원형컵 디프드로잉에서의 주름발생해석Analysis of Wrinkling INitiation and Growth in Cylindrical Cup Deep Drawing Process

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The wrinkling of thin sheet metal induced by compressive instability is one of major defects in sheet metal forming processes. compressive instability is influence by many factors such as mechanical properties of the sheet material geometry of the sheet contact conditions and plastic anisotropy. The analysis of compressive instability in a plastically deforming body is rather difficult because the effects of the above-mentioned factors are rather complex and the instability behavior may show swide variations even for small deviations of the factors. in this work the bifurcation theory is introduced for the finite elemental analysis of the instability behavior of a thin sheet with initially sound geometry and property. All the above-mentioned factors are conveniently considered by the finite element method. The instability limit is found by introducing a criterion scheme into the incremental analysis and the post-bifurcation behavior is analyzed by introducing the branching scheme. Wrinkling initiation and growth in the deep drawing process are analyzed.
Publisher
한국소성가공학회
Issue Date
1999-09-01
Language
KOR
Citation

한국소성가공학회 추계학술대회, pp.18 - 21

URI
http://hdl.handle.net/10203/136994
Appears in Collection
ME-Conference Papers(학술회의논문)
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