Advanced Materials and Processes Research Institute
Advanced Materials and Processes Research Institute, BhopalNot a member yet
809 research outputs found
Sort by
An Assessment of the Compressive Strength of Glass\ud Reinforced Plastic Waste Filled Concrete for Potential\ud Applications in Construction.
No full textEfforts were made to recycle Glass reinforced plastic (GRP) waste powder in concrete products and assess its compressive strength to comply with British Standards for use in\ud
construction applications. More than 90 GRP waste-filled concrete specimens were developed using the concentration of 5%, 15%, 30% and 50% (w/w). The findings revealed that the increase in concentration of GRP waste decreased the compressive strength. However, increase in curing duration resulted in improving the compressive strength of concrete. The findings of this work pave the way for further GRP waste recycling in precast construction products for use in various applications
Finite Element Analysis of sheet metal bending process to predict the springback.
No full textSpringback remains a major concern in sheet metal forming process. Springback, shape discrepancy between fully loaded and unloaded configuration due to elastic recovery of material, is mainly affected by geometrical parameters, material properties of sheet and lubrication condition between the blank and the tool. A total-elastic–incremental-plastic (TEIP) algorithm, for large deformation and large rotational problems, was incorporated in indigenous Finite Element software. This software was used to predict\ud
the springback in a typical sheet metal bending process and to investigate the influence of these parameters on springback. The results of simulation are validated with own experiments and published experimental results
Sliding wear resistance of Al-alloy particulate composites: An assessment on its efficacy
No full textOne of the advantages reported in Al-base alloy particulate composites is its improved sliding wear properties over its base alloy by several investigators. Much of the improvement depends on the experimental conditions, alloy composition as on the particulate size, shape and distribution in the\ud
matrix. The present paper will make an attempt to assess the improvement in sliding wear properties attained in a few Aluminium base alloys with different size, quantity and distribution of SiCparticulates and bring out the efficacy of making composites if any in the different alloy systems over other methods of property improvement like homogenisation, secondary processing, etc. In some cases\ud
remarkable improvements have been achieved, such as the composites have sustained much harsher conditions whereas the base alloy has seized at much milder conditions; whereas in other alloy systems the improvement is only comparable to that obtained by secondary processing. Properties attained on homogenisation, extrusion and making composites would be compared with the base alloys. In this paper an attempt will be made to draw a line as to the conditions under which composites can been used to make engineering products where improved sliding wear resistance is demanded and where\ud
more prevalent methods like ageing could serve the purpos
Solid particle erosion wear characteristics of fiber and particulate filled polymer composites.
No full textThe solid particle erosion behaviour of fiber and particulate filled polymer composites has been reviewed. An overview of the problem of solid particle erosion was given with respect to the processes and modes during erosion with focus on polymer matrix composites. The new aspects in the experimental studies of erosion of fiber and particulate filled polymer composites were emphasised in this paper. Various predictions and models proposed to describe the erosion rate were listed and their suitability was mentioned. Implementation of design of experiments and statistical techniques in analyzing the erosion behaviour of composites was discussed. Recent findings on erosion response of multi-component hybrid composites were also presented. Recommendations were given on how to solve some open questions related to the structure-erosion resistance relationships for polymers and polymer based hybrid composites
Development and electrical characterization of carbon soot filled polyester graded composites.
No full textIn this paper a novel method to develop carbon soot filled polyester graded composites has been reported. Dielectric measurements were conducted on these graded composites in the temperature range from 30 to 150 °C and in the frequency range 1–10 kHz to study and analyse the effect of temperature and frequency variation on dielectric constant (ε′) and dielectric dissipation factor (tan δ). It was observed that an increase of carbon soot content increased the dielectric constant gradually, which established the formation of a graded structure. Dielectric data were analysed using existing theoretical models. It was observed that Maxwell–Garnett model fits best for the dielectric data obtained experimentally for these graded composites. Compensation law confirmed the semi conducting behaviour of the composites. Cole–Cole plot for graded composites showed dielectric relaxation probably due to dipolar groups of polyester and interfacial polarization that occurred in the composites
Influence of Suspended Talc Particles in Oil and Nature of Material Microconstituents on Sliding Wear Characteristics of Cast Iron and Zinc-Based Alloy
No full textThis investigation pertains to some observations on the sliding wear behaviour of a zincbased alloy and grey cast iron as influenced by the content of talc particles suspend in SAE40 oil lubricant. Tribological parameters evaluated using a pin-on-disc machine were wear rate, frictional\ud
heating and friction coefficient. The study suggests that the presence of suspended talc particles in the oil lubricant brought about improved wear response of the samples. However, the degree of improvement was strongly dependent on the talc content and even adverse effect of talc addition beyond a limit was oted. The observed wear response of the samples has been explained in terms of characteristics like compatibility, lubricating and cracking tendency of various microconstituents of the specimen materials and formation and stability of lubricant film during sliding. Characteristic features of wear surfaces,\ud
subsurface regions and debris particles enabled to further substantiate the wear response of the sample
Process and die profile design for tube extrusion of γ iron
No full textThis study is related to material modeling and die and process design of tube extrusion of γ iron. Strain dependent rate power law is used for material modeling whose coefficients are arrived at through genetic algorithm (GA). Die profile of the tube extrusion process is optimized to produce microstructurally sound product at maximum production speed and minimum left out material in the die. The design problem is formulated as a nonlinear programming\ud
problem which is solved using GA. Selection of the\ud
processing parameters is carried out using dynamic\ud
material modeling (DMM). Using this approach tube\ud
extrusion process of γ iron is successfully designe
Removal of lead from aqueous solutions by hybrid precursor prepared by rice hulls.
No full textUse of low-cost hybrid precursor, prepared from rice hull has been studied as a sorbent for the removal of Pb(2+) from aqueous solutions. Effect of contact time, initial concentration, pH and temperature has been studied. The effect of temperature (30, 40, 50 and 60 degrees C) on adsorption phenomena has been studied and data have been analyzed using Langmuir isotherm. The change in enthalpy (Delta H) (-14.6179 kJ/mol), free energy (Delta G) and entropy (DeltaS) has also been evaluated. The negative values of Delta G and Delta H indicate the adsorption of lead ions on the surface of hybrid precursor to be spontaneous and exothermic under the experimental condition
Process and die design for square tube extrusion
No full textIn this study, die profile of the square tube extrusion process is optimized to produce microstructuarlly sound product at maximum production speed and minimum left out material in the die. The design problem is formulated as a nonlinear programming model, which is solved using genetic algorithms (GA). Selection of the processing parameters is carried out using dynamic material modeling (DMM). Using this approach a square tube extrusion process is successfully designed
Role of PVA Modification in Improving the Sliding Wear Behaviour of Bamboo
No full textThis experimental study was conducted to investigate the role of poly-vinyl-alcohol (PVA) treatment in improving the sliding wear behaviour of pure bamboo. The effects of dipping time in PVA solution and applied load on wear behaviour of bamboo samples were determined. The wear volume of bamboo was reduced when it was treated with PVA. The wear volume during sliding was increased with increasing of applied load, whereas the coefficient of friction was reduced on PVA treatment. Worn surfaces were observed by using SEM and discussed to explain the mechanism of wear.\u