Variable-node finite elements for elasto-plastic analysis = 탄소성 해석을 위한 변절점 유한요소

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In this thesis, variable-node elements (VNEs) based on the cell-based smoothed finite element method (CSFEM) are proposed with emphasis on their applications for elasto-plastic finite deformation. The formulation of CSFEM is extended to cover elastic-plastic deformations beyond the classical linear theory of elasticity, which has been the major application domain of smoothed finite elements. The finite strain deformations are treated with the aid of the formulation based on the hyperelastic constitutive equation. The volumetric locking originating from the nearly incompressible behavior of elasto-plastic deformations is remedied by relaxing the volumetric strain through the mean value. In addition, the existing VNEs limited to linear elastic analysis is extended to analysis of elasto-plastic deformations with the aid of CSFEM. The comparison with the conventional finite elements and Abaqus demonstrates the effectiveness and accuracy of the present approach.
Advisors
Im, Se-Youngresearcher임세영
Description
한국과학기술원 : 기계공학전공,
Publisher
한국과학기술원
Issue Date
2014
Identifier
591722/325007  / 020085301
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 기계공학전공, 2014.8, [ viii, 103 p. ]

Keywords

Variable-node elements; 초탄성; 대변형; 탄소성; 완화 유한요소법; 변절점 유한요소; Cell-based smoothed finite element method; Elasto-plasticity; Finite deformation; Hyperelasticity

URI
http://hdl.handle.net/10203/197473
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=591722&flag=dissertation
Appears in Collection
ME-Theses_Ph.D.(박사논문)
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