Sökning: "FE-method"

Visar resultat 1 - 5 av 23 avhandlingar innehållade ordet FE-method.

  1. 1. Active Health Monitoring of Aerospace Composite Structures by Embedded Piezoceramic Transducers

    Författare :Christophe Paget; KTH; []
    Nyckelord :embedded; piezoceramic; piezoelectric; transducer; composite; structural; integrity; health monitoring; damage detection; Lamb waves; wavelets; normal-mode expansion; FE-method; SLMT;

    Sammanfattning : The objectives of the thesis work were to study theinteraction between embedded piezoceramic transducers andcomposite structures as well as determine techniques tosimplify the Lamb waves analysis. Firstly, this studyconsidered the design of the embedded piezoceramic transducers. LÄS MER

  3. 2. Simulation-driven design : Motives, Means, and Opportunities

    Författare :Ulf Sellgren; KTH; []
    Nyckelord :CAD; CAE; FE method; Metamodel; Object model; PDM; Physical behavior; System; Mechanical engineering; Maskinteknik;

    Sammanfattning : Efficiency and innovative problem solving are contradictory requirements for productdevelopment (PD), and both requirements must be satisfied in companies that strive to remainor to become competitive. Efficiency is strongly related to ”doing things right”, whereasinnovative problem solving and creativity is focused on ”doing the right things”. LÄS MER

  4. 3. The Hemming Process: A Numerical and Experimental Study

    Författare :Mats Sigvant; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; explicit FE method; joining; hemming; sheet metal forming;

    Sammanfattning : Finite element simulations of hemming, a method used in the automotive industry to join two sheet metal panels by bending the flange of the outer panel over the inner one, are dealt with in this thesis. This method is used mainly for assembly of closures in automotive bodies (i.e. side doors, hoods, trunk lids and tailgates). LÄS MER

  5. 4. Impact Simulation of Adhesively Joined Structures

    Författare :Thomas Carlberger; Högskolan i Skövde; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adhesive joining; Dynamic fracture; Cohesive zone; Interphase Element; Bi-material joining; Engineering mechanics; Teknisk mekanik; Teknik; Technology;

    Sammanfattning : The development of competitive and crashworthy automotive car bodies has reached so far that the manufacturers no longer rely on mono-material steel structures. Improved strength/weight performance may be achieved by using optimal material in each part of the car structure, leading to bi-material joints and ruling out spot welding; the common joining method during the past half century of automotive history. LÄS MER

  7. 5. Control of Cracking due to Imposed Strains in Concrete Structures

    Författare :Dan Pettersson; Avdelningen för Konstruktionsteknik; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; hydraulic engineering; Civil engineering; Friction.; Restraint; Shrinkage; Imposed deformations; Minimum reinforcement; Crack widths; Reinforced concrete; Crack development; Crack control; offshore technology; soil mechanics; Väg- och vattenbyggnadsteknik;

    Sammanfattning : This thesis is concerned with crack control due to imposed deformations in concrete structures. The objective of crack control may either be to prevent cracking or to limit the crack widths. The aim here is to increase the knowledge in both fields for some common structures. Five papers are included and the three last concern crack development. LÄS MER