Doctoral Dissertations
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Browsing Doctoral Dissertations by Subject "Bio-composites"
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Item Open Access Numerical and Experimental study of a bio composite material reinforced with lignocellulosic fibers(University of M'Sila, 2024-05-11) SAADA KhalissaAfter the signing of the Kyoto Protocol in 1997, attention gradually shifted towards sustainable development and carbon footprint reduction, particularly in research and innovation sectors. Plant fiber-reinforced composite materials emerged as a promising solution to address these environmental challenges while offering improved mechanical performance and increased durability. These materials are considered an eco-friendly alternative to traditional composites, often made from synthetic fibers derived from non-renewable resources. By utilizing fibers from plants such as flax, hemp, jute, and even kenaf, these materials offer significant environmental advantages. They help reduce dependence on other resources and can contribute to reducing greenhouse gas emissions throughout their lifecycle, from production to end-of-life use. This study focuses on the fabrication of silicone molds for creating traction and flexion samples, as well as the construction of honeycomb structures with various geometric patterns, using 3D printing and polylactic acid (PLA) material. The goal is to produce epoxy and polymer bio-composites reinforced with different natural fibers such as date palm, sisal, loofah, and jute. Epoxy samples were manufactured by inserting holes in the middle, and their mechanical behavior was evaluated through traction tests, with numerical verification using Abaqus software. The mechanical properties of natural fiber-reinforced bio-composites were enhanced using artificial neural networks (ANN) and response surface methodology (RSM), demonstrating a linear correlation with experimental results.