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논문 기본 정보

자료유형
학술대회자료
저자정보
M. Sahli (Femto-st Institute) T. Barrière (Femto-st Institute) J-C Gelin (Femto-st Institute)
저널정보
한국소성·가공학회 기타자료 NUMIFORM 2010
발행연도
2010.6
수록면
651 - 658 (8page)

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The geometrical and material properties of polymer components made by polymer hot embossing are largely affected by the embossing pressure and temperature, and depend on physical properties of considered polymers as well as on cavity shapes and roughness. The present paper is focussed on experiments and numerical simulations of the hot embossing processes consisting in the replication of polymers plates on engraved shapes in the metallic plates that are used for the tests. The numerical simulations of the embossing process are realized for 2D or 3D geometries, and provide the way to access to the pressure on the polymer substrate, as a function of the viscosity of the polymers under given pressure and temperature conditions. The ability of the process to fill the cavities depends on the viscoelastic and viscoplastic properties of the polymers, for the temperature and strain range considered. In the proposed analysis consisting of the micro-indentation of the polymer plate, axisymmetric and 3D FE models are used to analyse the cavity filling capabilities vs. strain rates, strains and temperature contours. The comparison between the experimental results and the results from FE simulations reveal that the flows patterns, final geometry of the filled cavities as well applied loads are qualitatively similar to the results obtained from experiments under isothermal conditions.

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Abstract
FINITE ELEMENTS MODEL
EXPERIMENTAL METHOD
RESULTS AND DISCUSSIONS
CONCLUSIONS
REFERENCES

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