Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
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G. Ausias
Abstract
A calculation of fiber orientation of reinforced thermoplastics in two tube die geometries is presented. The flow field and fiber motion are calculated using coupled anisotropic constitutive equation and equation of change for fiber orientation. A finite element method is used for the flow field computation, and a simplified characteristic method for the fiber orientation. Results show that fibers orient parallel to the tube axis in a classical die of constant radius in the final land whereas fibers have a more isotropic orientation in a die with a final divergent land. Experimental observations and quantification of fiber orientation in reinforced thermoplastic tubes extruded with the two dies are presented. Results of the calculation agree well with the experimental data for the classical die. For the diverging die, the agreement is good at the tube surface, but the calculation underestimates the degree of orientation perpendicular to the tube axis in the core of the tube.
© 1994, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Ninth in a Series: Mitsubishi Heavy Industries: Road to a High Technology Giant
- Internal Mixers
- Two-Dimensional Dynamic Study of the Distributive Mixing in an Internal Mixer
- Screw Extrusion
- Design of Tightly Intermeshing Co-Rotating Twin Screw Extruders
- Devolatilization of Polymer Solutions
- Flow Mechanisms, Material Distributions and Phase Morphology Development in a Modular Intermeshing Counter-Rotating Twin Screw Extruder of Leistritz Design
- 3-D Flow Simulations of a Cavity Transfer Mixer
- Die Extrusion
- Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
- Fiber Spinning
- Orientation Evolution in Convergent-Divergent Dies
- Molding
- Unsteady Flow of Semi-Concentrated Fiber Suspensions in Compression Molding
- Equation of State for Pure Polymeric Fluids Theory Based on An Improved Hole and Cell Model
- Residual Stresses in Quenched and Injection Moulded Products
- Image Simulation and Evaluation of Fiber Orientation Distribution
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Ninth in a Series: Mitsubishi Heavy Industries: Road to a High Technology Giant
- Internal Mixers
- Two-Dimensional Dynamic Study of the Distributive Mixing in an Internal Mixer
- Screw Extrusion
- Design of Tightly Intermeshing Co-Rotating Twin Screw Extruders
- Devolatilization of Polymer Solutions
- Flow Mechanisms, Material Distributions and Phase Morphology Development in a Modular Intermeshing Counter-Rotating Twin Screw Extruder of Leistritz Design
- 3-D Flow Simulations of a Cavity Transfer Mixer
- Die Extrusion
- Flow and Fiber Orientation Calculations in Reinforced Thermoplastic Extruded Tubes
- Fiber Spinning
- Orientation Evolution in Convergent-Divergent Dies
- Molding
- Unsteady Flow of Semi-Concentrated Fiber Suspensions in Compression Molding
- Equation of State for Pure Polymeric Fluids Theory Based on An Improved Hole and Cell Model
- Residual Stresses in Quenched and Injection Moulded Products
- Image Simulation and Evaluation of Fiber Orientation Distribution
