The modelling of rubber materials in industrial applications is often carried out by experimental analysis. The company Saab Automobile AB in Trollhättan has assigned the task of simulating the transportation of vibration and noise from the engine of a car to the surrounding structures. The vibration and noise is reduced by the use of vibration dampers made of rubber. The damper is designed as two

This master thesis describes nonlinear nite element analysis and ex- perimental verication tests of a corrugated board panel when loaded in-plane. Detailed modelling of a panel, where both the liner and fluting is represented in detail, is compared to simplied shell modelling with a solid core and to experimental tests. In the experimental tests, Stereo- scopic Digital Speckle Photography is used t

A low creep rate and a long lifetime are important mechanical properties for corrugated board and its constituent’s linerboard and fluting. These properties ensure that the package protects the goods during the entire duration of transport and storage. This study involves several creep and tensile tests of linerboard in the machine direction (MD). The objective is to investigate how free or rest

This master dissertation describes the process of implementing a coupling between the boundary element method (BEM) and the finite element method (FEM) for three dimensional time harmonic structure-acoustic models in CALFEM, which is a finite element toolbox to MATLAB. Since no boundary elements earlier have been represented in CALFEM the development and implementation of constant and linear boundar

This master’s thesis relates to the design of prefabricated balconies. Such balconies are often designed in different ways. A separate investigation of what is technically possible regarding, among other things, supports and balcony sizes must often be performed in every project involving balconies. Three kinds of solutions are presented. These are tie rod, cantilever and column supported balconie

Within the automotive industry today, companies save significant amounts of money through computer simulations. Mathematics through numerical methods becomes important when as in this case the investigation is done with the Finite Element Method (FEM). A self-pierced rivet (SPR) joint specimen in a T-peel case is studied. The specimen consists of 1.15 mm thick steel sheets with a rivet of 5 mm in

A geometry model for three dimensional fibre networks is proposed. The geometry model is intended to be a part of a system, where data from a computer tomography of a fibre material can be fitted to the geometry model and from there, be evaluated according to key parameters such as fibre length, fibre orientation angles and radii of curvature. The model is also intended to give the geometry foundation

In this master thesis a two-dimensional finite element model describing nonlinear moisture dynamics in paper materials is developed. The aim of the model is to simulate moisture movement in corrugated board boxes due to fluctuating relative humidity. To evaluate the accuracy of the model a simulation is carried out which is being compared to measurements. For the paper material used in the simulati

When birds move around in their natural environment the feathers on the wings are exposed to various factors that reduce their performance, such as UV-radiation, mechanical wearing and bacteria. In time the feathers get worn out and are replaced. This usually happens once a year by a process called moult. Some bird species differs from this pattern and moult twice a year. This behavior may have infl