Filtyp
In this report the behaviour of paper reinforced plastics known as High Pressure Laminates, HPL, is studied. The material is regarded as anisotropic. Young’s modulus, Poisson’s ratio, shear modulus and the in-plane moisture elongations are measured. Calculation of moisture induced deformations and forces are carried out, both for beam and plate theory.
This master’s thesis describes methods of calculating deformations of large astronomical telescope mirrors caused by the mirror support system. In the first part of the report these calculation methods are derived, along with methods of optimizing a support system pattern. Both analytical and numerical methods are described in the case of deformation analysis, and methods based on probabilistic me
The purpose of this Master’s thesis has been to establish a method with which the stochastic field for the hydraulic conductivity within an aquifer can be determined. The stochastic field is characterised by the mean value and the standard deviation of the hydraulic conductivity together with a selected statistical distribution and the correlation between different points within the aquifer. The a
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
