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Title: Uncertainty quantification of fiber orientation distribution measurements for long-fiber-reinforced thermoplastic composites

Journal Article · · Journal of Composite Materials
ORCiD logo [1];  [1];  [2]; ORCiD logo [3]; ORCiD logo [1]
  1. Purdue Univ., West Lafayette, IN (United States). Chemical Engineering. Shool of Aeronautics and Astronautics
  2. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  3. Univ. of Illinois, Urbana-Champaign, IL (United States). Dept. of Mechanical Science and Engineering

Here, we present a detailed methodology for experimental measurement of fiber orientation distribution in injection-molded discontinuous fiber composites using the method of ellipses on two-dimensional cross sections. Best practices to avoid biases occurring during surface preparation and optical imaging of carbon-fiber-reinforced thermoplastics are discussed. We developed a marker-based watershed transform routine for efficient image segmentation and the separation of touching fiber ellipses. The sensitivity of the averaged orientation tensor to the image sample size is studied for the case of long-fiber thermoplastics. A Mori–Tanaka implementation of the Eshelby model is then employed to quantify the sensitivity of elastic stiffness predictions to biases in the fiber orientation distribution measurements.

Research Organization:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1411878
Report Number(s):
PNNL-SA-122781
Journal Information:
Journal of Composite Materials, Vol. 52, Issue 13; ISSN 0021-9983
Publisher:
SAGECopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

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