Dr. RAJ KUMAR SAHU

Department Mechanical Engineering
Designation Assistant Professor
Educational Qualification B.Tech, M.Tech, (PhD)
E-Mail raj.mit.mech@gmail.com, rksahu.mech@nitrr.ac.in
Contact Number +917694979520/+917987188852
Areas of Interest
  • Composite Materials
  • Material Development
  • Functinally Graded Material
  • Electroactive Polymers
  • Dielectric Elastomers
  • Dielectric Elastomer Transducers (Actuators, Sensors and Generators)
Publications

Sponsored research projects: - 02 

1. Title of the project: - Development, characterization of functionally graded material with self-lubrication property for cutting tool applications

 Co- Supervisor: - Dr. G. Srinivasu

 Sponsored by: - Chhattisgarh Council of Science and Technology, Raipur

 Year: - 2015-2019

 Project Value: - 3.5Lakhs

Status: - Completed

 2. Title of Project: - Characterization of Strain Induced Behaviours of Electroactive Polymers for Sensor and Actuator Applications.

 Co- Supervisor: - N.A

 Sponsored by: - Science and Engineering Research Board, Department of Science and Technology, New Delhi

 Year: - 2016-2020

 Project Value: - 31,52,600/-

Status: - Completed

Patents 

  1. C. Mahender, D. Siddhartha, R. K. Sahu, K. Patra, S. Bhaumik, A. K. Pandey and D. K. Setua, ‘A biaxial stretching device for simultaneously stretching of an elastomer sample’, Patent application no. 985/KOL/2013 dt 26.08.2013

 

 

Book Chapters :- 05

Number of Chapters Published: 05

Title of the Chapter & Book

Name of Author(s)

Name of the Publisher

ISBN No.

Year of Publication

Reprint No./ Edition No.

Solid Lubricant Effect on the Microstructure and Hardness of the Functionally Graded Cemented Tungsten Carbide

R. S. Parihar, S. G. Setti, and Raj Kumar Sahu

Springer Nature Singapore Pte Ltd.

978-981-15-1200-1 978-981-15-1201-8 (eBook)

2020

Lecture Notes in Mechanical Engineering Page: 745-752

Modified Electromechanical Model for Dielectric Elastomer Cylindrical Actuators

O. P. Prabhakar, D. Sahu, and Raj Kumar Sahu

Springer Nature Singapore Pte Ltd.

978-981-15-1200-1 978-981-15-1201-8 (eBook)

2020

Lecture Notes in Mechanical EngineeringPage: 397-404

Pre-strain in Dielectric Elastomer Actuator; Challenges Towards Structure--Property Relationship

 D. Sahu, O. P. Prabhakar, Raj Kumar Sahu, and K. Patra

Springer Nature Singapore Pte Ltd.

978-981-15-1200-1

978-981-15-1201-8 (eBook)

2020

Lecture Notes in Mechanical Engineering Page: 389-396

Fabrication of Metal matrix composites by Stir casting process with stirring parameters optimization

Raj Kumar Sahu and Mohit Kumar Sahu

Intech Publishers,Croatia

978-1-78923-033-8

2018

Chapter 7

Book name : Advanced Casting Technologies

Estimation of Specific Energy Density of dielectric elastomer materials:  using Mooney Rivlin Model & Ogden Model

Vijay Narayan, Satish Solanki Raj Kumar Sahu, Karali Patra and Shovan Bhaumik

Macmillan Publishers India Ltd.

978-935-059-048-5

2012

Vol 43 Issue 41

 

Publications in International Journals (Published/Accepted: 16)

