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RISS 인기검색어
- 검색키워드
- 저자 : 양경부(Kyoung-Boo Yang) (검색결과 4 건)
- 무료
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박막/쉘 혼합요소의 판별조건과 강소성/탄소성 유한요소해석 적용에 관한 연구
정동원(Dong Won Jung),양경부(Kyoung Boo Yang) 한국해양공학회 1999 韓國海洋工學會誌 Vol.13 No.2
This study is concerned with the application of new criterion for membrane/shell mixed element in the rigid-plastic finite element analysis and elastic-plastic finite element analysis. The membrane/shell mixed element can be selectively adapted to the pure stretching condition by using membrane or a shell element in the bending effect areas. Thus, membrane/shell mixed element requires a efficient criterion for a distinction between membrane and shell element. In the present study introduce the criterion using the angle of between two element and confirm a generality of criterion from appling the theory to a rigid-plastic and elastic-plastic problems.
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박막/쉘 혼합요소를 이용한 박판성형 해석과 박막/쉘 판별조건에 관한 연구
정동원(Dong-Won Jung),양경부(Kyoung-Boo Yang) 한국해양공학회 1998 韓國海洋工學會誌 Vol.12 No.2
This study is concerned with criterion for membrane to shell conversion in two-dimensional elastic-plastic finite element analysis using membrane/shell mixed element. It is well known that in the sheet metal forming some parts of the sheet deform under almost pure stretching (membrane) conditions, whereas other parts in contact with sharp tooling surfaces can develop significant bending strains. The membrane analysis has a short computational time; however, in the membrane analysis the bending effects can not be condidered at all. On the other hand, the shell analysis allows the consideration of bending effects, but involves too much computational time. So Onate1),2), Yang et al3),4) develped the membrane/shell mixed element. Onate introduced the energy ratio parameter and Yang et al introduced the ratio of thickness to radius of curvature as the criterion. In the present study we propose a new criterion by using the angle between both side elements in the nodal point.
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정동원,양경부 濟州大學校 産業技術硏究所 1998 산업기술연구소논문집 Vol.9 No.1
The study is concerned with two-dimensional rigid-plastic finite element analysis of deep drawing process by using the continuum elements. The analysis of sheet metal forming process has three element types: membrane. shell and continuum element. The membrane analysis is frequently used due to the short computational time. However, in the membrane analysis the bending effects can not be considerde at all. The shell analysis allows the consideration of bending effects. but involves too much computational time then membrane analysis. The continuum analysis allows the consideration of realistic bending effects and calculated the accuracy thickness strain then the shell analysis in the sheet metal forming process . but involves an amount computational time. Therefore little analysis by using the continuum element. Recently, as a fast development of comuter hardware, this study carried out the analysis by using the continuum element in order to obtain the accuracy results
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정동원,양경부 濟州大學校 工科大學 産業技術硏究所 1998 尖端技術硏究所論文集 Vol.9 No.1
The study is concerned with two-dimensional rigid-plastic finite element analysis of deep drawing process by using the continuum elements. The analysis of sheet metal forming process has three element types: membrane, shell and continuum element. The membrane analysis is frequently used due to the short computational time. However, in the membrane analysis the bending effects can not be considerde at all. The shell analysis allows the consideration of bending effects, but involves too much computational time then membrane analysis. The continuum analysis allows the consideration of realistic bending effects and calculated the accuracy thickness strain then the shell analysis in the sheet metal forming process, but involves an amount computational time. Therefore little analysis by using the continuum element. Recently, as a fast development of comuter hardware, this study carried out the analysis by using the continuum element in order to obtain the accuracy results
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