Research Article Mechanical Behaviour of Alkali-Treated Fabric-Reinforced Polymer Matrix Composites M. D. Mohan Gift , 1 Shivkumar Mantri, 2 Surakasi Raviteja, 3 M. L. Rinawa, 4 Dhiren Ramanbhai Patel , 5 V. Nagaraju, 6 A. H. Seikh, 7 Sohail M. A. Khan, 8 and David Christopher 9 1 Department of Mechanical Engineering, Panimalar Engineering College, Nazarethpettai, Poonamallee, Chennai, Tamil Nadu 600123, India 2 Department of Conservative Dentistry, Hitkarini Dental College, Jabalpur, Madhya Pradesh, India 3 Department of Mechanical Engineering, Lendi Institute of Engineering and Technology, Denkada, Jonnada, Andhra Pradesh 535005, India 4 Department of Mechanical Engineering, Government Engineering College Jhalawar, Tehsil-Jhalrapatan, Rajasthan-326023, India 5 Department of Mechanical Engineering, Indus University, 382115, Ahmedabad, Gujarat, India 6 Department of Computer Science Engineering, Saveetha School of Engineering (SIMATS), Chennai 602105, Tamil Nadu, India 7 Mechanical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia 8 Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, Canada 9 Department of Mechanical Engineering, College of Engineering, Wolaita Sodo University, Ethiopia Correspondence should be addressed to David Christopher; david.santosh@wsu.edu.et Received 12 January 2022; Revised 14 March 2022; Accepted 19 March 2022; Published 28 April 2022 Academic Editor: M. Ravichandran Copyright © 2022 M. D. Mohan Gift et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Polyethylene (PE) was used as a composite material to create a fabric containing 40% pineapple, 30% jute, and 30% cotton fibres by weight. The physical characterisation is carried out, like deterioration and water absorption tests. PE-based composites were shown to have a lower water absorption rate when dipped in deionized water to perform an absorption test. Fabric/PE composites decomposed slowly in the soil during the degradation test. Alkali solution of 5 percent, 7 percent, and 9 percent sodium hydroxide by weight for 60 minutes was studied as alkali impact mechanical characteristics: mechanical testing’s like tensile strength and modulus, elongation at break, bending strength, and modulus. Data investigation exposed that the tensile strength and modulus, elongation at break, bending strength, and composite modulus values were 64 MPa and 871 MPa, 23.14 percent, 45 MPa, and 512 MPa. There were tensile strength and modulus, elongation at break, bending strength, and modulus of the neat polyethylene sheet that were 32Mpa and 342 MPa, 79 percent, 22 MPa, and 234 MPa, respectively. Compared to a polyethylene sheet, composite values for tensile strength and modulus, bending strength, and modulus raised by 107%, 156%, 110%, and 115% as a result of fabric reinforcing. 1. Introduction Because natural fibre is biodegradable and environmentally beneficial, composites made with natural fibres have been of tremendous interest. Composites are both cheap and environmentally friendly [1]. Fibre-reinforced materials (FRM) have long been known for their advantages over unreinforced materials, and their usefulness in a variety of industries has led to their widespread use. There are numer- ous applications for FRM, including aerospace and construc- tion [2, 3]. Additionally, net or extended continuous fibre- strengthened materials are utilized in the medicinal field. Hindawi Advances in Polymer Technology Volume 2022, Article ID 1833955, 8 pages https://doi.org/10.1155/2022/1833955