An Experimental Study of Static and Dynamic Behavior of the Hybrid Composite

ABSTRACT

Hybrid composites containing natural fibers are widely used for various applications due to their superior mechanical properties over synthetic fibers. The mechanical behavior of such hybrid composites under dynamic loading is a key concern. In the present study, a six-layered hybrid composite fabricated with four different layers of natural (sisal, flax, jute, and hemp) fibers, with top and bottom layers of synthetic glass fiber, is investigated for the impact strength and strain rate effects. The fractography at different strain rates has been analyzed using scanning electron microscopy. From the investigation, it is found that the strength bearing capacity of the hybrid composite increases as the strain rate is increased from 0.00022 s⁻¹ to 0.0888 s⁻¹. It is observed that there is an enhancement of 8.21% in the tensile strength, with average hardness and impact energy, which are 48.5 HV and 8 J, respectively. It is concluded that the developed composite is suitable for high strain rate applications.

摘要

含有天然纤维的混杂复合材料因其优于合成纤维的机械性能而广泛应用于各种应用. 这种混杂复合材料在动态载荷下的力学性能是一个关键问题. 在本研究中,研究了由四层不同的天然(剑麻、亚麻、黄麻和大麻)纤维制成的六层混杂复合材料,以及顶部和底部的合成玻璃纤维,以了解冲击强度和应变率效应. 用扫描电子显微镜分析了不同应变率下的断口形貌. 研究发现,随着应变率从0.00022 s-1增加到0.0888 s-1,混杂复合材料的强度承载力增加. 观察到拉伸强度提高了8.21%,平均硬度和冲击能分别为48.5 HV和8 J. 结论是,所开发的复合材料适合于高应变率应用.

KEYWORDS:

• Strain rate effects
• dynamic response
• natural fiber
• hardness
• impact energy
• mechanical properties

关键词:

• 应变率效应
• 动态响应
• 天然纤维
• 硬度
• 冲击能量
• 机械性能

Highlights

• At a higher strain rate, the fibers absorb more energy before breaking.

• Mechanical properties are improved due to increased interfacial adhesion properties.

• There is an increase in tensile strength as strain rate is enhanced.

• The energy absorption capacity of the fabricated hybrid composite is also increased due to the enhancement of interfacial bonding properties.

• An interesting fact was noticed about the fabricated hybrid composite that at lower strain rates, fibers were stretched out, while at high strain rates, fiber breakage was more.

Acknowledgments

The authors would like to express their gratitude to the Dr BR Ambedkar National Institute of Technology, Jalandhar, India, for providing the research facility.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Ethical approval

The authors confirm that all the research meets ethical guidelines and adheres to the legal requirements of the study country. The research does not involve any human or animal welfare-related issues.

Additional information

Funding

This work is not supported by any external agency in commercial, non-profit, or public.