D. Mohana Krishnudu

Bio: D. Mohana Krishnudu is an academic researcher from Jawaharlal Nehru Technological University, Hyderabad. The author has contributed to research in topics: Fiber & Epoxy. The author has an hindex of 8, co-authored 21 publications receiving 170 citations. Previous affiliations of D. Mohana Krishnudu include Jawaharlal Nehru Technological University, Kakinada.

Mechanical and Wear Performances of Aluminium-Based Metal Matrix Composites: A Review

Abstract: For the comfortable and luxurious living of human beings, lakhs of products are beings produced daily and are increasing in number rapidly, using innovative technologies. So is the increasing demand for different materials to possess required properties, many a time contradicting ones like light weight and high strength. This necessity for new material with unconventional properties has paved the way to the emergence and development of materials—Metal Matrix Composites (MMC). Materials that possess required properties like high wear and corrosion resistance, good toughness, strength etc., in their fibrous form are conveniently reinforced with base metal matrix to produce MMC. Many such composites are developed for various applications, like in aerospace, automobile, and electronic systems. Development of such new composites posed different challenges in the form of their machinability, formability etc. Various research works attempted to optimize process parameters and develop mathematical models for predicting the machinability. MMCs can be prepared using different processes like Powder Metallurgy, Spray Deposition Method, stir casting, squeeze casting, and electroplating. Different works on MMCs used different production methods. Joining of MMCs is another area where some research is carried out. Some other works used different base materials and reinforcements to obtain needed properties for specific applications. Hence in this context, it is thought apt to consolidate work that is carried out during the last two decades. In this review work, the turn of events, use, and future capability of Al-MMCs in different mechanical and business applications are examined, together with the current difficulties frustrating their full market entrance.

Alkali Treatment Effect: Mechanical, Thermal, Morphological, and Spectroscopy Studies on Abutilon Indicum Fiber-Reinforced Composites

Abstract: Applicability of natural fiber-reinforced composites in automobile, aerospace like sectors has been increasing as more number of research works is concentrating on natural fibers owing to their eco...

An Investigation on Mechanical and Wear Characteristics of Al 6063/TiC Metal Matrix Composites Using RSM

Abstract: This paper focuses on the consequences of reinforcement content (TiC particles) on sliding wear behavior of aluminum alloy Al 6063 fabricated by stir casting process. Three different reinforcement percentages (5, 10 and 15) have been considered in the present study. Both hardness and tensile tests have been executed on the fabricated samples. The results of the conducted mechanical tests showed that the increase in reinforcement weight percent increased the tensile strength and hardness. Pin-on-disk tests have been performed on the fabricated composite samples to identify their tribological behavior. Reinforcement weight percent, load and sliding speed with three levels each were taken as the process variables, and specific wear rate is considered as response. Box–Behnken design have been utilized to carry out the experiments and to analyze the results. Moreover, ANOVA is carried out to know the influencing parameter on the response. From ANOVA, it was confirmed that reinforcement weight percent and sliding speed is considered as the influencing parameters on the response.

Impact of Alkali Treatment on Characterization of Tapsi (Sterculia Urens) Natural Bark Fiber Reinforced Polymer Composites

Abstract: Nowadays, research attention on composite materials accentuates where not only was their unique attributes agglomerated-alleviated weight and density, elevated impact and specific strengths, but al...

Plant-Based Natural Fibre Reinforced Composites: A Review on Fabrication, Properties and Applications

