OBRABOTKAMETALLOV Vol. 25 No. 3 2023 124 MATERIAL SCIENCE Analysis of mechanical behavior and free vibration characteristics of treated Saccharum munja fi ber 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. 117–125 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2023-25.3-117-125 ART I CLE I NFO Article history: Received: 24 May 2023 Revised: 06 June 2023 Accepted: 13 June 2023 Available online: 15 September 2023 Keywords: Saccharum munja Compression moulding machine Natural frequency Damping Tensile test ANOVA Acknowledgements Authors are very thankful to Rajkiya Engineering College, Azamgarh for providing laboratory for research work. ABSTRACT Introduction. With increasing environmental concern nowadays, researchers are studying new alternating materials that can meet the society needs and are extracted from renewable and biodegradable resources. The various natural fi bers have been investigated by researchers to replace synthetic ones. The purpose of the work. In present study, treated saccharum munja fi bers considered as reinforcement material in Particulate (PC), Short and Random (SRC) and in Unidirectional (UDC) form along with AW106 Resin and HV953. The paper assesses the mechanical properties of Munya fi bers (Saccharum munja). Initial six natural frequencies along with corresponding damping factors are measured to analyze the possibility of using a composite material. Research methods. A compression molding machine was used to form laminated composite materials. Surface treatment of fi bers removes the dust, lignin and hemicellulose, which improves mechanical and free vibration properties. Results and Discussion. Tensile and fl exural test shows the highest value of strength 170 MPa and 143 MPa in case of UDC composite, and the lowest in the case of PC. Addition of munja fi ber to epoxy matrix enhances the fi ber matrix adhesion bonding. The PC composite shows better value of damping than SRC and UDC composite. The highest natural frequency 43, 233, 298, 849, 918 and 1,440 Hz obtained in case of UDC irrespective of all modes. The results of the free vibration analysis show that Saccharum Munja fi ber composite may be used as structural material. Analysis of variance (ANOVA) shows that the experimental results output in case of tensile and fl exural teste are signifi cant. For citation: Singh S.P., Hirwani C.K. Analysis of mechanical behavior and free vibration characteristics of treated Saccharum munja fi ber polymer composite. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2023, vol. 25, no. 3, pp. 117–125. DOI: 10.17212/1994-6309-2023-25.3-117-125. (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. Idicula M., Boudenne A., Umadevi L., Ibos L., Candau Y., Thomas S. Thermophysical properties of natural fi bre reinforced polyester composites. Composites Science and Technology, 2006, vol. 66 (15), pp. 2719–2725. DOI: 10.1016/j.compscitech.2006.03.007. 3. Wu S., Guo M., Zhao J., Wu Q., Zhuang J., Jiang X. Characterization of the mechanical and morphological properties of cow dung fi ber-reinforced polymer composites: a comparative study with corn stalk fi ber composites and sisal fi ber composites. Polymers (Basel), 2022, vol. 14 (22), p. 5041. DOI: 10.3390/polym14225041.
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