Effect of clamshell powder on the mechanical and damping properties of epoxy-bamboo composites

IF 1.8 4区 工程技术 Q3 ENGINEERING, MECHANICAL
KJ Anand, Thippeswamy Ekbote, Saleemsab Doddamani, E Ashoka
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Abstract

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.
蛤壳粉对环氧树脂-竹复合材料机械性能和阻尼性能的影响
与单一天然纤维复合材料相比,天然纤维与填料颗粒的混合为增强复合材料的物理、机械和阻尼性能提供了一条前景广阔的途径。本研究深入探讨了将蛤壳粉(一种从蛤蜊坚硬的保护外壳中提取的填料)融入聚合物复合材料的问题。重点是研究蛤壳粉作为填充材料在增强环氧树脂-竹席复合材料的机械和阻尼特性方面的潜力。蛤壳填料的重量比从 0% 到 9% 不等,采用压缩成型法制造复合材料。根据 ASTM 标准,通过进行拉伸和弯曲测试来评估机械性能。采用冲击锤技术进行自由振动测试,以评估所开发复合材料的固有频率、阻尼比和模态振型,从而测量其阻尼特性。结果表明,添加蛤壳填料后,复合材料的拉伸强度、抗弯强度和阻尼特性都有明显改善。添加 6 wt% 填料的复合材料的抗拉强度提高了 18.5%,抗弯强度提高了 24.2%,这可归因于负载传递效率以及填料与环氧基体之间的界面粘合。扫描电镜分析证实了实验结果。9 wt% 填料的阻尼值最高,与不含蛤壳填料的复合材料相比,阻尼值提高了 30%。使用 ANSYS 软件进行的模态分析进一步验证了蛤壳填料的积极影响。这项研究强调了蛤壳填料在增强环氧竹复合材料的机械和阻尼特性方面的潜力,从而拓宽了其在各个领域的应用范围。
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来源期刊
CiteScore
3.80
自引率
10.00%
发文量
625
审稿时长
4.3 months
期刊介绍: The Journal of Mechanical Engineering Science advances the understanding of both the fundamentals of engineering science and its application to the solution of challenges and problems in engineering.
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