OBRABOTKAMETALLOV MATERIAL SCIENCE Vol. 25 No. 3 2023 Free vibration and mechanical behavior of treated woven jute polymer composite Savendra Singh a, *, Chetan Hirwani b Department of Mechanical Engineering, National Institute of Technology Patna, Patna, Bihar, 800005, India a https://orcid.org/0000-0002-5151-0284, savendrasingh123@gmail.com, b https://orcid.org/0000-0003-4291-4575, hirwani.ck22@gmail.com Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2023 vol. 25 no. 3 pp. 137–151 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2023-25.3-137-151 ART I CLE I NFO Article history: Received: 20 June 2023 Revised: 30 June 2023 Accepted: 10 July 2023 Available online: 15 September 2023 Keywords: Natural fiber FTIR Surface treatment Natural frequency Damping Free vibration SEM Acknowledgements Authors are very thankful to Rajkiya Engineering College, Azamgarh for providing laboratory for research work. ABSTRACT Introduction: Recently, the use of natural fibers have been increased to replace the use of synthetic fibers to save our environment from waste disposal problems, natural fibers have a lower level of mechanical properties. The purpose of work: This study examines the effect of treating the surface and deeper layers of jute fiber on the mechanical behavior and characteristics of free vibrations of a composite material based on it. The methods of investigation: due to the uniform distribution of stresses in the WARP and WEFT directions, four-layer basket weave jute fibers were used in this study. Result and discussion: the mechanical and free vibration properties of composite materials are significantly improved when NaOH is applied to jute fibers because it eliminates the weak matrix material lignin and makes the fibers stiffer and stronger. However, increasing the percentage of NaOH and soaking time for the fibers in NaOH solution have little effect on these properties. The highest value of tensile strength and tensile modulus are found 50 ± 1.17 MPa and 1.94 ± 0.23 GPa respectively seen in case of basket weave jute fiber composite with 1 hour treatment. Tensile strength and tensile modulus increase about 12 % and 40 % over the stokes value, respectively. Similarly the value of flexural strength and flexural modulus are found 95 ± 1.17 MPa and 3.99 ± 0.23 GPa respectively in case of basket weave jute fiber composite with 1 hour treatment. It also shows the highest value of fundamental frequency 77.837 Hz.The presence of an O-H bond in the composite, as revealed by FTIR study, gives it a hydrophilic character and limits its use in humid environments. The fiber to matrix ratio is shown in SEM images. For citation: Singh S.P., Hirwani C.K. Free vibration and mechanical behavior of treated woven jute polymer composite. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2023, vol. 25, no. 3, pp. 137–151. DOI: 10.17212/19946309-2023-25.3-137-151. (In Russian). ______ * Corresponding author Singh Savendra Pratap, Assistant professor Department of Mechanical Engineering National Institute of Technology Patna, 800005, Patna, Bihar, India Tel.: +91-9455446960, e-mail: savendrasingh123@gmail.com Introduction Natural fiber composites are good alternatives to synthetic ones for various low and medium load applications due to its low weight, low cost, high strength to weight ratio, biodegradability, high availability, and other characteristics. This is due to the growing demand for materials with special requirements for properties that do not pollute the environment. Natural fibers exhibit better mechanical and free vibration characteristics in a woven state. Properties improve as the number of layers increases [1, 2]. The dynamic mechanical characteristics of compositematerials increase as a result of reinforcing. The presence of cellulose and hemicellulose in fiber cells improves the woven natural fiber composite’s thermal characteristics [3]. The buckling characteristics of woven natural fiber composite are affected by the type of weave and deteriorate as the number of reinforcing layers increases. Fiberglass reinforcement improves the characteristics of composite materials [4]. The mechanical characteristics of woven natural fiber composites are also affected
RkJQdWJsaXNoZXIy MTk0ODM1