Abstract
Although good progress was made by two international benchmark exercises on in-plane permeability, existing methods have not yet been standardized. This paper presents the results of a third benchmark exercise using in-plane permeability measurement, based on systems applying the radial unsaturated injection method. 19 participants using 20 systems characterized a non-crimp and a woven fabric at three different fiber volume contents, using a commercially available silicone oil as impregnating fluid. They followed a detailed characterization procedure and also completed a questionnaire on their set-up and analysis methods. Excluding outliers (2 of 20), the average coefficient of variation (cv) between the participant’s results was 32% and 44% (non-crimp and woven fabric), while the average cv for individual participants was 8% and 12%, respectively. This indicates statistically significant variations between the measurement systems. Cavity deformation was identified as a major influence, besides fluid pressure/viscosity measurement, textile variations, and data analysis.
| Original language | English |
|---|---|
| Pages (from-to) | 100-114 |
| Number of pages | 15 |
| Journal | Composites Part A: Applied Science and Manufacturing |
| Volume | 121 |
| DOIs | |
| Publication status | Published - Jun 2019 |
Keywords
- A. Fabrics/textiles
- B. Permeability
- D. Process monitoring
- E. Liquid composite molding
- E. Resin flow
ASJC Scopus subject areas
- Ceramics and Composites
- Mechanics of Materials