# Three-Dimensional Flow Analysis for Compression Molding of Unidirectional Fiber-Reinforced Polymeric Composites with Slip Between Mold and Material

• 윤두현 (국민대학교 기계.자동차공학부) ;
• 조선형 (동서울대학교 금형설계과) ;
• 김이곤 (국민대학교 기계.자동차공학부)
• 발행 : 1999.07.01
• 48 7

#### 초록

The family of unidirectional continuous fiber reinforced polymeric composites are currently used in automotive bumper beams and load floors. The material properties and mechanical characteristics of the compression molded parts are determined by the curing behavior, fiber orientation and formation of knit lines, which are in turn determined by the mold filling parameters. In this paper, a new model is presented which can be used to predict the 3-dimensional flow under consideration of the slip of mold-composites and anisotropic viscosity of composites during compression molding of unidirectional fiber reinforced thermoplastics for isothermal state. The composites is treated as an incompressible Newtonian fluid. The effects of longitudinal/transverse viscosity ratio A and slip parameter $\alpha$ on the buldging phenomenon and mold filling patterns are also discussed.

#### 키워드

일방향 섬유강화 플라스틱 복합재;압축성형;미끄럼 지배상수;이방성 점도비;유한요소법을 이용한 3차원 유동해석