期刊
JOURNAL OF INDUSTRIAL TEXTILES
卷 51, 期 2_SUPPL, 页码 2372S-2390S出版社
SAGE PUBLICATIONS INC
DOI: 10.1177/1528083720961416
关键词
Sisal; hemp; hybrid composites; biocomposites; accelerated weathering; creep recovery; creep strain rate; Burger's model
资金
- King Mongkut's University of Technology North Bangkok (KMUTNB), Thailand [KMUTNB-64-KNOW-01]
In this study, the effect of weathering on the creep behavior of sisal, hemp, and their hybrid composites was investigated. The results showed that the creep strain decreased with the addition of fibers. Weathering and elevated temperature conditions had a significant impact on the creep resistance of the composites. The creep resistance of the hybrid composites was found to be dependent on the layering sequence.
In this work, the influence of weathering on the creep behavior of the sisal (SSSS), hemp (HHHH), and their hybrid composites (HSSH, and HSHS) was investigated. Composites were exposed to accelerated weathering for 2222 h, which replicates conditions equivalent to 1 year of outdoor exposure. Bio-epoxy based composites were fabricated by the hot press technique. Creep study was performed in a dynamic mechanical analyzer under the dual cantilever creep mode at 30 degrees C and 50 degrees C testing temperature under a load of 5 N. The creep-recovery behavior of the weathered composite specimens was evaluated and compared with the unweathered specimens. The investigation revealed that creep strain decreased with the incorporation of the sisal and hemp fibres into the bio-epoxy matrix. The experimental creep response of the composites was also in good agreement with the analytical results from Burger's model. Both the weathering and testing conditions at elevated temperature (50 degrees C) had a significant impact on the creep resistance of the composites. The creep resistance of the hybrid composites was found to be dependent on the layering sequence. HSHS configuration almost displayed similar creep properties before and after weathering. HSSH configuration was found to have lower creep resistance after weathering. Scanning electron microscopy was used out to examine the fibre-matrix interface of the composites.
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