The goal of this thesis is to model the plastic sheet reheat and forming process for thermoforming, and to measure the exact value of heat capacity for a set of plastic materials. / A series of experiments with heat flux and temperature sensors are performed on thermoforming machines at the Industrial Materials Institute, National Research Council, for the purpose of determining the heat capacity for several materials. The ambient air velocity, air temperature and the sheet internal temperatures at different depths inside a plastic sheet were measured. Based on these on-line measurements, a methodology for evaluating heat transfer coefficients and heat capacities was developed. Moreover, two different approaches were used to tune the experimental results through sensitivity analysis. Additionally, in order to improve simulation precision and better control the heating process, an approach for measuring internal sheet temperature is discussed. (Abstract shortened by UMI.)
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.82648 |
| Date | January 2004 |
| Creators | Zhang, Yan, 1972- |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Engineering (Department of Mechanical Engineering.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 002210041, proquestno: AAIMR12662, Theses scanned by UMI/ProQuest. |
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