Abstract/Details

Process simulation and quality prediction for manufacturing of optical media


2003 2003

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Abstract (summary)

A numerical simulation of the injection-compression molding process is developed with the capability of predicting product quality attributes including residual stress, birefringence, and warpage. A hybrid finite element/finite difference method is employed to calculate the temperature and pressure fields of the process with a non-isothermal compressible flow model. The process simulation is coupled with viscoelastic constitutive models to predict the flow and thermally induced residual stresses. A structural finite element analysis is formulated to predict the warpage of the disc due to asymmetric thermal stress and gravity after demolding. The flow and thermally induced birefringence of injection-compression molded optical media is predicted by applying a stress-optical rule to the flow and thermally induced stresses. The resulting model considers the contributions of flow and cooling induced molecular orientation, and the transient effect of thermal stress and pressure on the birefringence. The simulation is validated by compact-disc-recordable moldings with an optical grade polycarbonate under different processing conditions.

Indexing (details)


Subject
Mechanical engineering;
Industrial engineering
Classification
0548: Mechanical engineering
0546: Industrial engineering
Identifier / keyword
Applied sciences; Compact disc moulding; Manufacturing; Optical media; Quality prediction; Warpage
Title
Process simulation and quality prediction for manufacturing of optical media
Author
Fan, Bingfeng
Number of pages
150
Publication year
2003
Degree date
2003
School code
0118
Source
DAI-B 64/11, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
Advisor
Kazmer, David O.
University/institution
University of Massachusetts Amherst
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3110484
ProQuest document ID
305322648
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305322648
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