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| Titel: |
OPTIMUM DESIGN OF PROCESS CONDITIONS TO MINIMIZE RESIDUAL STRESSES IN INJECTION-MOLDED PARTS |
| Auteur: |
Kang, Shinill Hieber, C. A. Wang, K. K. |
| Verschenen in: |
Journal of thermal stresses |
| Paginering: | Jaargang 21 (1998) nr. 2 pagina's 141-155 |
| Jaar: |
1998-03-01 |
| Inhoud: |
An inverse design method has been developed to obtain an optimum mold-wall-temperature history that produces an injection-molded part with minimum residual-stress distribution. Optimization has been formulated within the framework of nonlinear least squares and a modified Gauss-Newton method with a zeroth-order regularization technique. The transient temperature field has been generated based upon a purely viscous formulation of the filling and post-filling stages, and the cooling-induced residual stresses have been calculated employing a thermo-rheologically simple, linear viscoelastic model. The present study shows that, with an optimum cooling history, maximum residual-stress levels can be reduced significantly for both unconstrained and constrained vitrification with holding pressure. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
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