The Practical Training Report at CoreTech System (Moldex3D) Co., Ltd. and the Investigation on the Viscoelastic Characterization of the Glass Mat Thermoplastics (GMT)
| Autor: | Tse-Yu Chien, 簡澤宇 |
|---|---|
| Rok vydání: | 2018 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 106 The main purposes of the practical training have two parts. Firstly, it allows me to get the chance to join the company to learn industrial technology in early age to understand the real company operation. Secondly, it helps me to join CoreTech System (Moldex3D) Co., Ltd. which is the software “Moldex3D” provider and allow me to study how the simulation model development. During the period, I was working at the technical support department of the material development center. The center mainly works on the material characterization and material data file setup for Moldex3D software. Moreover, the accuracy of the CAE simulation software depends on many foctors. One of the key factors is suitable governing equations for material during the polymer processing；Other key might be how accuracy of material properties characterized. In my practical training period, I was not only finished many material testing to fit some customers’ request regularly, but also have finished two research topics. One is “Experimental and viscoelastic investigations for the injection molded polycarbonate light guide plate”. Since viscoelastic performance is not the same for the all of polymer, this research discussed three viscoelastic models including Phan-Thien-Tanner, Giesekus, and Modify White-Metzner Model in the simulation software. The material used is PC122. The results showed that the Giesekus model can catch the best behavior of PC122. The second topic I have worked is “ Investigation on the Viscoelastic Characterization of the Glass Mat Thermoplastics (GMT)”. GMT is a composite for the continuous fiber that fiber concentration up to 60 wt%. In general, the capillary rheometer or cone and plant rheometer are limited to provide the accurate material data. In this study, GMT is wide used by the compression molding, so we test the GMT viscosity by the seft-developed compression system. The results showed that GMT viscosity properties are not constant during the heating and squeezing. Specifically, the power power lower index might be not a constant which might be due to the fiber-matrix separation pheonmena during the compression molding processing. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|