The SMC(Sheet molding compound) process is widely used in the automotive industry to produce parts that are large, thin, lightweight, strong and stiff. Compression molded parts are formed by squeezing a glass fiber reinforced UP(Unsaturated Polyester) sheet, known as sheet mold compound(SMC), between two heated cavity surfaces. This paper has performed flow analysis to predict optimization process of low density SMC. After five types of design variables and six types of response variables were defined, DOE(Design of Experiment) and RSM (Response Surface Method) were applied in order to measure sensitivity of design variables and realize optimization through regression model. After design optimization, the total warpage of the SMC is reduced by about 12% compared to the initial design of SMC and cure time, cure temperature, clamping force and flow pressure are decreased by 0.6∼27% in comparison with the initial design. By doing this, the production costs could be diminished.

Abstract
 1. 서론
 2. 재료특성 및 유동해석 조건
  2.1 저비중 SMC의 개요
  2.2 유동해석의 실험계획법 설정
  2.3 실험계획법 결과분석
  2.4 최적화 해석 결과 및 비교
 3. 결론
 참고문헌

• 김은성(전주비전대학교 자동화기계과) | E. S. Kim