한국소성가공학회:학술대회논문집 (Proceedings of the Korean Society for Technology of Plasticity Conference)
- 한국소성가공학회 2007년도 추계학술대회 논문집
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- Pages.258-261
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- 2007
사출성형 냉각조건이 열에 의한 복굴절에 미치는 영향
Influences of Cooling Conditions on the Thermally-Induced Birefringence in Injection Molding
- 이호상 (충주대학교 항공.기계설계학과) ;
- Lee, H.S. ;
- Isayev, A.I. (Institute of Polymer Engineering, University of Akron)
- 발행 : 2007.10.11
초록
Simulations of the thermally-induced residual stresses and birefringence in freely quenched plates of polycarbonate were performed by using the linear viscoelastic and photoviscoelastic constitutive equations for the mechanical and optical properties, respectively, and the first order rate equation for volume relaxation. The predictions for the birefringence showed good agreement with experimental measurements. Based on the simulation, the influences of various cooling conditions on the residual stress and birefringence in plates were investigated. The residual stress and birefringence increased with increasing initial temperature, decreasing coolant temperature and increasing heat transfer coefficient of coolants.