English  |  正體中文  |  简体中文  |  Items with full text/Total items : 63190/95884 (66%)
Visitors : 4595152      Online Users : 243
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library & TKU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version
    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/118013


    Title: Study on the Viscoelasticity Properties of the Glass Mat Thermoplastics (GMT) in Compression Molding System.
    Authors: Huang, Chao-Tsai (CT);Chen, Ling-Jue;Chien, Tse-Yu;Sun, Shih-Po;Wang, Chih-Wei;Hsu, Chih-Chung;Hsu, David;Chang, Rong-Yeu
    Keywords: Viscoelasticity;Glass Mat Thermoplastics (GMT);Compression Molding;fiber-resin matrix separation
    Date: 2019-03-18
    Issue Date: 2020-01-10 12:10:12 (UTC+8)
    Publisher: Society of Plastics Engineers
    Abstract: Compression molding is one of the lightweight technologies able to provide efficient way to retain fiber length for better mechanical property comparing to injection molding. In compression molding development, materials such as glass fiber mat thermoplastics (GMT) are often applied. However, due to the complicated micro-structure of the reinforced material, and the interaction of fiber-resin matrix, it is still challenge to have uniform compressed GMT product. In this study, we have developed a method to measure the rheological properties of GMT material through a compression system. Specifically, we have utilized compression molding system to estimate the rheological parameters of GMT. Those rheological parameters are then integrated into CAE (Moldex3D) to evaluate the flow behavior under the compression operation. Results showed that the trend of the loading force is increased exponentially against displacement at various compression speeds. However, some significant differences between simulation and experiment are observed. Specifically, at the early compression stage, the volume of long fiber-resin matrix is expanded by 50% in real experiment. This causes the loading force difference at the beginning between simulation and experiment. On the other hand, at the middle to the end stage, due to the fiber-resin matrix separation, the more the resin left the matrix, the higher the resistance generated. This results in the jump up of the loading force in the real experiments comparing to the simulation prediction. This deviation can be validated through the measurement of fiber content through TGA.
    Relation: SPE Technical Papers 35, p.1-5
    Appears in Collections:[Graduate Institute & Department of Chemical and Materials Engineering] Journal Article

    Files in This Item:

    There are no files associated with this item.

    All items in 機構典藏 are protected by copyright, with all rights reserved.


    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library & TKU Library IR teams. Copyright ©   - Feedback