  1. R. S. Parihar, R. K. Sahu, and S. G. Setti, “Novel design and composition optimization of self-lubricating functionally graded cemented tungsten carbide cutting tool material for dry machining,” Adv. Manuf., pp. 1–13, 2020. (Impact Factor: 2.568)
  2. M. K. Sahu and R. K. Sahu, “Experimental Investigation, Modeling, and Optimization of Wear Parameters of B4C and Fly-Ash Reinforced Aluminum Hybrid Composite,” Front. Phys. 8 219, 2020. (Impact Factor: 2.638)
  3. D. Sahu, R. K. Sahu, K. Patra, and J. Szpunar, “Raman spectroscopy of pre-strained VHB 4910 elastomer towards actuator application,” Vib. Spectrosc., vol. 106, p. 102994, 2020. (Impact Factor: 1.917)
  4. D. Sahu, R. K. Sahu, and K. Patra, “Effects of crosslink density on the behavior of VHB 4910 dielectric elastomer,” J. Macromol. Sci. Part A, vol. 56, no. 9, pp. 821–829, 2019. (Impact Factor: 1.349)
  5. R. S. Parihar, S. G. Setti, and R. K. Sahu, “Effect of sintering parameters on microstructure and mechanical properties of self-lubricating functionally graded cemented tungsten carbide,” J. Manuf. Process., vol. 45, pp. 498–508, 2019. (Impact Factor: 4.086)
  6. R. S. Parihar, S. Gangi Setti, and R. K. Sahu, “Preliminary investigation on development of functionally graded cemented tungsten carbide with solid lubricant via ball milling and spark plasma sintering,” J. Compos. Mater., vol. 52, no. 10, pp. 1363–1377, 2018. (Impact Factor: 1.972)
  7. M. S. Bisht, S. Majumdar, and R. K. Sahu, “Microstructural Characterization of an 800 Mpa Single Phase Ferritic Advanced High Strength Steel (AHSS),” Int. J. Appl. Eng. Res., vol. 13, no. 6, pp. 230–237, 2018.
  8. M. K. Sahu and R. K. Sahu, “Optimization of stirring parameters using CFD simulations for HAMCs synthesis by stir casting process,” Trans. Indian Inst. Met., vol. 70, no. 10, pp. 2563–2570, 2017. (Impact Factor: 1.205)
  9. R. S. Parihar, S. G. Setti, and R. K. Sahu, “Recent advances in the manufacturing processes of functionally graded materials: a review,” Sci. Eng. Compos. Mater., vol. 25, no. 2, pp. 309–336, 2018. (Impact Factor: 0.7)
  10. R. K. Sahu and K. Patra, “Rate-dependent mechanical behavior of VHB 4910 elastomer,” Mech. Adv. Mater. Struct., vol. 23, no. 2, pp. 170–179, 2016. (Impact Factor: 3.517)
  11. R. K. Sahu, A. Saini, D. Ahmad, K. Patra, and J. Szpunar, “Estimation and validation of maxwell stress of planar dielectric elastomer actuators,” J. Mech. Sci. Technol., vol. 30, no. 1, pp. 429–436, 2016. (Impact Factor: 1.345)
  12. K. Patra and R. K. Sahu, “A visco-hyperelastic approach to modelling rate-dependent large deformation of a dielectric acrylic elastomer,” Int. J. Mech. Mater. Des., vol. 11, no. 1, pp. 79–90, 2015. (Impact Factor: 3.48)
  13. R. K. Sahu, K. Patra, and J. Szpunar, “Experimental study and numerical modelling of creep and stress relaxation of dielectric elastomers,” Strain, vol. 51, no. 1, pp. 43–54, 2015. (Impact Factor: 1.313)
  14. R. K. Sahu, B. Pramanik, K. Patra, S. Bhaumik, A. K. Pandey, and D. K. Setua, “Dissipation factor of acrylic dielectric elastomer—An experimental study,” J. Nanosci. Nanotechnol., vol. 14, no. 10, pp. 7439–7444, 2014. (Impact Factor: 1.354)
  15. R. K. Sahu and K. Patra, “Characterisation of tensile behaviour of a dielectric elastomer at large deformation,” J. Inst. Eng. Ser. C, vol. 95, no. 3, pp. 207–212, 2014.
  16. R. K. Sahu, S. Majumdar, and B. N. Prasad, “Forming limit diagram of high strength steel sheet (DP-590),” MIT Int J Mech Eng, vol. 1, pp. 114–118, 2011.

Publications in International Conferences (Published/accepted: 23)

