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Krenchel, Mikkel; Madsbjerg, Christian

doi:10.4324/9781003052456-9

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“…It is assumed that all the fibers are arranged in the parallel form, and therefore, a constant K value is taken as 0.785 which is similar to that of other studies found in the literature. , The length efficiency factor calculated in this study was 0.997. Considering the high aspect ratio of the fiber length efficiency factor found in this study also agreed the previous study based on natural fibers. , The fiber orientation factor (η 0 ) recommended by the study of Krenchel was considered in this study in order to justify the fiber placement technique effect on composite properties. This value was 0.385 for 2D random fiber orientation reported in the literature by a similar study …”

Section: Results and Discussionmentioning

confidence: 99%

“…Considering the high aspect ratio of the fiber length efficiency factor found in this study also agreed the previous study based on natural fibers. 4 , 18 The fiber orientation factor (η 0 ) recommended by the study of Krenchel 25 was considered in this study in order to justify the fiber placement technique effect on composite properties. This value was 0.385 for 2D random fiber orientation reported in the literature by a similar study.…”

Section: Results and Discussionmentioning

confidence: 99%

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Short Jute Fiber Preform Reinforced Polypropylene Thermoplastic Composite: Experimental Investigation and Its Theoretical Stiffness Prediction

et al. 2023

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Natural-based lignocellulose fibrous materials can be used as a sustainable alternative to conventional fossil-based fibers such as glass fibers, in lightweight fiber-reinforced thermoplastic composites for marine, automotive, aerospace, or other advanced applications. However, one of the main challenges in using natural fiber-based thermoplastic composites is the low mechanical performance of composite structures. This can be improved significantly through the development of an optimized novel fiber architecture with enhanced fiber packing properties, following a low-cost production process. In this context, this study demonstrates a less energy-consuming and cheaper manufacturing process, for developing highly individualized short jute fiber-based dry fiber preform architecture, with an improved fiber packing property. Short jute fibers were chemically treated with alkali and PVA sizing treatments in the processing of new fiber preform architectures, and they were used in manufacturing of ultimate short jute fiber/polypropylene (PP) thermoplastic composites. The newly developed short fiber thermoplastic composites showed a significant improvement in mechanical properties (tensile, flexural, and impact) compared to any other natural fiber architecture-based (woven, knitted, nonwoven, unidirectional, etc.) composites found in the literature. Due to the use of new fiber architecture, the developed composites' fiber content was observed to increase. In addition, the compatibility of jute fibers with the polypropylene matrix was strengthened with the application of chemical treatments on highly individualized jute fibers. These reasons were responsible for the enhancement of mechanical properties of developed composites. Micromechanics of the fibers in composites were evaluated using the modified rule of the mixture and Halpin−Tsai equations for stiffness prediction of the composites in order to develop a theoretical understanding of newly developed composites' mechanics. It is thought that the improved mechanical performance of short jute fiber/PP thermoplastic composites can extend the use of these composites in many load-demanding applications, wherein normally synthetic fiber composites are used.

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