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Govind Ballabh Pant University of Agriculture and Technology, Pantnagar

After independence, development of the rural sector was considered the primary concern of the Government of India. In 1949, with the appointment of the Radhakrishnan University Education Commission, imparting of agricultural education through the setting up of rural universities became the focal point. Later, in 1954 an Indo-American team led by Dr. K.R. Damle, the Vice-President of ICAR, was constituted that arrived at the idea of establishing a Rural University on the land-grant pattern of USA. As a consequence a contract between the Government of India, the Technical Cooperation Mission and some land-grant universities of USA, was signed to promote agricultural education in the country. The US universities included the universities of Tennessee, the Ohio State University, the Kansas State University, The University of Illinois, the Pennsylvania State University and the University of Missouri. The task of assisting Uttar Pradesh in establishing an agricultural university was assigned to the University of Illinois which signed a contract in 1959 to establish an agricultural University in the State. Dean, H.W. Hannah, of the University of Illinois prepared a blueprint for a Rural University to be set up at the Tarai State Farm in the district Nainital, UP. In the initial stage the University of Illinois also offered the services of its scientists and teachers. Thus, in 1960, the first agricultural university of India, UP Agricultural University, came into being by an Act of legislation, UP Act XI-V of 1958. The Act was later amended under UP Universities Re-enactment and Amendment Act 1972 and the University was rechristened as Govind Ballabh Pant University of Agriculture and Technology keeping in view the contributions of Pt. Govind Ballabh Pant, the then Chief Minister of UP. The University was dedicated to the Nation by the first Prime Minister of India Pt Jawaharlal Nehru on 17 November 1960. The G.B. Pant University is a symbol of successful partnership between India and the United States. The establishment of this university brought about a revolution in agricultural education, research and extension. It paved the way for setting up of 31 other agricultural universities in the country.

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  • ThesisItemOpen Access
    Fabrication and characterization of novel liquid rubber modified epoxy
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-11) Gunwant, Dheeraj; Sah, P.L.
    A series of liquid rubber modified epoxies (LREs) were fabricated by dispersing pyrolysis derived liquid rubber (PLR) with concentrations ranging 0-25 wt. % into a commercially available epoxy resin (CY-230) followed by curing with triethylene tetramine (TETA, HY-951). The qualitative dispersion of PLR into cured epoxy was ascertained through atomic force microscopy (AFM) and DC conductivity. The nature of bonding of PLR with epoxy was studied using FTIR spectra. The LREs were cast into different dimensions according to ASTM D specifications. The effect of PLR on their mechanical and thermal properties has been evaluated. With PLR concentration, a regular decrease in hardness, tensile, flexural and compressive properties has been observed. This is attributed to the increase in size of phase separated rubber particles (RPs) as well as plasticization of epoxy matrix due to PLR addition. The impact strength and fracture toughness (KIC) of LREs improved gradually up to 15 wt. % of PLR concentration. This is attributed to the increase in size of plastic zone due to the presence of in the LREs. In order to correlate the improvement in impact strength and KIC values, specimens recovered from these tests were subjected to fractography using FESEM. Cavitation of RPs followed by shear yielding of epoxy matrix was observed to be the most prominent toughening mechanism in LREs. The effect of PLR on thermo-oxidative stability of cured epoxy as well as LREs was investigated through simultaneous thermogravimetric-differential thermal analysis-differential thermogravimetry (TG-DTA-DTG). Micromechanical modeling of LREs was conducted using a finite element (FE) model assuming bcc arrangement of RPs in epoxy matrix. The model was used to explain the lowering of stiffness using a novel scheme based on isotropic stiffness matrix and numerical homogenization technique (NHT). The model was employed to substantiate the experimental findings through stress analysis. Finally, the model was used to predict the effect of RP properties on the elastic properties and stress distributions in LREs.
