simulations of Flows around Trains and Buses in Cross Winds

    Detta är en avhandling från Chalmers University of Technology

    Författare :Hassan Hemida; Chalmers tekniska högskola.; Chalmers University of Technology.; [2008]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Övrig samhällsbyggnadsteknik och arkitektur; Other civil engineering and architecture; Farkostteknik; Vehicle engineering; Mekanisk energiteknik; Mechanical energy engineering; Strömningsmekanik; Fluid mechanics; winds; LES; DES; Trains and buses aerodynamics;

    Sammanfattning : When cruising in strong winds, ground vehicles can experience strong aerodynamic forces and moments that may increase drag, reduce their stability, generate noise and induce accidents in the case of strong side winds. However, prevention of the unwanted influences of side winds requires that the flow structures around vehicles are fully understood in both the instantaneous and time-averaged flow. LÄS MER