Jawaharlal Nehru Technological University, Anantapur

About: Jawaharlal Nehru Technological University, Anantapur is a education organization based out in Anantapur, India. It is known for research contribution in the topics: Computer science & Cloud computing. The organization has 1388 authors who have published 1545 publications receiving 8286 citations. The organization is also known as: JNTU Anantapur & JNT University Anantapur.

Mechanical property evaluation of sisal–jute–glass fiber reinforced polyester composites

Abstract: The composite materials are replacing the traditional materials, because of its superior properties such as high tensile strength, low thermal expansion, high strength to weight ratio. The developments of new materials are on the anvil and are growing day by day. Natural fiber composites such as sisal and jute polymer composites became more attractive due to their high specific strength, lightweight and biodegradability. Mixing of natural fiber with Glass-Fiber Reinforced Polymers (GFRPs) are finding increased applications. In this study, sisal–jute–glass fiber reinforced polyester composites is developed and their mechanical properties such as tensile strength, flexural strength and impact strength are evaluated. The interfacial properties, internal cracks and internal structure of the fractured surfaces are evaluated by using Scanning Electron Microscope (SEM). The results indicated that the incorporation of sisal–jute fiber with GFRP can improve the properties and used as a alternate material for glass fiber reinforced polymer composites.

Chemical Composition of Natural Fibers and its Influence on their Mechanical Properties

Abstract: The conventional composites are replacing such well-established structural materials as steel, iron, and aluminum very fast. The conventional composites are not easily disposable. To overcome the problems of disposability and pollution, the focus is on the fabrication of natural composite materials. The natural composite materials are made from natural fibers and natural resins. Various natural fibers, such as jute, hemp, coir, cotton, and others are used in industry to fabricate natural composite materials. The fibers are load-carrying members in the composites. The main constituents of the fibers are cellulose, hemicelluloses, lignin, pectin, and wax. The composition of fibers depends on the geographic location where the plants are grown up. The peculiarity is the fact that all the fibers have the same constituents, but with different composition, which makes the fibers to behave differently. In this work, the Pearson rank correlation coefficients are found between the composition and properties of the fibers, and the corresponding equations of regression lines are obtained.

Mechanical and tribological properties of AA7075–TiC metal matrix composites under heat treated (T6) and cast conditions

Abstract: The sliding friction and wear behavior of aluminum matrix composites (AA7075–TiC) have been investigated under dry sliding wear conditions. The aluminum metal matrix composites (AMMCs) are produced as AA7075 matrix metal and TiC particulates of an average size of 2 μm as reinforced particles through stir casting. AMMCs studied are contained 2–10 wt.% of TiC particles in both as cast and heat treated (T6) conditions. All the composites exhibited better mechanical properties (hardness, tensile strength and percentage of elongation) than the matrix metal in both the conditions. The wear tests were carried out at a sliding velocity of 2 m/s, sliding distance 2 km and at normal load of 20 N. The wear resistance of the composites increased with increasing weight percentage of TiC particles, and also the wear rate was notably less for the composite material compared to the matrix material. A detailed analysis in as-cast condition and T6 condition of the AMMCs was carried out using SEM in order to find out the influence of TiC particles in the AMMCs formed. It has been observed that under T6 heat treatment condition, matrix as well as composite shown significant improvement in mechanical and tribological properties when compared in as cast condition.