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Browsing by Subject "damage"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Modelling of damage evolution in adhesive metal-composite structures for various joint designs
    (2011) Končakova, Nataliâ Aleksandrovna; Müller, Ralf; Barth, Franz Josef
    A viscoelastic model with the Lemaitre-type damage is applied to simulate the mechanical behaviour of the contact zone of an adhesive aluminum/fiber-reinforced polymer specimen. The damage evolution in this light weight engineering structure is investigated. The joints of aluminium alloy 5754 (AA5754) and carbon fibre reinforced thermoplastic composite CF-PA66 are manufactured by means of adhesion with an epoxy (1K-EP). The contact zone is considered as an interface material. The aim of the research is to study the influence of the interface geometry on the mechanical characteristics of the structure. The finite element method is used to simulate the complex processes in the joint. The aluminium substrate is modeled as an elastoplastic continuum with linear (isotropic) hardening. The polymer composite possesses an orthotropic elastic behaviour. A solid interface approach is used for the discretisation of the damage domain. It is shown that damage evolution depends on the geometry of the interface. The present work contains the numerical analysis of fracture processes in adhesive specimens with square, rectangular- and circle-shaped geometry of the joint.
  • thumbnail.journal.alt
    Item type:Thesis, Access status: Restricted ,
    Ocena wpływu na środowisko projektowanej drogi ekspresowej S7 na odcinku Miechów - Widoma
    (Data obrony: 2011-09-28) Furgalski, Tomasz
    Wydział Geologii, Geofizyki i Ochrony Środowiska
    The aim of this master's dissertation is the impact assessment of the proposed Expressway S7, over a distance of Miechów – Widoma on the environment. After the assessment of the current state of the environment, the forecast of the influence of the investment on specific components was made. As a result, it was proven that noise would bring most damage to the area. Air, aquatic environment, infrastructure and living organisms will be affected less seriously, however significantly. The influence of waste will be negligible if correctly managed. The investment will bring many benefits such as: free flow of traffic, reduction of the number of road collisions and shortening of travel time. States of emergency, which can endanger e.g., watercourses, were described. What is more, ways of minimizing the negative effects on the environment were presented in the MA paper.