  1. M. K. Sahu and R. K. Sahu, “Aluminum Based Hybrid Metal Matrix Composites: A Review of Selection Philosophy and Mechanical Properties for Advanced Applications,” in International Journal of Mechanical and Production Engineering Research and Development (IJMPERD), 2020, pp. 8–28.
  2. M. K. Sahu and R. K. Sahu, “Synthesis, microstructure and hardness of Al 7075/B4C/Fly-ash composite using stir casting method,” Mater. Today Proc., vol. 27, pp. 2401–2406, 2020.
  3. R. S. Parihar, S. G. Setti, and R. K. Sahu, “Solid Lubricant Effect on the Microstructure and Hardness of the Functionally Graded Cemented Tungsten Carbide,” in Advances in Applied Mechanical Engineering, Springer, 2020, pp. 745–751. International Conference on Applied Mechanical Engineering Research (ICAMER – 2019), NIT Warangal (India) on May 02nd-04th, 2019.
  4. O. P. Prabhakar, D. Sahu, and R. K. Sahu, “Modified Electromechanical Model for Dielectric Elastomer Cylindrical Actuators,” in Advances in Applied Mechanical Engineering, Springer, 2020, pp. 397–404. International Conference on Applied Mechanical Engineering Research (ICAMER – 2019), NIT Warangal (India) on May 02nd-04th, 2019.
  5. D. Sahu, O. P. Prabhakar, R. K. Sahu, and K. Patra, “Pre-strain in Dielectric Elastomer Actuator; Challenges Towards Structure--Property Relationship,” in Advances in Applied Mechanical Engineering, Springer, 2020, pp. 389–396. International Conference on Applied Mechanical Engineering Research (ICAMER – 2019), NIT Warangal (India) on May 02nd-04th, 2019.
  6. O. P. Prabhakar, D. Sahu, and R. K. Sahu, “Effect of Relative Permittivity with Strain in Dielectric Elastomer Peristaltic Actuator,” in IOP Conference Series: Materials Science and Engineering, 2019, vol. 691, no. 1, p. 12063. 2nd International Conference on Computational & Experimental Methods in Mechanical Engineering, Greater Noida, India May 3rd-5th, 2019.
  7. R. S. Parihar, S. G. Setti, and R. K. Sahu, “Prediction of thermal residual stresses in sigmoid functionally graded materials,” in AIP Conference Proceedings, 2019, vol. 2148, no. 1, p. 30018.
  8. D. Sahu, R. K. Sahu, and K. Patra, “Effects of uniaxial and biaxial strain on molecular structure of VHB 4910 dielectric elastomer,” in AIP Conference Proceedings, 2019, vol. 2057, no. 1, p. 20032.
  9. R. S. Parihar, R. K. Sahu, and G. Srinivasu, “Effect of Wire Electrical Discharge Machining on the Functionally Graded Cemented Tungsten Carbide surface integrity,” Mater. Today Proc., vol. 5, no. 14, pp. 28164–28169, 2018.
  10. R. K. Sahu, S. Yadu, V. Singh, S. Raja, and K. Patra, “The effect of micro molecular parameters on the actuation performance of electro active polymers,” in ASME International Mechanical Engineering Congress and Exposition, 2017, vol. 58417, p. V006T08A027. Tampa, Florida (USA), November 3rd-9th, 2017
  11. L. Kumar, S. Majumdar, and R. K. Sahu, “Measurement of the residual stress in hot rolled strip using strain gauge method,” in AIP Conference Proceedings, 2017, vol. 1859, no. 1, p. 20040. International Conference on Functional Materials, Characterization, Solid State Physics, Power, Thermal and Combustion Energy (FCSPTC) Eluru, Andhra Pradesh, 07th – 08th April 2017
  12. R. S. Parihar, R. K. Sahu, and S. G. Setti, “Finite Element Modelling of Functionally Graded Cemented Tungsten Carbide Compaction with Flow Stress Estimation,” Mater. Today Proc., vol. 5, no. 2, pp. 7009–7018, 2018. International Conference on Emerging Trends in Materials and Manufacturing Engineering (IMME 2017) at NIT Trichy, 10th-12th March 2017.
  13. Manoj Singh Bisht, S Majumdar and Raj Kumar Sahu, “Role of dislocation structure in LCF failure of 800 MPa ferritic steel strengthened with nano-precipitates”, Fatigue, Fracture and Integrity Assessment (FFIA)-2017, Jadavpur University 23rd-24th March 2017
  14. S. Yadu, S. Raja, V. K. Singh, R. K. Sahu, K. Patra, “The effect of Monomers on the Actuation Performance of Electro Active Polymers”, 8th International Conference on Advancements in Polymeric Materials (Marching towards smart products and multifunctional Materials), IISC Bangalore, 11th-13th February 2017
  15. R. S. Parihar, R. K. Sahu, and G. Srinivasu, “Finite element analysis of cutting forces generated in turning process using deform 3D software,” Mater. Today Proc., vol. 4, no. 8, pp. 8432–8438, 2017. International  Conference on Advancements in Aeromechanical Materials for Manufacturing (ICAAMM2016), 07th – 09th July 2016, MLR, Institute of Technology, Hyderabad, India.
  16. Raj Kumar Sahu, Abhijeet Ranjan Keshari, Iqbal Hussain, Pulkit Jain, “Non-linear relationship between tensile property and hole expansion ratio”, Proceedings of the 17th ISME conference on Advances in Mechanical Engineering, IIT Delhi, October 3rd-4th, 2015.
  17. Raj Kumar Sahu, K. Patra, S. Bhaumik, A. K. Pandey, D. K. Setua, “Stress-strain behaviour of dielectric elastomer for actuators”, International Conference on Mechanical Properties of Materials (ICMPM 2014) at Barcelona, Spain, December 18-20 2014.
  18. R. K. Sahu, K. Sudarshan, K. Patra, and S. Bhaumik, “Evaluation of area strain response of dielectric elastomer actuator using image processing technique,” in Electroactive Polymer Actuators and Devices (EAPAD) 2014, 2014, vol. 9056, p. 90562C. at California, USA, 09th-13th March 2014.
  19. Raj Kumar Sahu, K. Patra, S. Bhaumik, A. K. Pandey, D. K. Setua, Development of uniaxial tensile pre-straining device for the elastomeric materials, Proceedings of the 3rd International Conference on Production and Industrial Engineering (CPIE 2013), Jalandhar, India, 29-31 March, 2013.
  20. Raj Kumar Sahu, Karali Patra, “Estimation of Elastic modulus of dielectric elastomer materials using Mooney-Rivlin and Ogden models”, 3rd International Conference on Advanced Materials ResearchJanuary 19-20, 2013, Dubai, U.A.E.
  21. B. Pramanik, R. K. Sahu, S. Bhaumik, K. Patra, A. K. Pandey, and D. K. Setua, “Experimental study on permittivity of acrylic dielectric elastomer,” in 2012 IEEE 10th International Conference on the Properties and Applications of Dielectric Materials, 2012, pp. 1–4. Bangalore, India, July 24th-28th, 2012.
  22. R. K. SahuB. Pramanik, S. Bhaumik, K. Patra, A.K. Pandey, D.K. Setua, “Study on mechanical and dielectric behavior of VHB 4910 for sensor and actuator application,” Presented, EUROEAP Conference (Second international conference on Electromechanically Active Polymer (EAP) transducers & artificial muscles), May 29th – 30th 2012, Berlin, Germany.
  23. Vijay Narayan, Satish Solanki, R. K. Sahu, Karali Patra, Shovan Bhaumik “Estimation of specific energy density of dielectric elastomer materials using mooney-rivlin and ogden models” International Conference on Advanced Materials, December12-16,2011, Coimbatore,India.
  •  Publications in National Conferences (Published/accepted: 4)
  1. Satish Solanki, R. K. Sahu, Karali Patra and Shovan Bhaumik, A Theoretical Model for Viscoelastic Behavior of Dielectric Elastomer Materials, Proceedings of the 26th Indian Engineering congress 2011 (IEC2011), pp. 142, December 15-18, 2011, Bangalore, India.
  2. Vijay Narayan, R. K. Sahu, Karali Patra and Shovan Bhaumik, Specific Energy Density of Dielectric Elastomer Actuator Materials, Proceedings of the 26th Indian Engineering congress 2011 (IEC2011), pp 133, December 15-18, 2011, Bangalore, India.
  3. R. K. Sahu, Munshi Imran Hossain, Karali Patra and Shovan Bhaumik, Dielectric Elastomers: Materials for Future Actuators, 10th National Conference on Industrial Problems on Machines and Mechanisms (IPROMM–2010), December 17-18, 2010, MNIT, Jaipur (Rajsthan) ISBN: 978-81-908723-4-8.
  4. R. K. Sahu, Shrabani Majumdar and B.N Prasad, “Application of Metal Forming in Manufacturing Engineering”, National Conference on Recent trends and advances in the field of eco-friendly plant machineries, automobile and material handling system, January 29-30,2011, MIT West Bengal.

