Die shape optimization for extrudate swell using feedback control

Description of Extrudate Swell for Polymer Nanocomposites

Extrudate swell is often observed to be weakened in nanocomposites compared to the pure polymer matrix. A theory quantifying this would be significant either for optimum processing or for understanding their viscoelasticity. A unified extrudate swell correlation with material properties and capillary parameters was suggested for polymer melt and their nanocomposites when considering the reservo...

Spectral/hp element methods for plane Newtonian extrudate swell

Article history: Received 14 August 2014 Received in revised form 22 March 2015 Accepted 2 April 2015 Available online 22 April 2015

Influence of Surface Cooling on Extrudate Swell - a Numerical Study

Influence of convective cooling at the extrudate’s free surfaces on its own swelling behaviour is examined numerically when viscous fluids of a Newtonian type are extruded. In circular die extrusion, increasing the surface heat transfer coefficient h increases extrudate’s thickness swell at low Nahme-Griffith number Na; at high Na, however, this trend tends to be reversed. With annular dies, a ...

Die Swell of Complex Polymeric Systems

Shape Control And Optimization Using Cantilever Beam

In this study, Analytical work is carried out for static shape control of cantilever beam structure with a use of laminated piezoelectric actuator (LPA). The mathematical modeling of beam element covered with LPA based on Timoshenko beam element theory and linear theory of piezoelectricity has been used. This work shows how number of actuators, actuator size, actuator location on beam and contr...