Gurinder Singh Brar
@nituk.ac.in
Associate Professor, Department of Mechanical Engineering
National Institute of Technology Uttarakhand
RESEARCH INTERESTS
Advanced Machining and Joining Processes
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Prem Singh, Dharmpal Deepak, and Gurinder Singh Brar
Springer Science and Business Media LLC
Prasoon Choudhary and Gurinder Singh Brar
Springer Nature Singapore
Gulraj Singh, Gurinder Singh Brar, and Rupinder Singh
Springer Science and Business Media LLC
Shivendra Singh, Gurinder Singh Brar, and Ashu Kumar
IOS Press
Tube flaring process involves a conical tool of a certain length which is displaced to get an end flared tube, which is utilized to form a tight seal between pipes or tubes. Tube flaring refers to a kind of forging which is often a cold working operation. The tube forming process is widely used in several industries to form condenser pipes, car seat structures, exhaust piping, etc. Thin-walled tubes were used in automobiles to reduce the total weight for better performance. A conical tool is used for tube end forming in which the tool is moved into the tube known as conventional tube flaring. In this work, a numerical study was directed using FEA software ANSYS/Implicit which is used to analyze the stress conditions involved in tube flaring. Here, the tool is considered rigid and displaced by using displacement control by 25 mm, and other parameters were studied at this displacement. Effects of different semi-cone angles were also considered for the study.
Harnam Singh Farwaha, Dharmpal Deepak, and Gurinder Singh Brar
Springer Science and Business Media LLC
Gulraj Singh, Rupinder Singh, and Gurinder Singh Brar
Elsevier
Ashu Kumar and Gurinder Singh Brar
EDP Sciences
Aluminum alloys are the most attractive solutions for many industries including aerospace, marine, and other transportation sectors where lightweight construction is required. Friction Crush Welding (FCW) is a new material joining process that simultaneously creates a mechanical lock and a metallurgical seal at the interface between similar and dissimilar materials. In this research work presents the development of numerical modelling to predict the temperature distribution and mechanical performance of aluminum and copper similar joints in the FCW of sheet metal section. An explicit nonlinear transient finite element thermomechanical model is develop using ABAQUS based on the coupled Euler-Lagrange method to simulate FCW of AW5754 and Cu-DHP alloys. The Johnson-Cook materials law is adopted in the FEM. Numerical investigations of the FCW process was performed to reduce experimental testing times, which can be long and expensive. Temperature distribution and von misses stress flow patterns are observed at the top surface of the weld. Numerical simulation data correlate with experimental data in the literature.
Gulraj Singh, Gurinder Singh Brar, and Rupinder Singh
EDP Sciences
This study outline the procedure of filament fabrication for fused deposition modelling (FDM), based upon rheological, mechanical, thermal, wear and morphological characterization as a case study of acrylonitrile butadiene styrene (ABS) - melamine formaldehyde (MF) composite. It has been ascertained that with increase in proportion of MF in ABS, viscosity is improved and melt flow index (MFI) is reduced significantly. As regards to the wear behavior is concerned it has been observed that ABS-MF (12.5 wt.%) composite has shown minimum weight loss and porosity. For the mechanical properties of the composite, experimental results show increased brittleness of the samples with addition of MF reinforcement. The thermal stability analysis was performed using differential scanning calorimetry (DSC) for virgin ABS and samples having 12.5% MF in ABS and results show the increased heat capacity of the material with increase in MF percentage. Further for sustainability analysis (based upon thermal stability), matrix of ABS-MF12.5% was subjected to three repeated thermal (heating-cooling) cycles and it has been ascertained that no significant loss was noticed in heat capacity of recycled composite matrix. The results are also supported by Fourier transform infrared spectroscopy (FTIR) analysis. Overall the results of the rheological, mechanical, wear, morphological and thermal properties suggested that 12.5% proportion of MF can be reinforced into selected grade of ABS thermoplastic for 3D printing as a sustainable solution.
