Search for dissertations about: "sandwich tests"

Showing result 1 - 5 of 11 swedish dissertations containing the words sandwich tests.

  2. 1. Wrinkling of sandwich panels for marine applications

    Author : Linus Fagerberg; KTH; []
    Keywords : wrinkling; local buckling; imperfection; stability; anisotropy; sandwich;

    Abstract : The recent development in the marine industry with largerships built in sandwich construction and also the use of moreadvanced materials has enforced improvements of design criteriaregarding wrinkling. The commonly used Hoff’s formula isnot suited for the highly anisotropic fibre reinforced sandwichface sheets of today. READ MORE

  4. 2. Foam Core Materials for High Performance Sandwich Constructions: Preparation, Testing and Properties

    Author : Mikael Danielsson; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; IPN; core material; low temperature; polyurea; polyethersulfone; gradient structure; foam; PVC; sandwich; waste; fire; smoke; toxicity; mechanical properties; Inter Penetrating Polymer Network; dynamic properties; high temperature;

    Abstract : The basic task for foams used as core materials in sandwich constructions is to separate the skin layers in order to enhance stiffness with little contribution to the total weight. However, modern design in sandwich technology require that core materials contribute to the perfor-mance with specific mechanical and physical properties. READ MORE

  5. 3. Laser-welded corrugated core steel sandwich bridge decks

    Author : Peter Nilsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fatigue; steel sandwich; Bridge deck; corrugated core; laser-weld;

    Abstract : Steel bridge decks are often used for applications when a lightweight structure is sought for. Conventional orthotropic steel decks suffers from drawbacks in several aspects, including high production costs and durability problems. READ MORE

  6. 4. Damage tolerance and residual strength of composite sandwich structures

    Author : Peter H. Bull; KTH; []
    Keywords : sandwich structure; damage tolerance; carbon fiber; compression after impact;

    Abstract : The exploitation of sandwich structures as a means toachieve high specific strength and stiffness is relatively new.Therefore, the knowledge of its damage tolerance is limitedcompared to other structural concepts such as truss bars andmonocoque plate solutions. Several aspects of the damage tolerance of sandwichstructures are investigated. READ MORE

  7. 5. Fatigue crack initiation and propagation in sandwich structures

    Author : Magnus Burman; KTH; []
    Keywords : TECHNOLOGY; TEKNIKVETENSKAP;

    Abstract : The focus throughout this thesis is on the fatigue characteristics of core materials used insandwich structures. Three sandwich configurations are investigated, two with cellular foamsand one with honeycomb core material These corresponds to typical materials and dimensionsused in the marine and aeronautical industry. READ MORE