Prakash Kumar
Verified email at gmail.com
Assistant Professor, Department Production Engineering
BIT Mesra
RESEARCH INTERESTS
Vibration and control
Nonlinear dynamics
Structural dynamics
Modelling of human-induced force
Casting and Welding.
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Lecture Notes in Mechanical Engineering, ISSN: 21954356, eISSN: 21954364, Pages: 1-10, Published: 2022
C. Pandey, J.G. Thakare, P.K. Taraphdar, P. Kumar, A. Gupta, and S. Sirohi
Fusion Engineering and Design, ISSN: 09203796, Volume: 163, Published: February 2021
Elsevier BV
Abstract The dissimilar welds joint of 2.25Cr-1Mo steel and lean duplex LDX2101 steel was prepared using the Gas Tungsten Arc Welding (GTAW) process and employing the Inconel 617 filler. The microstructural stability of the dissimilar welds joint (DWJ) was studied using the optical microscope and field emission scanning electron microscope (FESEM) for as-welded (AW) and post-weld heat treatment (PWHT) condition. The PWHT was employed at 760 °C (PW 1) and 810 °C (PW 2) for 2 h of duration. The application of the heat-treatment resulted in the formation of the soft zone at the interface of weld metal and HAZ in 2.25 Cr-1Mo side, i.e., low Cr side. The mechanical behavior of the DWJs was also studied for AW and PWHT condition. A measurable change in the width and hardness of the soft and hard zones was measured with an increase in PWHT temperature. For weld metal, the minimum average hardness was measured 237 HV in AW and a maximum of 248 HV for PW 2. In the AW condition, the average CIT of the weld metal was measured 46.5 ± 3.5 J, which meets the minimum recommended value as per EN 1557:1999 standards. The PWHT showed a drastic reduction in CIT and a minimum of 34 ± 3 J was measured for PW 2. The CIT of the 2.25Cr-1Mo HAZ (notch adjacent to fusion boundary includes the soft ferrite region) was measured 45 ± 5 J in AW and get increased drastically after the PWHT and maximum was measured for PW 2 (86 ± 5 J).
Mantu Choudhary, Sumanta Mukherjee, and Prakash Kumar
Materials Today: Proceedings, eISSN: 22147853, Pages: 2482-2487, Published: 2021
Elsevier BV
Md Sajid Hussain, Sourav Goswami, Kunal Ghosh, Prakash Kumar, and Nilrudra Mandal
Materials Today: Proceedings, eISSN: 22147853, Pages: 2522-2527, Published: 2021
Elsevier BV
S. Sirohi, P. Kumar, A. Gupta, S. Kumar and C. Pandey
Materials Today: Proceedings, eISSN: 22147853, Pages: 1043-1049, Published: 2021
Nitish Kaushik, Prakash Kumar, Joyjeet Ghose, and Sanjay K Jha
Materials Today: Proceedings, eISSN: 22147853, Pages: 5573-5576, Published: 2020
Elsevier BV
Abstract Aluminium hybrid metal matrix nano composite (AHMNC) material has all the advantages of conventional metal matrix nano composite with multifunctional properties because of the hybrid reinforcement. As a result, these materials offer a unique combination of properties that are not possible to achieve in conventional materials. The present study deals with the fabrication of aluminium hybrid nano composites by reinforcing Al2014 with nano sized B4C and graphite, processed through stir casting route followed by ultrasonic and squeeze casting. The addition of B4C improves the hardness, whereas Gr particles improve wear resistance in the composite. These combinations of the reinforcements are chosen for application under high abrasive conditions. Ultrasonic agitation has been done to uniformly distribute the reinforcement, whereas squeeze casting is done to reduce the porosity of the cast. The cast composite has been cut to prepare specimens for hardness, tensile strength, and microstructure as per the ASTM standards. The mechanical properties of the composite were evaluated and compared to the conventional. The microstructure of the composites was studied using optical microscopy to investigate the proper distribution of reinforcement and microstructure in the AHMNCs. The result indicates a significant improvement in the hardness. Further, the microstructure studies reveal that the reinforcement was fairly uniformly distributed over the matrix material.
Prakash Kumar, Shailesh Dewangan, and Chandan Pandey
Materials Today: Proceedings, eISSN: 22147853, Pages: 5378-5383, Published: 2020
Elsevier BV
Prakash Kumar, Anil Kumar, Chandan Pandey, Shailesh Dewangan, and Sanjay K. Jha
Materials Today: Proceedings, eISSN: 22147853, Pages: 5632-5637, Published: 2020
Elsevier BV
Abstract A Nonlinear Energy Sink (NES) having essential nonlinear stiffness, it is nonlinearly attached to a primary system. In contrast to Tuned Mass Damper, the NES could be capable over a wider frequency range and only require a small additional mass. NES have good potential for vibration mitigation and energy harvesting. One of the most common energy sources in an environment is ambient vibration. Some micro electro-mechanical system with magnetostrictive or piezoelectric materials is used to convert ambient vibration into electrical energy. That can be stored and used to power other devices such as wireless sensors, health monitoring sensors or replacing small batteries that have a finite lifespan or would require difficult and expensive maintenance. This study focuses on materials for energy harvesting with NES. Piezoelectric materials have a good capability to convert the mechanical vibration energy into electrical energy and vice versa; therefore, they are more suitable for energy harvesting with NES. A state of the art review of the piezoelectric material frequently used in NES coupled energy harvester with their relative merit is presented.
