OBRABOTKAMETALLOV Vol. 24 No. 3 2022 TECHNOLOGY Ta b l e 3 Validation experiments and modeling results Expt. no. FN (N) T ( oC) v (m/s) Specifi c wear rate (x 10-5) (Ws) (mm3/Nm) |% Error| Expt. value Statistical model ANN model Statistical model ANN model 1 130 1.72 1.72 1.72 1.72 1.72 5.06 1.72 2 90 4.97 4.97 4.97 4.97 4.97 19.16 4.97 3 40 5.04 5.04 5.04 5.04 5.04 15.33 5.04 4 140 1.29 1.29 1.29 1.29 1.29 7.72 1.29 5 170 3.24 3.24 3.24 3.24 3.24 7.61 3.24 6 70 5.13 5.13 5.13 5.13 5.13 6.10 5.13 Average error 10.16 3.57 model and ANN model were developed to predict specifi c wear rates to understand the parametric effect on specifi c wear rate. The followings conclusions could be drawn from the present study: It has been observed that the wear rate increased with the normal load, interface temperature, and sliding velocity. However, the increase was more prominent at higher process parameters. The normal load followed by sliding velocity and interface temperature were found as most signifi cant parameters affecting the wear rate. This was also confi rmed by the higher exponent value for the normal load followed by for sliding speed and then for interface temperature. The correlation coeffi cient of 0.97 observed for both the developed experimental-based mathematical and ANN models shows that the model could be reliably used to obtain wear rate of PTFE composite reinforced with carbon fi ber (35% by weight) against SS304 stainless steel. The results predicted by the developed models for specifi c wear rate were in good agreement with the experimental values with an average error close to 10%. However, the results predicted by the ANN model showed better agreement (avg. error of 3.57 %) with the experimental results than statistical-based models (avg. error of 10.16 %). References 1. Sonawane A., Deshpande A., Chinchanikar S., Munde Y. Dry sliding wear characteristics of carbon fi lled polytetrafl uoroethylene (PTFE) composite against Aluminium 6061 alloy. Materials Today: Proceedings, 2021, vol. 44, pp. 3888–3893. DOI: 10.1016/j.matpr.2020.12.929. 2. Chinchanikar S, Barade A, Deshpande A. Sliding wear characteristics of carbon fi lled polytetrafl uoroethylene (PTFE) composite against AISI 304 stainless steel counterface. Materials Science Forum, 2021, vol. 1034, 51–60. DOI: 10.4028/www.scientifi c.net/MSF.1034.51. 3. Unal H., Mimarolu A., Kadioglu U., Ekiz H. Sliding friction and wear behavior of PTFE and its composite under dry sliding conditions. Materials and Design, 2004, vol. 25, pp. 239–245. DOI: 10.1016/j.matdes.2003.10.009. 4. Sahin Y. Analysis of abrasive wear behavior of PTFE composite using Taughi’s technique. Cogent Engineering, 2015, vol. 2, no. 1, pp. 1–15. DOI: 10.1080/23311916.2014.1000510. 5. Venkateswarlu G., Sharada R., Rao M.B. Effect of fi llers on mechanical properties of PTFE based composites. Archives of Applied Science Research, 2015, vol. 7, no. 7, pp. 48–58. 6. Wang Q., Zhang X., Pei X. Study on the synergistic effect of carbon fi ber and graphite and nanoparticle on the friction and wear behavior of polyimide composites. Materials and Design, 2010, vol. 31, no. 8, pp. 3761–3768. DOI: 10.1016/j.matdes.2010.03.017. 7. Song F., Wang Q., Wang T. Effect of glass fi ber and MoS2 on tribological behaviour and PV limit of chopped carbon fi ber reinforced PTFE composite. Tribology International, 2016, vol. 104, pp. 392–401. DOI: 10.1016/j.triboint.2016.01.015.
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