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Modeling the Dynamic Contact with Large Deformations Using the G-ALE-FEM Method

Mohajeri, Sina | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51579 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Khoei, Amir Reza
  7. Abstract:
  8. Contact between different parts of a system and their interactions on each other is one of the most important phenomena that we face in modeling a variety of mechanical issues which should be carefully considered. Sometimes, this phenomenon occurs between different components in a phase and some other times between several phases, which, causes changes in the performance and response of the system. Therefore, in order to investigate its effect in particular on dynamic problems that are subject to severe changes over a short period of time, and to provide more effective methods for dealing with it, the subject of this research has been devoted to dynamic contact modeling with large deformations. The problem of modeling the contact is commonly encountered by large deformations between objects at contact interface. The finite element method is considered as one of the most basic and most widely used numerical modeling methods in simulating the phenomenon with well-known problems. One of these problems is the dependency of the analysis to network near the contact region, which increases both numerical errors and a significant increase in the cost of the analysis. Other problems can be identified with concerns about the use of contact constraints using existing methods. In dynamic analysis, the problems of using finite element method are doubled and other types of errors in system responses are considered. In this research, after fundamental corrections, we have tried to extend the form of an improved finite element method, which in recent years has been of interest to many researchers, the dependence of the analysis on networking to the extent possible. Finally, by combining the work done with the desired Lagrangian-Eulerian point of view, a comprehensive model can be used to model the types of dynamic contact problems
  9. Keywords:
  10. Finite Element Method ; Modeling ; Dynamic Contact ; Large Deformation ; Generalized Arbitrary Lagrangian Eulerian - Finite Element Method (G-ALE-FEM)

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