Rupinder Singh, Inderpreet Singh, Ranvijay Kumar, and GS Brar
SAGE Publications
This study reports the investigation of the waste thermosetting polymer, Bakelite (BAK), as a reinforcement along with ceramic particles (silicon carbide (SiC) and aluminium oxide (Al2O3)) in recycled thermoplastic acrylonitrile butadiene styrene (ABS) matrix for better sustainability. The ABS composite matrix has been prepared using a twin-screw extrusion (TSE) process. For mechanical testing and thermal stability analysis, conventional universal tensile testing and differential scanning calorimetry set-up has been used. The results of the study suggest that best mechanical properties were attained without the reinforcement of ceramic particles (90% ABS–10% BAK–0% SiC–0% Al2O3 by wt%), but ceramic reinforcements contributed to thermal stability of the matrix.
Gourav Mittal, Rupinder Singh, and Gurinder S. Brar
Elsevier
Prem Singh, Dharmpal Deepak, and Gurinder Singh Brar
Elsevier BV
Harnam Singh Farwaha, Dharmpal Deepak, and Gurinder Singh Brar
Springer Science and Business Media LLC
Hitesh Arora, Rupinder Singh, and Gurinder Singh Brar
SAGE Publications
The major concern in the high tech industries like oil and petroleum industries, automobiles, aeronautical, and nuclear power plants is the control of the defects like distortion in the welded joints and residual stresses occur due to arc welding on the circumferential joints of the thin pipes. Three-dimensional non-linear thermal and thermomechanical numerical simulations are conducted for the tungsten inert gas welding process of SS-304 stainless steel pipes. In this article, numerical analysis of the distribution of the temperature and the welding residual stress fields induced after the welding is done. Study on the effect of the welding heat input by varying the welding parameters (like welding current and welding speed) based on finite element simulations is conduit to examine the results on the residual stresses which is also called as the ‘locked-in’ stresses. The precision of the finite element model is validated for the welding residual stresses. The intention of this study is to provide the information to verify the validity of ongoing process circumferential manufacturing technology for thin-walled pipes, so to avoid the failure of these kinds of structures which are in service because of these intrinsic stresses.
Gurinder Singh Brar, Nimo Singh Khundrakpam, and Dharmpal Deepak
Springer Singapore
Harmeet Singh, Gurinder Singh Brar, Harish Kumar, and Vikrant Aggarwal
Elsevier BV
Prem Singh, Dharmpal Deepak, and Gurinder Singh Brar
American Society of Mechanical Engineers
Abstract In order to cater increasing need of lightweight and strong structures to be used in various industries like ship manufacturing, railways transportation, vehicle body cell etc., efforts have been made to develop and assess various welding or joining techniques. Dissimilar metal welding offers promising solution in this direction due to modification of properties by combining two dissimilar metals in terms of mechanical properties and better corrosion or electrical properties with lesser specific weight. Stainless steel of grade AISI 304 is widely used for manufacturing application in different industries and aluminum alloy 6061 T-6 has gaining importance in welding due to its high corrosive resistance and high weldability properties. In the present work, welding of dissimilar metals i.e. Aluminium 6061 T-6 and Stainless Steel – AISI 304 was carried out with new welding technique i.e. Friction Crush Welding (FCW). Dissimilar welds prepared at different levels of tool rotation and feed rate were characterized in terms of bond strength. Taguchi L9 Design of Experiments (DOE) was used to find optimal process parameters for dissimilar FCW. The theoretical optimum bond strength calculated using Taguchi L9 was 5134.53 N at tool rotation of 740 rpm and feed rate of 45 mm/mim. The theoretical optimum value was in line with the experimental results.
