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 (다공성 폴리머 박막),Bergstrom-Boyce Model (벅스트롬-보이스 모델),Stretched Truncated Octahedron Model (모서리가 제거된 팔면체 인장모델),Polymer Electrets (폴리머 일렉트릿)