Sökning: "Constitutive relations"

Visar resultat 16 - 20 av 57 avhandlingar innehållade orden Constitutive relations.

1. 16. Multiscale modeling of ductile fracture in solids

   Författare :Erik Svenning; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Ductile fracture occurs in many situations of engineering relevance, for example metal cutting and crashworthiness applications, where the fracture process is important to understand and predict. Increased understanding can be gained by using multiscale modeling, where the effective response of the material is computed from microscale simulations on Statistical Volume Elements (SVEs) 1 containing explicit models for the nucleation and propagation of microscopic cracks. LÄS MER

3. 17. Elastoplasticity of Grey Cast Iron FE-Algorithms and Biaxial Experiments

   Författare :Hans E. Hjelm; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Biaxial experiments; multiaxial elastoplastic behaviour; graphite flakes; FE-codes; hardening behaviour; graphitic grey cast iron;

   Sammanfattning : This thesis focuses on multiaxial elastoplastic behaviour of graphitic grey cast iron with the aim to provide physically appropriate and numerically reliable constitutive relations for use in FE-codes. To achieve this goal, this work is divided into three parts: Biaxial experiments are performed on thin cruciform specimens. LÄS MER

4. 18. Modeling of Elasticity and Damping for Filled Elastomers

   Författare :Per Erik Austrell; Byggnadsmekanik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; rheological models; contact-free strain measurement; modified hardness test; solid dumbbell test specimen; mechanical conditioning; strain energy plot; hyperelasticity; carbon-black-filled rubbers; amplitude dependence; multiaxial viscoplastic model; Building construction; Byggnadsteknik;

   Sammanfattning : Elasticity and damping are significant properties of rubber, taken advantage of in engineering applications. It is therefore important that the constitutive model accurately captures these aspects of the mechanical behavior. LÄS MER

5. 19. A Damage-Based Interface Model: Application to the Degradation and Failure of a Polycrystalline Microstructure

   Författare :Patrik Cannmo; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; damage; polycrystalline microstructure; degradation; slip and dilatation; interfaces; FE-calculations; viscoplasticity; plasticity; failure;

   Sammanfattning : A constitutive model for material interfaces is presented. The model is based on damage coupled to plastic (or viscoplastic) slip and dilatation, and it is able to describe the successive degradation and failure of an interface. LÄS MER

7. 20. Situated Freedom : Exploring the Aesthetic Practice of Rem Koolhaas/OMA

   Författare :Katja Hogenboom; Helena Mattsson; Sven-Olov Wallenstein; Helene Frichot; Robert Somol; KTH; []
   Nyckelord :HUMANIORA; HUMANITIES; Situated Freedom; Assemblage; Fabulation; Any-Space-Whatever; Irrational Cut; Time-Image; Montrage; Non-Object; Theatre of Variation; Power of the False; Politics of Aesthetics; Messy Method; Aesthetic Practice; Rem Koolhaas; OMA; China Central Television Headquarters; Seattle Central Library; Villa dall’Ava; Maison à Bordeaux.; Arkitekturens historia och teori; History and Theory of Architecture;

   Sammanfattning : The thesis advocates that architecture can, as an operative medium, situate freedom. Following the work of Michel Foucault, the thesis develops an argument for an emancipatory endeavor, termed “situated freedom in architecture. LÄS MER