Hitesh Arora, Rupinder Singh, and Gurinder Singh Brar
SAGE Publications
Tungsten inert gas welding is one of the established joining processes for stainless steel. But hitherto very little has been reported on induced residual stresses in circular thin pipe joints during tungsten inert gas welding of SS 304. This paper reports the effect of welding parameters such as welding speed, welding current and shielding gas flow rate of tungsten inert gas welding on micro-hardness, width of the heat-affected zone, residual stresses and microstructural properties of SS 304 thin pipe joints. The results indicate that the welding current and the welding speed have a significant effect on micro-hardness of weld bead and width of the heat-affected zone. Further changes in the microstructure of the joints were studied in terms of dendrite formation. It has been observed that there is proportional increase in depth/width of the heat-affected zone with the heat input during the joining process, resulting in a decrease of micro-hardness. The results are also supported by radiographic analysis and X-ray diffraction data to understand the nature of residual stresses which was observed as compressive at the weld bead and tensile along the axis of thin welded pipe joints. Finally, the process capability analysis based on Cp and Cpk values of ≥1 suggests that the process can be gainfully used for mass production.
Hitesh Arora, Rupinder Singh, and Gurinder Singh Brar
SAGE Publications
This paper presents a state-of-the-art critical review of the thermal and structural modelling of the arc welding process. During the welding process, high temperature in the welding zone leads to generation of unwanted residual stresses and results in weld distortion. Measurement of the temperature distribution was a key issue and challenge in the past decade. Thermomechanical analysis is among the best-known techniques to simulate and investigate the temperature distribution, welding distortion and residual stresses in the weld zone. The main emphasis of this review is the thermal and structural modelling of welding processes and the measurement of welding residual stresses using different techniques. The study also provides information about the various types of heat sources and models used to predict the weld bead characteristics and thermomechanical analysis for different welding processes such as tungsten inert gas welding, metal inert gas welding and shielded metal arc welding.
Harnam Singh Farwaha, Dharmpal Deepak, and Gurinder Singh Brar
IOP Publishing
Abstract There is requirement of advancements in the machining processes able to achieve better surface finish in tight tolerances. It is not always easy to produce work piece characteristics in order to fulfill the listed requirements by only using the traditional finishing processes. Ultrasonic assisted electrochemical magnetic abrasive finishing (UEMAF) is a hybrid micro machining process and finish surfaces of hard and brittle materials up to nano meter scale. UEMAF integrates the use of electrochemical machining, ultrasonic vibrations and magnetic abrasive finishing. Taguchi technique is used to find optimal process parameters of Ultrasonic assisted electrochemical magnetic abrasive finishing (UEMAF). A L9 Orthogonal array, applied to analyze the effect of ultrasonic assisted electrochemical magnetic abrasive finishing process parameters (rpm of work piece, % wt. of abrasive and ultrasonic frequency time) on percentage improvement in surface finish (PISF).
Harnam Singh Farwaha, Dharmpal Deepak, and Gurinder Singh Brar
Elsevier BV
Prem Singh, Dharmpal Deepak, and Gurinder Singh Brar
Elsevier BV
Nimo Singh Khundrakpam, Gurinder Singh Brar, and Maibam Bindya Devi
Elsevier BV
Hitesh Arora, Rupinder Singh, and Gurinder Singh Brar
Elsevier BV
Nimo Singh Khundrakpam, Gurinder Singh Brar, and Dharmpal Deepak
IOP Publishing
In this paper, genetic algorithm (GA) approach is used in order to optimize the surface roughness (Ra) of near dry EDM (ND-EDM) surfaces. Taguchi orthogonal array of L27 is used as design of experiment for the five process parameters viz. pulse on time, duty factor, discharge current, gap voltage and tool rotating speed. ANOVA test was conducted and found that pulse on time was the most significant process parameters with 53.38% of contribution followed by duty factor and discharge current with 20.68% and 20.87% of contribution respectively. A regression mathematical model was developed and determined the relationship between the process parameters and surface roughness. GA approach was employed to optimize the process parameter. Then, a validation test was performed and confirmed the optimal process parameters values.