Two-dimensional crack analysis using the extended finite element method with polynomial enrichment technique = 다항식 강화 기법이 적용된 확장유한요소법을 이용한 2차원 균열 해석

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Extended Finite Element Method / General Finite Element Method is one of the most commonly used methods for crack analysis. This method does not require re-meshing as the crack propagates by enriching the displacement field by the partition of unity method. However, the mesh refinement process near the crack tip is still necessary to obtain a satisfactory solution. Recently, research was proposed to solve the linear dependence problem using the 2-D 4-node quadrilateral elements and to improve the solution through polynomial enrichment technique. In this thesis, a polynomial enrichment technique that resolves the linear dependence problem is applied to the Extended Finite Element Method using the 2-D 4-node quadrilateral elements. As a result, a method that does not require a mesh refinement process is proposed. In addition, an efficient adaptive local enrichment technique is proposed through the Zienkiewicz-Zhu error estimator in terms of degrees of freedom. Verification of the proposed method is performed through several fracture mechanics numerical examples.
Advisors
Lee, Phill-Seungresearcher이필승researcher
Description
한국과학기술원 :기계공학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(석사) - 한국과학기술원 : 기계공학과, 2018.2,[v, 61 p. :]

Keywords

XFEM▼aGFEM▼acrack analysis▼afracture mechanics▼apartition of unity; 확장유한요소법▼a일반유한요소법▼a균열해석▼a파괴역학▼a단위분할법

URI
http://hdl.handle.net/10203/265929
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=733703&flag=dissertation
Appears in Collection
ME-Theses_Master(석사논문)
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