Sökning: "elastic relations"

Visar resultat 1 - 5 av 37 avhandlingar innehållade orden elastic relations.

1. 1. Till studiet av relationer mellan familj, ekonomi och stat : Grekland och Sverige

   Författare :Lotta Coniavitis Gellerstedt; Anna-Karin Kollind; Stockholms universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Clientelism; elastic relations; European Union; family; Greece; informal economy; modernization; organizations; social landscape; Sweden; Sociology; sociologi;

   Sammanfattning : Within a loose framework of two ongoing and interrelated processes (globalisation and changing roles of the nation-state) family and relations between family, economy and state are studied in Greece and Sweden. Greece is in focus. Modernization, development and family in social science literature are discussed. LÄS MER

3. 2. Dynamic Anisotropic and Piezoelectric Plate Equations - A Power Series Approach with Recursion Relations among the Expansion Functions

   Författare :Karl Mauritsson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Piezoelectricity; Plate equations; Anisotropy; Plates; Recursion relations; Power series expansions; Thin layers; Hamilton s principle; Laminates;

   Sammanfattning : The subject of this thesis is dynamics of plates. Both anisotropic elastic plates, piezoelectric plates, thin piezoelectric layers on elastic plates and elastic laminates are considered. Piezoelectric materials are often used in sensors and actuators and common applications for these are vibration control and ultrasonic transducers. LÄS MER

4. 3. Guided Elastic Waves along Periodically Corrugated Structures

   Författare :Ahmed M. A. El-Bahrawy; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : The present thesis consider time-harmonic surface and guided elastic waves propagating along periodically corrugated structures. The problems discussed deal with various configurations where the surfaces are sinusoidally - singly or doubly - periodic, and the interest is focused on investigating the roots of the dispersion relations and in particular the stopband and cross-over resonances. LÄS MER

5. 4. Scattering of elastic waves by an anisotropic sphere

   Författare :Ata Jafarzadeh; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sphere; T matrix; Effective wave number; Distribution of inclusions; Phase velocity.; Anisotropy; Attenuation; Scattering;

   Sammanfattning : Scattering of a plane wave by a single spherical obstacle is the archetype of many scattering problems in physics and geophysics. Spherical objects can provide a good approximation for many real objects, and the analytic formulation for a single sphere can be used to investigate wave propagation in more complicated structures like particle composites or grainy materials, which may have application in non-destructive testing, material characterization, medical ultrasound, etc. LÄS MER

7. 5. Computational topology optimization of elastic continua by design restriction

   Författare :Thomas Borrvall; Linköpings universitet; []
   Nyckelord :;

   Sammanfattning : This thesis is concerned with theoretical and computational approaches in topology optimization of elastic continua. It consists of three papers.Paper I is a review of existing approaches for formulating and solving problems in topology optimization. LÄS MER