Naslov
A methodology for simulation of the filling stage in injection molding and its application in the analysis of flow induced stresses in thin wall parts

Autori
Oliveira, João ; Fávero, Jovani ; Jasak, Hrvoje ; Secchi, Argimiro ; Cardozo, Nilo

Izvornik
Polymer engineering and science (0032-3888) 12 (2013); 1003, 27

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
injection molding ; simulations ; stress

Sažetak
An OpenFOAM based solver for simulation of the cavity filling stage in injection molding, named viscoelasticThermalFoam, is presented. It was developed from the solver viscoelasticInterFoam through the inclusion of the energy conservation equation and the equations which describe the dependence of the rheological parameters as a function of the temperature. The solver uses the finite volume method (FVM) for the discretization of mass, momentum and energy equations, and volume of fluid (VOF) method for capturing the flow front evolution during the cavity filling. The implemented solver was used to evaluate the influence of cavity thickness and injection velocity on the flow induced stresses during the filling stage of simple 2D geometries (planar parallel plates geometry) with a nonlinear viscoelastic fluid described by the incompressible Leonov model. It was found that the cavity thickness has higher effect than the injection velocity on these stresses and that neglecting flow induced stresses with relation to thermal induced stresses may be inappropriate for the analysis of residual stresses in thin wall injected parts.

Izvorni jezik
Engleski

Znanstvena područja
Strojarstvo

POVEZANOST RADA