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Numerical Analysis of Cyclic Deformation of Polymer Foam Film Using Stretched Truncated Octahedron Model  

Yoo, Ui-Kyung (Department of Mechanical Engineering, Chung-ang Univ.)
Lee, Young-Seog (Department of Mechanical Engineering, Chung-ang Univ.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.27, no.3, 2010 , pp. 104-110 More about this Journal
Abstract
Cyclic deformations of polymer foam film are simulated using the finite element method. Material of polymer foam film is polypropylene (PP). The calculated polymer foam film is micro-scale thin film has cellular structure. The polymer foam film is used in ferro-electret applications. The polymer foam film is idealized to one cell structure as lens shaped stretched truncated octahedron model. Cyclic deformation is performed by uniaxial stretching. Stretching direction is perpendicular to plane of cellular film. Various cyclic strain amplitudes, pore wall thicknesses, pore shape are investigated to find deformation tendency of cellular structure. Consequently, cellular structure has various macroscopic stresses on cyclic deformation with various pore thickness and pore shape.
Keywords
Polymer Foam Film; Bergstrom-Boyce Model; Stretched Truncated Octahedron Model; Polymer Electrets;
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