Chandan Pandey, M.M. Mahapatra, Pradeep Kumar, Prakash Kumar, N. Saini, J.G. Thakare, and S. Kumar
Engineering Failure Analysis, ISSN: 13506307, Pages: 158-167, Published: February 2019
Elsevier BV
Prakash Kumar, Anoop Kumar Godara, and Anil Kumar
Lecture Notes in Mechanical Engineering, ISSN: 21954356, eISSN: 21954364, Pages: 405-413, Published: 2019
Springer Singapore
Shailesh Kumar Dewangan, Prakash Kumar, and Sanjay Kumar Jha
Lecture Notes in Mechanical Engineering, ISSN: 21954356, eISSN: 21954364, Pages: 93-100, Published: 2019
Springer Singapore
Chandan Pandey, M. M. Mahapatra, Pradeep Kumar, N. Saini, J. G. Thakre, and Prakash Kumar
Materials Performance and Characterization, eISSN: 21653992, Pages: 445-455, Published: 24 September 2018
ASTM International
Prakash Kumar, Anil Kumar, and Vitomir Racic
International Journal of Structural Stability and Dynamics, ISSN: 02194554, eISSN: 17936764, Published: 1 June 2018
World Scientific Pub Co Pte Lt
The paper proposes a self-sustained single-degree-of-freedom oscillator to accurately generate the longitudinal contact force between a pedestrian’s feet and the supporting flat rigid surface. The model is motivated from the self-sustained nature of pedestrian walking, i.e. a pedestrian produces the required internal energy to maintain a repetitive body motion. It is derived by adding two nonlinear terms to the conventional Rayleigh oscillator to yield odd as well as even harmonics, as observed in experimentally recorded longitudinal force data. For the dynamic analysis of the oscillator, two methods are adopted: the energy balance method and the Lindstedt–Poincare perturbation technique. Moreover, the least-squares identification procedure is used to identify values of the oscillator parameters from the force records of 12 different pedestrians walking on an instrumented treadmill at 10 walking speeds. The results generated by the proposed oscillator agree well with the experimental data.
Prakash Kumar, Anil Kumar, and Silvano Erlicher
International Journal of Structural Stability and Dynamics, ISSN: 02194554, eISSN: 17936764, Published: 1 February 2018
World Scientific Pub Co Pte Lt
This study proposes a single degree of freedom nonlinear oscillator to model the lateral movement of the body center of mass of a pedestrian walking on a flat rigid surface. Experimentally recorded ground reaction force of a dozen of pedestrians in the lateral direction is used to develop the model. In detail, the hardening and softening effects are observed in the stiffness curve as well as higher odd harmonics are present in the frequency spectrum of the lateral force signals. The proposed oscillator is a modification of the Rayleigh and the Van der Pol oscillators with additional nonlinear softening and hardening terms. To obtain an approximation of the limit cycle of the oscillator and its stability, two methods are studied: the energy balance method and the Lindstedt–Poincare perturbation technique. The experimental force signals of pedestrians at four different walking speeds are used for the identification of the values of the model parameters. The results obtained from the proposed model show a good agreement with the experimental ones.
Prakash Kumar, Anil Kumar, Vitomir Racic, and Silvano Erlicher
Mechanical Systems and Signal Processing, ISSN: 08883270, eISSN: 10961216, Pages: 345-363, Published: 15 January 2018
Elsevier BV
Archives of Metallurgy and Materials, ISSN: 17333490, Pages: 1755-1761, Published: 2018
Prakash Kumar, Anil Kumar, and Silvano Erlicher
Physica D: Nonlinear Phenomena, ISSN: 01672789, Volume: 358, Pages: 1-14, Published: 1 November 2017
Elsevier BV
Vikas Verma, Prakash Kumar, Kamal Kumar Mittal, Sandeep Chauhan, and P.C. Tewari
International Journal of Materials Engineering Innovation, ISSN: 17572754, eISSN: 17572762, Issue: 3-4, Pages: 219-235, Published: 2016
Inderscience Publishers
Prakash Kumar and Anil Kumar
Procedia Engineering, eISSN: 18777058, Volume: 144, Pages: 945-952, Published: 2016
Elsevier BV
Manoj Kumar Sethi, Prakash Kumar, and Anil Kumar
Procedia Engineering, eISSN: 18777058, Volume: 144, Pages: 689-696, Published: 2016
Elsevier BV