Abstract: The increasing global environmental concerns and awareness of renewable green resources is continuously expanding the demand for eco-friendly, sustainable and biodegradable natural fibre reinforced composites (NFRCs). Natural fibres already occupy an important place in the composite industry due to their excellent physicochemical and mechanical properties. Natural fibres are biodegradable, biocompatible, eco-friendly and created from renewable resources. Therefore, they are extensively used in place of expensive and non-renewable synthetic fibres, such as glass fibre, carbon fibre and aramid fibre, in many applications. Additionally, the NFRCs are used in automobile, aerospace, personal protective clothing, sports and medical industries as alternatives to the petroleum-based materials. To that end, in the last few decades numerous studies have been carried out on the natural fibre reinforced composites to address the problems associated with the reinforcement fibres, polymer matrix materials and composite fabrication techniques in particular. There are still some drawbacks to the natural fibre reinforced composites (NFRCs)—for example, poor interfacial adhesion between the fibre and the polymer matrix, and poor mechanical properties of the NFRCs due to the hydrophilic nature of the natural fibres. An up-to-date holistic review facilitates a clear understanding of the behaviour of the composites along with the constituent materials. This article intends to review the research carried out on the natural fibre reinforced composites over the last few decades. Furthermore, up-to-date encyclopaedic information about the properties of the NFRCs, major challenges and potential measures to overcome those challenges along with their prospective applications have been exclusively illustrated in this review work. Natural fibres are created from plant, animal and mineral-based sources. The plant-based cellulosic natural fibres are more economical than those of the animal-based fibres. Besides, these pose no health issues, unlike mineral-based fibres. Hence, in this review, the NFRCs fabricated with the plant-based cellulosic fibres are the main focus.

Recent Developments in Luffa Natural Fiber Composites: Review

Abstract: Natural fiber composites (NFCs) are an evolving area in polymer sciences. Fibers extracted from natural sources hold a wide set of advantages such as negligible cost, significant mechanical characteristics, low density, high strength-to-weight ratio, environmental friendliness, recyclability, etc. Luffa cylindrica, also termed luffa gourd or luffa sponge, is a natural fiber that has a solid potential to replace synthetic fibers in composite materials in diverse applications like vibration isolation, sound absorption, packaging, etc. Recently, many researches have involved luffa fibers as a reinforcement in the development of NFC, aiming to investigate their performance in selected matrices as well as the behavior of the end NFC. This paper presents a review on recent developments in luffa natural fiber composites. Physical, morphological, mechanical, thermal, electrical, and acoustic properties of luffa NFCs are investigated, categorized, and compared, taking into consideration selected matrices as well as the size, volume fraction, and treatments of fibers. Although luffa natural fiber composites have revealed promising properties, the addition of these natural fibers increases water absorption. Moreover, chemical treatments with different agents such as sodium hydroxide (NaOH) and benzoyl can remarkably enhance the surface area of luffa fibers, remove undesirable impurities, and reduce water uptake, thereby improving their overall characteristics. Hybridization of luffa NFC with other natural or synthetic fibers, e.g., glass, carbon, ceramic, flax, jute, etc., can enhance the properties of the end composite material. However, luffa fibers have exhibited a profuse compatibility with epoxy matrix.

Mechanical and Wear Performances of Aluminium-Based Metal Matrix Composites: A Review

Abstract: For the comfortable and luxurious living of human beings, lakhs of products are beings produced daily and are increasing in number rapidly, using innovative technologies. So is the increasing demand for different materials to possess required properties, many a time contradicting ones like light weight and high strength. This necessity for new material with unconventional properties has paved the way to the emergence and development of materials—Metal Matrix Composites (MMC). Materials that possess required properties like high wear and corrosion resistance, good toughness, strength etc., in their fibrous form are conveniently reinforced with base metal matrix to produce MMC. Many such composites are developed for various applications, like in aerospace, automobile, and electronic systems. Development of such new composites posed different challenges in the form of their machinability, formability etc. Various research works attempted to optimize process parameters and develop mathematical models for predicting the machinability. MMCs can be prepared using different processes like Powder Metallurgy, Spray Deposition Method, stir casting, squeeze casting, and electroplating. Different works on MMCs used different production methods. Joining of MMCs is another area where some research is carried out. Some other works used different base materials and reinforcements to obtain needed properties for specific applications. Hence in this context, it is thought apt to consolidate work that is carried out during the last two decades. In this review work, the turn of events, use, and future capability of Al-MMCs in different mechanical and business applications are examined, together with the current difficulties frustrating their full market entrance.