The statistically modified laminate model for fiber reinforced injection moldings -- A practical way to get flow and structural analysis packages on friendly terms
- Kobe Steel Ltd. (Japan)
The fibers in injection molded FRP provide the material`s strength and stiffness; however, they also supply many of the problems. Preferential orientation of fibers during molding can reduce strength and stiffness below the expected values in critical directions, or induce warpage in thin walled sections. Firms involved in the manufacture of short fiber reinforced injection molded products typically make extensive use of computer aided engineering packages to optimize product performance and determine a suitable manufacturing approach. However, different programs have different strengths, and the structural module of flow analysis packages is often analysis lite; a basic package with many essential features missing. This paper describes FLOWMOST, FLOW MOdified STructure, an analysis system the authors have developed that provides an interface between flow modeling and structural analysis, allowing the effects of anisotropy in mechanical properties due to fiber orientation to be examined using a full featured finite element code. The analysis uses laminate theory, modified by fiber distribution statistics. However, it is not a black box, and its exact operation can easily be modified. After verification using simple testpiece geometries, they have used this system to examine a wide variety of consumer products. The eventual aim is to turn the effects of fiber orientation in injection molding into features they design for, rather than unwanted hazards they design against.
- OSTI ID:
- 392410
- Report Number(s):
- CONF-9602107-; TRN: IM9647%%264
- Resource Relation:
- Conference: 51. annual conference and expo for Composite Institute, Cincinnati, OH (United States), 5-7 Feb 1996; Other Information: PBD: 1996; Related Information: Is Part Of Composites Institute`s 51. annual conference and expo `96: Proceedings; PB: 700 p.
- Country of Publication:
- United States
- Language:
- English
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