Sökning: "cut finite element method"

Visar resultat 21 - 25 av 30 avhandlingar innehållade orden cut finite element method.

1. 21. Parallel Numerical Procedures for the Solution of Contact-Impact Problems

   Författare :Per Persson; Karl Schweizerhof; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Finite element (FE) simulations of complex problems tend to yield very large models if detailed knowledge of the problem is required. As the model becomes larger, the time needed for solving the problem increases. The solution time is even longer if contact is present in the model. LÄS MER

3. 22. Prediction of rock failures in mines, with application to the Näsliden mine in northern Sweden

   Författare :Torgny Borg; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

   Sammanfattning : Continous cut and fill mining will cause increased loading of the roof of the stopes in mining operations. The aim of the present work is to predict what mining levels will induce critically large loads in the roof of the stopes in cut and fill mining and in particular the Näsliden Mine, in Northern Sweden. LÄS MER

4. 23. FRP strengthening of concrete walls with openings

   Författare :Cosmin Popescu; Joaquim António Oliviera de Barros; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

   Sammanfattning : The thesis deals with the axial strength of axially and eccentrically loaded concrete walls with cut-out openings strengthened by fiber-reinforced polymers (FRPs).Background: Functional modifications of concrete structures are common because existing structures must often be adapted to comply with current living standards. LÄS MER

5. 24. Numerical analysis of concrete elements strengthened with carbon fiber reinforced polymers

   Författare :Joakim Lundqvist; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Engineering; Konstruktionsteknik;

   Sammanfattning : Due to the growing number of ageing reinforced concrete structures such as buildings and bridges, there is an increasing interest in condition assessment and strengthening methods. Deterioration processes and demands for higher loads contribute to this interest. LÄS MER

7. 25. All-fiber modulators for laser applications

   Författare :Mikael Malmström; Fredrik Laurell; Simon Fleming; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; All-fiber; fiber optics; modulation; q-switching; mode-locking;

   Sammanfattning : The objective of this thesis was to explore the usefulness of all-fiber modulators for laser applications. The modulators were all based on refractive index change achieved in the core of the studied fiber- components, exploiting either the elasto-optic effect or the electro-optic effect. LÄS MER