OBRABOTKAMETALLOV Vol. 25 No. 3 2023 149 MATERIAL SCIENCE 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 fi ber 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 fi bers have been increased to replace the use of synthetic fi bers to save our environment from waste disposal problems, natural fi bers have a lower level of mechanical properties. The purpose of work: This study examines the eff ect of treating the surface and deeper layers of jute fi ber 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 fi bers were used in this study. Result and discussion: the mechanical and free vibration properties of composite materials are signifi cantly improved when NaOH is applied to jute fi bers because it eliminates the weak matrix material lignin and makes the fi bers stiff er and stronger. However, increasing the percentage of NaOH and soaking time for the fi bers in NaOH solution have little eff ect 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 fi ber composite with 1 hour treatment. Tensile strength and tensile modulus increase about 12 % and 40 % over the stokes value, respectively. Similarly the value of fl exural strength and fl exural modulus are found 95 ± 1.17 MPa and 3.99 ± 0.23 GPa respectively in case of basket weave jute fi ber 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 fi ber 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 References 1. Rajesh M., Singh S.P., Pitchaimani J. Mechanical behavior of woven natural fi ber fabric composites: Eff ect of weaving architecture, intra-ply hybridization and stacking sequence of fabrics. Journal of Industrial Textiles, 2018, vol. 47 (5), pp. 938–959. DOI: 10.1177/1528083716679157. 2. Singh S.P. FTIR spectroscopy & mechanical behaviour study on jute fi ber polymer composite. Journal of Advanced Engineering Research, 2019, vol. 6 (1), pp. 34–38. 3. Rajesh M., Jayakrishna K., Sultan M.T.H., Manikandan M., Mugeshkannan V., Shah A.U.M., Safri S.N.A. The hydroscopic eff ect on dynamic and thermal properties of woven jute, banana, and intra-ply hybrid natural fi ber composites. Journal of Materials Research and Technology, 2020, vol. 9 (5), pp. 10305–10315. DOI: 10.1016/j. jmrt.2020.07.033.
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