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J. Ocean Eng. Technol. 2003;17(5):66-75.    

Finite Element Analyses of Cylinder Problems Using Pseudo-General Plane Strain Elements(Planar Constraint)
KWON YOUNG-DOO;KWON HYUN-WOOK;SHIN SANG-MOK;LEE CHAN-BOK;
School of Mechanical Engineering, Kyungpook National University;School of Mechanical Engineering, Kyungpook National University;School of Mechanical Engineering, Kyungpook National University;Korea Atomic Energy Research Institute;
유사 평면변형률 유한요소를 사용한 실린더 문제의 해석
권영두;권현욱;신상목;이찬복;
경북대학교 기계공학부;경북대학교 기계공학부;경북대학교 기계공학부;한국원자력연구소;
© 2003 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
핵심용어: Long Cylinder 긴실린더, Plane Strain 평면변형률, Periodic Structure 주기적 구조, Representative Displacement 대표변위, Axisymmetric Condition 축대칭 상태, Asymmetric Condition 비축대칭 상태, Uniform Strain 일정변형률
Abstract
Long cylinder, subjected to internal pressure, is important in the analysis and design of nuclear fuel rod structures. In many cases, long cylinder problems have been considered as a plane strain condition. However, strictly speaking, long cylinder problems are not plane strain problems, but rather a general plane strain (GPS) condition, which is a combination of a plane strain state and a uniform strain state. The magnitude of the uniform axial strain is required, in order to make the summation of the axial force zero. Although there has been the GPS element, this paper proposes a general technique to solve long cylinder problems, using several pseudo-general plane strain (PGPS) elements. The conventional GPS elements and PGPS elements employed are as follows: axisymmetric GPS element (GA3), axisymmetric PGPS element (PGA8/6), 2-D GPS element (GIO), 3-D PGPS element (PG20/16), and reduced PGPS elements (RPGA6, RPG20/16). In particular, PGPS elements (PGA8/6, PG20/16) can be applied in periodic structure problems. These finite elements are tested, using several kinds of examples, thereby confirming the validity of the proposed finite element models.
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