  • ThesisItemOpen Access
    Thermo-hydraulic performance studies on solar air heater having rectangular sectioned tapered rib-roughness
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2017-08) Gupta, Akash Deep; Varshney, L.
  • ThesisItemOpen Access
    Studies on diesel alcohol emulsification and performance evaluation of C.I. engine on emulsified fuels
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2005) Gupta, Vijay Kumar; Agrawal, P.K.
  • ThesisItemOpen Access
    Investigation of stresses due to flow past a rotating circular cylinder
    (G.B. Pant University of Agriculture and Technology, Pantnagar (Uttarakhand), 2000) Misra, Anadi; Sadhu Singh
  • ThesisItemOpen Access
    Modifications in mechanical and thermal properties of epoxy polymethyl methacrylate composite through nanoclay reinforcement
    (Govind Ballabh Pant University of Agriculture and Technology;Pantnagar, 2006) Mannan, K. Tamil; Sah, P.L.
  • ThesisItemOpen Access
    Effect of butanol as an additive in ethanol Gasoline blended fuels on the performance & emission characteristics of an S.I. engine
    (G.B.Pant University of Agriculture and Technology, Pantnagar (Uttarakhand), 2016-07) Pandey, Vivek; Gupta, V.K.
    The power developed by an automobile is basically depends upon the fuel used for combustion. Gasoline and Diesel are basic fuels in liquid form which are extensively used in the world from last century. These fuels are derived from crude oil reserves, which is available in limited quantity in the world. This situation will create a problem for energy crises in the future. These fuels are also the big source of air pollution which is having a negative impact on environment as well as on human health. In the current scenario, ethanol is being used as an additive with gasoline in many of the countries in the world. Presently in India, 10 percent ethanol blending with gasoline is mandatory by the Government of India and from the year of 2017, it will be 20 percent. From the past researches it has been found that ethanol is a good replacement of gasoline but it has some disadvantages. Due to its hygroscopic nature, ethanol damages the internal part of the engines. It affects the metallic as well as non-metallic part of the engine. For overcoming this problem an effort has been made in this study by using butanol as an additive with ethanol-gasoline blends because butanol is not hygroscopic in nature and does not rust the internal parts of the engines. In this study, performance and emission characteristics of a multi-cylinder spark ignition engine has been evaluated on ethanol-gasoline blend with or without butanol addition. Ethanol was added with gasoline in three different volumetric ratios as 10, 20 and 30 percent. Butanol was added in the volumetric ratios of 2.5, 5, 7.5 and 10 percent with ethanol- gasoline and gasoline. Total sixteen blends have been prepared for the experiment. The property such as relative density, gross heat of combustion and flash and fire point of the tested fuel has been observed. Performance parameters of the engine such as bsfc, BTE, BSEC and EGT have been observed. Exhaust emission such as carbon monoxide, hydrocarbon and oxides of nitrogen has also been observed and all parameter has been compared with gasoline and ethanol-gasoline blends also. Experimental results showed that addition of butanol in ethanol-gasoline blends has positive effect on the engine performance. From the analysis of the experimental data, it is observed that bsfc, BTE and fuel energy in terms of BSEC improved. EGT also reduced. Emissions of CO and HC found to be lower compared to ethanol-gasoline blends and gasoline. While NOx emissions were on higher side. Overall, additive blends have been performed well and found suitable without any hardware modification of the engine.
  • ThesisItemOpen Access
    Thermo-mechanical characterization of rice husk and rice husk ash reinforced epoxy bio-composite
    (G.B. Pant University of Agriculture and Technology, Pantnagar - 263145 (Uttarakhand), 2015-06) Bisht, Neeraj; Gope, P.C.
