강소성 변형 해석을 위한 최소 제곱 무요소법The Least-Squares Meshfree Method for the Analysis of Rigid-Plastic Deformation

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The least-squares formulation for rigid-plasticity based on J2-flow rule and infinitesimal theory and its meshfree implementation using moving least-squares approximation are proposed. In the least-squares formulation the squared residuals of the constitutive and equilibrium equations are minimized. Those residuals are represented in a form of first-order differential system using the velocity and stress components as independent variables. For the enforcement of the boundary and frictional contact conditions, penalty scheme is employed. Also the reshaping of nodal supports is introduced to avoid the difficulties due to the severe local deformation near the contact interface. The proposed least-squares meshfree method does not require any structure of extrinsic cells during the whole process of analysis. Through some numerical examples of metal forming processes, the validity and effectiveness of the method are investigated.
Publisher
대한기계학회
Issue Date
2004-12
Language
Korean
Citation

대한기계학회논문집 A, v.28, no.12, pp.2019 - 2031

ISSN
1226-4873
URI
http://hdl.handle.net/10203/84463
Appears in Collection
ME-Journal Papers(저널논문)
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