Creep of Discontinuous Long Fiber C/PEEK Above Tg
S. Stutz , N. Weibel
Greene, Tweed & Co., Yverdon, Switzerland
Discontinuous long fiber (DLF) materials are increasingly used by aircraft manufacturers to replace complex shaped metal parts. DLF is produced by cutting C/PEEK UD tape with 59 % fiber content into flakes that are then near net molded into parts. The use of this material has often been limited to temperatures below the glass transition temperature (Tg) as the polymer matrix is subject to increased creep above Tg. While it is known that the addition of carbon fibers reduces creep, there is no published data available that shows long term behavior at temperatures above Tg for DLF materials. In this presentation, we show the results of 1000 hours creep tests at temperatures up to 288 °C. The creep modulus of DLF is significantly higher than that of a 30 % short fiber filled injected C/PEEK and offers remarkably good long-term stability.
ITHEC 2018 Manuscript C2
Publication date: 05.04.2019
Manuscript C2 published in Conference proceedings ITHEC 2018
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