Faculty Publications
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Item Effect of clamshell powder on the mechanical and damping properties of epoxy-bamboo composites(SAGE Publications Ltd, 2024) Anand, K.J.; Ekbote, T.; Doddamani, S.; Ashoka, E.Compared to single natural fibre composites, hybridising natural fibres with filler particles presents a promising avenue for enhancing composites physical, mechanical, and damping properties. This study delves into incorporating clamshell powder, a filler derived from clams’ hard protective outer shells, into polymer composites. The focus is on investigating the potential of clamshell powder as a filler material to augment the mechanical and damping properties of epoxy-bamboo mat composites. The weight ratio of clamshell fillers varied from 0% to 9%, and the compression moulding method was used to fabricate the composites. As per ASTM standards, mechanical properties were evaluated by conducting tensile and flexural tests. Free vibration tests by impact hammer technique were employed to evaluate the natural frequency, damping ratio, and mode shapes of developed composites to measure damping properties. Results revealed that adding clamshell filler significantly improved composites tensile strength, flexural strength, and damping properties. The addition of clamshell elevated the tensile strength by 18.5%, and flexural strength by 24.2% for composite with 6 wt% filler, which can be attributed to the efficiency of load transfer and the interfacial bonding between fillers and epoxy matrix. SEM analysis supported the experimental results obtained. The highest damping value is received for 9 wt% filler, showing 30% enhancement compared to composites without clamshell filler. Modal analyses using ANSYS software further validated the positive impact of clamshell filler. This study underscores the potential of clamshell filler in enhancing the mechanical and damping properties of epoxy-bamboo composites, broadening their applicability in various fields. © IMechE 2024.Item Seashell-based filler as sustainable reinforcement: a novel approach to enhance wear performance of bamboo-epoxy composites(Institute of Physics, 2025) Anand, K.J.; Murthy, A.G.S.; Ekbote, T.; Doddamani, S.; Madhusudhana, H.K.; Patil, A.S.Seashell wastes are discarded in landfills, causing environmental problem. This study presents a novel approach to valorize seashell waste by converting them into filler particulates and incorporate it into bamboo–epoxy composites. Composites of varying clamshell filler (0–9 wt%) loading were prepared using compression molding method. The wear behavior of composites was studied under dry sliding conditions on a pin-on-disc tribometer following ASTM G99 standard. Taguchi-ANOVA method was employed for statistical analysis of results and to identify the significant factors affecting wear rate. The results showed that adding seashell particles improved the hardness and wear resistance of the bamboo composites. ANOVA results indicated that load has the maximum effect of 47.4% and speed has the effect of 29.4%. Optimal performance was achieved for 6 wt% filler addition, exhibiting 17% improvement in hardness and wear rate was reduced by 60%. The enhancement in wear resistance of bamboo composite was correlated with an increase in hardness and a decrease in damage to the impact surface, as observed in SEM micrographs. These findings establish clamshell filler as an effective reinforcement for improving wear performance of bamboo composites. © 2025 IOP Publishing Ltd. All rights, including for text and data mining, AI training, and similar technologies, are reserved.