Sökning: "dynamic explicit"

Visar resultat 1 - 5 av 143 avhandlingar innehållade orden dynamic explicit.

1. 1. Adhesive joining for crashworthiness : material data and explicit FE-methods

   Författare :Thomas Carlberger; Högskolan i Skövde; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Adhesive joining; Dynamic fracture; Cohesive zone; Interphase Element; Bimaterial joining; Hybrid joints; Materials science; Teknisk materialvetenskap; Teknik; Technology;

   Sammanfattning : Today, crash simulations replace crash testing in the product development phase in theautomotive industry. High quality simulations enable shorter product development time andhigher competitiveness. LÄS MER

3. 2. Shear in Concrete Structural Elements Subjected to Dynamic Loads

   Författare :Johan Magnusson; Anders Ansell; Mikael Hallgren; Richard Malm; Jaap Weerheijm; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Dynamic load; initial response; shear failure; shear capacity; numerical simulations; bond; shear span; support reactions; Dynamisk last; initial respons; skjuvbrott; skjuvkapacitet; numeriska simuleringar; förankring; skjuvspännvidd; upplagsreaktioner; Civil and Architectural Engineering; Byggvetenskap;

   Sammanfattning : Concrete structural elements subjected to severe dynamic loads such as explosions at close range may cause shear failures. In the Oklahoma City bombing in 1995 two concrete columns on the ground level were reported to have failed in shear. LÄS MER

4. 3. Alternatives for Finite Element Analysis of Blade Forging

   Författare :Behzad Soltani; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; residual stresses; blade forging; flow approach; metal forming; quasistatic implicit; dynamic explicit; forging; solid approach; finite element method; closed die forging;

   Sammanfattning : This thesis is a theoretical and numerical study of the weaknesses and capabilities of alternative finite element procedures for simulation of the blade forging problem and also an analysis of the practical aspects of that process. An overview is presented of the finite element method for non-linear problems with elastoplastic constitutive relations, focusing on quasistatic implicit and dynamic explicit approaches. LÄS MER

5. 4. Approximate Dynamic Programming with Applications

   Författare :Andreas Wernrud; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : This thesis studies approximate optimal control of nonlinear systems. Particular attention is given to global solutions and to the computation of approximately optimal feedback controllers. The solution to an optimal control problem is characterized by the optimal value function. LÄS MER

7. 5. (De)coding Modality : The Case of Must, May, Måste and Kan

   Författare :Anna Wärnsby; Engelska; []
   Nyckelord :HUMANIORA; HUMANITIES; English language and literature; semiotics; syntax; modal verbs; modality; English-Swedish Parallel Corpus; epistemic; deontic; dynamic; indeterminacy; Controllability; Transitivity; Data Mining; pragmatics; Engelska språk och litteratur ; semantics; Grammar; Grammatik; semantik; semiotik;

   Sammanfattning : This study investigates the mechanisms of (de)coding modality, focusing on the interpretation of utterances containing the modals must, may, måste, and kan. The main research question posed in this study is what enables the interlocutors to interpret modal expressions so that communicative goals are achieved. LÄS MER