    Use of natural fibre along with polymeric matrix has been vigorously pursued in the last decade because of their advantages of being environment friendly, biodegradable and economical. However the inherent hydrophilic nature of fibres and hydrophobic nature of polymers pose compounding difficulties leading to non-uniform dispersion of fibres in matrix consequently leading to decrease in efficiency of composites. However these compounding difficulties can be overcome by certain modifications which can make the fibre and the matrix more compatible. In the present work rice husk along with epoxy resin has been used to develop a composite material. To reduce the inherent conflicting nature of resin and rice husk, rice husk fibres are pre-treated with NaOH. Furthermore effect of addition of another reinforcement rice husk ash on the mechanical and physical characters of the composite has been studied. Addition of rice husk to the resin results in deterioration of various mechanical properties due to the natures of the two constituents discussed above. However the decrease in mechanical strength up to 20 wt% reinforcement is insignificant and statistical analysis shows that 10 wt% and 20 wt% reinforced composites have similar behaviour. Keeping in mind the economical and environmental advantages of replacing larger quantity of polymer RH reinforcement of 20% by weight has been taken as optimum filler loading. Further to make fibre and matrix compatible, rice husk particles are pre-treated with NaOH solution of different concentration. It is observed that NaOH treatment has profound impact on the mechanical properties. However excessive deterioration of fibres at higher levels of NaOH concentration (higher than 8%) results in decrease in mechanical strengths. Silica addition also improved the properties marginally when silica was added in smaller quantities of 0-1%. At higher filling levels there was reduction in mechanical strength. SEM tests were conducted to predict the mechanism behind the changes that occurred in properties at every stage of work. The present work can provide an insight into the application of rice husk and product of its thermal degradation for developing bio-composites which are more environment friendly and at the same time have superior properties than the polymeric materials which have unfortunately become an integral part of our day to day life.
  • ThesisItemOpen Access
    Mechanical behaviour and crack growth studies of gas tungsten arc butt welded joints of 31000-H2 (IS-737) aluminium alloy
    (G.B. Pant University of Agriculture and Technology, Pantnagar-263145 (Uttarakhand), 2015-06) Rajiv Suman; Gope, P.C.
    Welding, as one of the most effective joining methods for metals, has been extensively applied in engineering usage since a long time. The determination of microstructure and mechanical properties of welded structures is thus of paramount importance to implement a damage tolerant approach to structural life extension. In this study, structural and mechanical properties evaluation of 31000-H2 (IS-737) Aluminium Alloy after single pass Tungsten Inert Gas (TIG) welding were investigated to reveal the yield strength, ultimate strength, percentage elongation, impact strength and hardness of welded joints. The TIG Welding results of aluminium alloys 31000-H2 for 5 mm plate thickness using different filler materials during welding are presented. Effect of welding was studied on four different zones such as parent Metal (PM), weld metal (W), heat affected zone (HAZ) and combined zone of base Metal and heat affected zone (W+H). Welded specimens were investigated using scanning electron microscopy (SEM), UTM and Rockwell micro-hardness tester. Scanning electron microscopy was used to characterize transition sites of welded zone, HAZ, base metal and combined zone of base Metal and heat affected zone. Tensile test was conducted to characterize weld strength by determining ultimate tensile strength and micro-hardness test was conducted to characterize the homogeneity of welding in terms of mechanical properties. Study of the interaction between the cracks and inclusions in thin plates is important in providing a good understanding of mechanical behaviour of structures with defects, and is helpful to the material and structural designs, especially in the fields of modern micro-electronic mechanics and material science. It is well known that interaction of multiple cracks has major influence on the crack growth behaviour. The problem of crack growth analysis in a welded joint containing multiple cracks is one of the major problems, which is not focused in detail by the researchers. This problem in metal represents a complex phenomenon. Hence, the present aim is focused in the experimental investigation of crack trajectory and growth from the single cracks that present in a welded joint. The effect of weld morphology on mechanical response and failure load in commercially available 31000-H2 (IS-737) Aluminium alloy is focused. Crack acceleration, crack coalescence etc. are the part of the present investigation. The purpose of this work is to shed light on some of the experimental observations and computational concerns on crack growth due to presence of single crack in a welded component under tensile, shear, pull out modes.