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Found 5 essays matching the above criteria.

1. 1. Reissner Mixed Variational Theorem for Ritz Sublaminate Generalized Unified Formulation

   University essay from KTH/Lättkonstruktioner

   Author : Pier Antonio Esposito; [2021]
   Keywords : Mechanics; FEM; Ritz; Reissner; Stress; deformations; composite materials; Mekanik;

   Abstract : This thesis is about the development of a new numerical method for the analysis of composite shells. The present work is based on Reissner Mixed Variational Theorem (RMVT), the Sublaminate Generalized Unified Formulation (S-GUF), and the Ritz approximation. READ MORE

3. 2. Implementation and validation of an isogeometric hierarchic shell formulation

   University essay from KTH/Bro- och stålbyggnad

   Author : Michael Loibl; [2019]
   Keywords : Isogeometric Analysis; Shell; Locking; Kirchho-Love; Reissner-Mindlin; Three-Dimensional Shell I;

   Abstract : Within this thesis, thin walled shell structures are discussed with modern element formulationsin the context of the Isogeometric Analysis (IGA). IGA was designed to achieve a directinterface from CAD to analysis. According to the concept of IGA, Non-Uniform RationalB-Splines (NURBS) are used as shape functions in the design and the analysis. READ MORE

4. 3. Decay of solutions to the Klein-Gordon equation on some expanding cosmological spacetimes

   University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation

   Author : Amol Sasane; [2019]
   Keywords : Klein-Gordon equation; general relativity; FLRW models; Schwarzschild-de Sitter; Reissner-Nordström-de Sitter; Physics and Astronomy;

   Abstract : The decay of solutions to the Klein-Gordon equation is studied in two expanding cosmological spacetimes, namely (1) the de Sitter universe in flat Friedmann-Lemaitre-Robertson-Walker (FLRW) form, and (2) the cosmological region of the Reissner-Nordström-de Sitter (RNdS) model. Using energy methods, for initial data with finite higher order energies, bounds on the decay rates of the solution are obtained. READ MORE

5. 4. The Reissner-Nordström metric

   University essay from Umeå universitet/Institutionen för fysik

   Author : Jonatan Nordebo; [2016]
   Keywords : ;

   Abstract : A brief review of special and general relativity including some classical electrodynamics is given. We then present a detailed derivation of the Reissner-Nordström metric. The derivation is done by solving the Einstein-Maxwell equations for a spherically symmetric electrically charged body. The physics of this spacetime is then studied. READ MORE

6. 5. Modelling of failure mechanisms for corrugated board.

   University essay from KTH/Hållfasthetslära (Inst.)

   Author : Mohamed Haidar; [2015]
   Keywords : paper; corrugated paperboard; FEM; experiments; testing; transverse shear; buckling; energy relations; Reissner-Mindlin;

   Abstract : The present work describes the construction of a semi-analytical model for prediction of buckling loads in simply supported corrugated paperboard panels. The model accounts for transverse shear, due to the weakness of the core in such plates compared to the facings. This was done utilizing energy relations and rst order transverse shear. READ MORE