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http://dx.doi.org/10.7234/kscm.2011.24.4.041

A study on structure analysis system for short fiber reinforced plastics  

Youn, Jee-Young (현대자동차)
Kim, Sang-Woo (현대자동차)
Park, Bong-Hyun (현대자동차)
Lee, Seong-Hoon (현대자동차)
Kwon, Tai-Hun (포항공과대학교, 기계공학과)
Kim, Ki-Tae (포항공과대학교, 기계공학과)
Publication Information
Composites Research / v.24, no.4, 2011 , pp. 41-47 More about this Journal
Abstract
This paper deals with anisotropic property and structural analysis for short fiber reinforced plastic composites manufactured by the injection molding process. The common approach for modeling this type of material is the consideration of the material as homogenous and isotropic. However, the common isotropy approach often results in unexpected failure. To overcome this, new structure analysis methodology was developed in order to consider fiber orientation effect using injection mold flow analysis and Halpin-Tsai equations for unidirectional composites and taking an orientation average. The numerical predictions are compared to experimental data for tensile specimen. The predicted mechanical properties agree well with experimental data for fiber orientation and weld line effect. The analysis system was also applied to an automobile part. The proposed anisotropic model predicted different mechanical properties by position of the part and different mechanical performance of the part was changed according to injection gate position.
Keywords
Short fiber reinforced plastics; Fiber orientation; Injection molding; Structure analysis;
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  • Reference
1 F. Folgar and C. L. Tucker III, "Orientation behavior of fibers in concentrated suspensions" J. Reinf. Plast. Compos. 3, 1984, pp. 98-119.   DOI   ScienceOn
2 Abaqus v6.5,User's Manual. Abaqus Inc., Providence, RI, USA.
3 강명석, 윤성기, "단섬유 복합재료의 거동에 대한 확률 유한 요소 해석", 한국복합재료학회지, 제6권 제2호 1993, pp. 80-86.
4 C. L. Tucker III, "Flow regimes for fiber suspensions in narrow gaps", J. Non-Newtonian Fluid Mech. 39, 1991, pp. 239-269.   DOI   ScienceOn
5 MPI 5.0. Moldflow corporation. Framingham, MA, USA.
6 J. C. Halpin and S. W. Tsai, "'Effects of environmental factors on composite materials", AFML-TR-67-, 1969.
7 R. M. Jones, ''Mechanics of composite materials", McGraw-Hill, 1975.
8 S. T. Chung and T. H. Kwon, "Numerical simulation of fiber orientation in injection molding of short-fiber-reinforced thermoplastics", Polym. Eng. Sci. 35, 1995, pp. 604-618   DOI   ScienceOn
9 고진, 이석원, 윤재륜, "단섬유 복합재료의 사출 성형을 위한 평면방향의 섬유 배열 해석", 한국복합재료학회지, 제8권 제4호, 1995, pp. 34-45.
10 S. G. Advani and C. L. Tucker III, "The use of tensors to describe and predict fiber orientation in short fiber composites", J. Rheol. 8, 1987, pp. 751-784.
11 G. B. Jeffery, "The motion of ellipsoidal particles immersed in a viscous fluid", Proc. R. Soc. London, Ser. A 102, 1922, pp. 161-179.   DOI