Finite element method for flow in compression molding of thin and thick parts

Erwin W. Liang, Charles L. Tucker

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Based on Barone and Caulk's model and a generalized variational functional, a finite element simulation was developed for the compression mold filling of thin and thick cavities. For solving the u-ν-p type equations, an element-based penalty method and a mixed formulation were implemented. Numerical results show that the new model gives better accuracy in velocity and velocity gradient than the Hele-Shaw formulation for cases where both models are appropriate. Predictions of velocity and its gradient by the model are compared with other FEM results and BEM solutions. Using a fixed mesh that covers the mold cavity, a new technique was developed for tracking the moving flow front. Temporary elements and nodes are generated for the filled part of elements intersected by the flow front. This method allows a smooth representation of the flow front and has exact boundary conditions on the flow front. The scheme is demonstrated for compression molding of elliptical and L-shaped charges.

Original languageEnglish (US)
Title of host publicationUse of Plastics and Plastic Composites
Subtitle of host publicationMaterials and Mechanics Issues
EditorsM. Ramulu, R. Komanduri
PublisherPubl by ASME
Pages569-585
Number of pages17
Volume46
ISBN (Print)0791812529
StatePublished - 1993
Externally publishedYes
EventProceedings of the 1993 ASME Winter Annual Meeting - New Orleans, LA, USA
Duration: Nov 28 1993Dec 3 1993

Other

OtherProceedings of the 1993 ASME Winter Annual Meeting
CityNew Orleans, LA, USA
Period11/28/9312/3/93

ASJC Scopus subject areas

  • Engineering(all)

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