P. Venkateshwar Reddy

Bio: P. Venkateshwar Reddy is an academic researcher from Vardhaman College of Engineering. The author has contributed to research in topics: Materials science & Fiber. The author has an hindex of 9, co-authored 42 publications receiving 260 citations. Previous affiliations of P. Venkateshwar Reddy include Jawaharlal Nehru Technological University, Hyderabad & Jawaharlal Nehru Technological University, Anantapur.

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.

American Society for Testing and Materials

Abstract: The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

A Systematic Review and Meta-Analysis of Swara and Waspas Methods: Theory and Applications with Recent Fuzzy Developments

Abstract: The Multiple Criteria Decision Making (MCDM) utility determining approaches and fuzzy sets are considered to be new development approaches, which have been recently presented, extended, and used by some scholars in area of decision making. There is a lack of research regarding to systematic literature review and classification of study about these approaches. Therefore; in the present study, the attempt is made to present a systematic review of methodologies and applications with recent fuzzy developments of two new MCDM utility determining approaches including Step-wise Weight Assessment Ratio Analysis (SWARA) and the Weighted Aggregated Sum Product Assessment (WASPAS) and fuzzy extensions which discussed in recent years. Regarding this, some major databases including Web of Science, Scopus and Google Scholar have been nominated and systematic and meta-analysis method which called “PRISMA” has been proposed. In addition, the selected articles were classified based on authors, the year of publication, journals and conferences names, the technique and method used, research objectives, research gap and problem, solution and modeling, and finally results and findings. The results of this study can assist decision-makers in handling information such as stakeholders’ preferences, interconnected or contradictory criteria and uncertain environments. In addition, findings of this study help to practitioners and academic for adopting the new MCDM utility techniques such as WASPAS and SWARA in different application areas and presenting insight into literature.

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.

Deep drawing simulations of tailored blanks and experimental verification

Abstract: Tailored Blanks are increasingly used in the automotive industry. A combination of different materials, thickness, and coatings can be welded together to form a blank for stamping car body panels. The main advantage of using Tailored Blanks is to have specific characteristics at particular parts of the blank in order to reduce the material weight and costs. To investigate the behaviour of Tailored Blanks during deep drawing, the ®nite element code DiekA is used. In this paper, simulations of the deep drawing of two products using Tailored Blanks are discussed. For verification, the two products are stamped to gain experimental information. The correlation between the experimental results and the simulation results appears to be satisfactory.