http://13.232.72.61:8080/jspui/handle/123456789/379 Fri, 03 Apr 2026 21:31:47 GMT 2026-04-03T21:31:47Z http://13.232.72.61:8080/jspui/handle/123456789/3373 Title: Influence of textile properties on dynamic mechanical behavior of epoxy composite reinforced with woven sisal fabrics Authors: Nagamadhu, M., Jeyaraj, P.; Mohan Kumar, GC. Abstract: Due to low cost and environmentally friendly characteristics, natural fibers gain much attention over synthetic fiber. The aim of the present work is to characterize the textile properties of three different types of sisal fabric and study dynamic mechanical properties and water absorption behavior of the sisal fabric reinforced epoxy composite. Influence of grams per square meter of fabric, weaving pattern of the fabric on textile properties of the fabric is studied first. Further, the effect of the same on the dynamic mechanical properties of the sisal composites is studied. Effect of fiber weight percentage and dynamic frequency on dynamic mechanical properties also studied. Results reveal that the storage modulus (G') decreases with increasing temperature in all the woven types of composites under consideration. However, Plain 2 (P2) and Weft Rib (WR) composites have shown better values of G' even after the glass transition temperature (Tg). From the results, it is also evident that storage and loss modulus (G'') increases when the yarn diameter decreases which is observed at a higher temperature also. It is also observed that fabric density also plays a significant role in the enhancement of G' and G' values. The water absorption of Plain 1 (P1) based composites are found to be less compared to the other types of composites analyzed. Wed, 01 Jan 2020 00:00:00 GMT http://13.232.72.61:8080/jspui/handle/123456789/3373 2020-01-01T00:00:00Z http://13.232.72.61:8080/jspui/handle/123456789/3370 Title: Simulation of Symmetric and Asymmetric Shape Rolling Processes Authors: Vishwanath, Srinivasan., Prakash, Satyam.; Praveen, M.P. Abstract: Steel is still a dominant structural material in use today and will be in the foreseeable future. It is estimated that the rolling process is used in 80-90% of the steel production worldwide. However, there are currently no off-line tools commercially available to predict a priori the microstructure and hence, the mechanical and geometric properties, of a rolled product after the steel has been subjected to the series of operations necessary for obtaining the desired shape. Consequently, attempts to correlate the rolling characteristics with mechanical properties and microstructure in the finished product have been predominantly empirical in nature. These empirical models may at best be valid under conditions that were used to generate the data, i.e. specific mill conditions and/or type of steel, but do not provide a detailed description of parameters throughout the product. Rod and bar customers today are demanding tighter specifications for tolerances on geometric, mechanical and microstructure properties to satisfy the requirements of the products they manufacture. This presents a problem for many rolling mill operators, who are accustomed to meeting stringent requirements on geometric and mechanical properties but not microstructural parameters. In order to determine precise mechanical equipment and processing necessary for optimizing the microstructure, more sophisticated computer models of deformation and microstructure evolution are needed. The coupling of the rolling process simulation with both deformation and microstructure evolution is a capability that is missing in the steel industry - as cited by a Steel Roundtable held in 1998 by the American Iron and Steel Institute (AISI). The goal of this project is to develop an off-line finite element model of hot rolling process to simulate mechanical deformation of rod and bar rolling that can be used by mill engineers in the steel industry and compare the results with experimental data and various empirical models. Thu, 01 Jan 2015 00:00:00 GMT http://13.232.72.61:8080/jspui/handle/123456789/3370 2015-01-01T00:00:00Z http://13.232.72.61:8080/jspui/handle/123456789/3359 Title: Wear Behavior of Al6061- Tungsten Carbide-Graphite Hybrid Composites Using Powder Metallurgy Technique. Authors: Muthu Gowda, T., Swamy, A.R.K.; Bhaskar Raju, SA., Shadakshari, R. Abstract: Abstract Hybrid composite materials are also called as advance composite material, combination of two or more second phase materials either in the form of particulate or fibres is reinforced in base matrix. In this present aimed study deals with the preparation of Al6061 based hybrid composite by Powder metallurgy technique. With the extent incorporation of graphite and tungsten carbide which is limited to 10% by weight, in which graphite is kept constant i.e., 4wt%, whereas Tungsten carbide 0-10% of particulate were dispersed in base matrix in step of 2% by weight. The increased percentage of reinforcement contributes in increase wear resistance of the hybrid composites. Wear features of the reinforced material is noticed and specimen of each composition examined under optical microscope. The experiment runs to analyze the wear performance are executed in accordance with L9 taguchi technique, design of experiment approach to obtain the wear data in a controlled manner. Effect of three control variables, via, Load (N), Speed (rpm) and Sliding distance (m) on the Specific wear rate and frictional force of the composites in unlubricated dry slippery conditions is examined by using pin-on-disc wear and friction monitor apparatus. Preliminary wear test were carried out to determine the maximum wear resistance by varying composition from 0%-10%WC and 4%Gr in which considering variables, via, Load (N), Speed (rpm) and sliding distance (m), as materials of higher abrasion resistance will have a lower volume loss. Thus as a result lower Weight loss of the specimen composition of material to be carried out. ANOVA is also carried out to inspect the effect of three control factors on the dry slippery wear performance of the composites. Taguchi analysis revealed that Load (N), Speed (rpm) and Sliding distance (m) remarkably influenced the dry sliding wear performance of the composites. The optimal level of three control variables for minimum wear rate are also obtained on the basis of ‘smaller the better’. Mon, 01 Jul 2019 00:00:00 GMT http://13.232.72.61:8080/jspui/handle/123456789/3359 2019-07-01T00:00:00Z http://13.232.72.61:8080/jspui/handle/123456789/3358 Title: The Role of Stacking order on Interlaminar Shear Strength of Woven Glass/Carbon Fiber Reinforced Epoxy Matrix Hybrid Composite developed by Resin Infusion Technique Authors: Nagaraja, KC., Rajanna, S.; Prakash, GS. Abstract: Fiber reinforced polymer hybrid composites have been widely used in aerospace, automobile, Marine and military applications due to their outstanding mechanical properties such as high specific strength and high stiffness. The study is made to investigate the effect of fiber stacking sequence on the mechanical properties of the hybrid laminates by reinforcing glass and carbon fibers into the epoxy matrix. The hybrid laminates were prepared by the resin infusion technique with a total of 8 plies, by varying the position of glass and carbon layers so as to obtain two different stacking sequences by keeping 00/900 orientation throughout the thickness of the laminate. In the present study bi-directional glass (631 GSM) and carbon (200 GSM) fibers were used to fabricate the laminates. The prepared laminates were cut as per ASTM D2344 to characterize the Interlaminar shear strength (ILSS) at the loading rate of 1 mm/min. The test results compared and found the stacking sequence where the carbon fibers at the extreme end show slightly superior to the laminate with glass fiber at the ends. Tue, 01 Jan 2019 00:00:00 GMT http://13.232.72.61:8080/jspui/handle/123456789/3358 2019-01-01T00:00:00Z