Inverse Modeling of Injection Molding Thermal Stresses to Optimize Temperature and Pressure History
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Y. Farhoudi
Abstract
The dimensional stability and mechanical and optical properties of injection molded articles are affected to a large extent by the distribution of residual stresses. The distribution of residual stresses varies as a result of the temperature and pressure history during the process. In this paper, two thermoelastic models were used to study the effect of processing conditions on generation of thermal stresses. Then, based on these models, two inverse models were developed to calculate the unknown pressure history and initial melt temperature from a known residual stress distribution in the final product. The models were successfully tested with stress data simulated by the forward models. The effect of experimental errors on the inverse methods was investigated by adding random errors to the stress data. Finally, experimentally measured stress profiles were used to further test the inverse models. The results are presented and discussed.
© 1996, Carl Hanser Verlag, Munich
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Eighteenth in a Series: Toshiba Machine
- Screw Extrusion
- Theoretical and Experimental Investigations of the Melting of Pellets in Co-Rotating Twin-Screw Extruders
- An Improved Flow Simulation Model for a Tangential Counter-Rotating Twin Screw Extruder
- Modeling and Experimental Study of the Flow in a Simplified Cavity Transfer Mixer
- An Analytical Model of the Conveying Behaviour of Closely Intermeshing Co-rotating Twin Screw Extruders
- Reactive Processing
- Simulation of Continuous Polymerization in a Modular Intermeshing Co-rotating Twin Screw Extruder
- Reactive Blending in a Twin Screw Extruder
- Die Extrusion
- Viscoelastic Simulations of Stratified Bicomponent Extrusion through Slit Dies
- Fibers
- Spinnability of Polymer Melts – a Complex Problem in Basic Research1)
- Molding
- Structure and Properties of Inflation Films of β-Phase Nucleating Agent-Added Polypropylene
- Inverse Modeling of Injection Molding Thermal Stresses to Optimize Temperature and Pressure History
- An Assessment of Thermal Stresses in Injection Moulded ABS Copolymer
- Rapid Communications
- Experimental Study on the Injection Compression Molding of Parts with Precision Contours
Artikel in diesem Heft
- Contents
- Contents
- Editorial
- Eighteenth in a Series: Toshiba Machine
- Screw Extrusion
- Theoretical and Experimental Investigations of the Melting of Pellets in Co-Rotating Twin-Screw Extruders
- An Improved Flow Simulation Model for a Tangential Counter-Rotating Twin Screw Extruder
- Modeling and Experimental Study of the Flow in a Simplified Cavity Transfer Mixer
- An Analytical Model of the Conveying Behaviour of Closely Intermeshing Co-rotating Twin Screw Extruders
- Reactive Processing
- Simulation of Continuous Polymerization in a Modular Intermeshing Co-rotating Twin Screw Extruder
- Reactive Blending in a Twin Screw Extruder
- Die Extrusion
- Viscoelastic Simulations of Stratified Bicomponent Extrusion through Slit Dies
- Fibers
- Spinnability of Polymer Melts – a Complex Problem in Basic Research1)
- Molding
- Structure and Properties of Inflation Films of β-Phase Nucleating Agent-Added Polypropylene
- Inverse Modeling of Injection Molding Thermal Stresses to Optimize Temperature and Pressure History
- An Assessment of Thermal Stresses in Injection Moulded ABS Copolymer
- Rapid Communications
- Experimental Study on the Injection Compression Molding of Parts with Precision Contours