 

Other Info.

Awards: -

  1. Recipient of the Best Paper Award in International Conference on Applied Mechanical Engineering Research (ICAMER – 2019), on May 02-04, 2019 NIT Warangal (India) for “Pre-strain in Dielectric Elastomer Actuator; Challenges Towards Structure--Property Relationship”.
  2. International Travel Support (ITS) from SERB in 2014 and 2017
  3. Marquis Who’s Who 2017 Albert Nelson Marquis Lifetime Achievement Award
  4. Who’s Who in the World 2015 (32nd Edition)

 

Details of PhD Thesis Guided

S. No.

Name of Student

Title of Thesis

Year of Completion

1. Om Prakash Prabhakar Development of Soft filler-based Hybrid Dielectric Elastomer Composite for Improved performance of Electromechanical Transducers (Tentative) 2019-Ongoing
2.

Dhananjay Sahu

Structural-property Relationship in Dielectric Elastomers; toward Enhanced Electromechanical Actuation Performance (Tentative)

2018-Ongoing
3.

Amrit Mallick

Design and Development of Functionally graded material for automobile cylinder liner

2017-Ongoing

4.

Mohit Kumar Sahu

Development and Characterization of Hybrid Aluminum Matrix Composite for Advanced Applications

2014- Ongoing

5.

Rityuj Singh Parihar

Development Characterization and Modelling of Functionally Graded Cemented Tungsten Carbide for Industrial Applications

2019

 

Details of M.Tech. Thesis Guided

S. No.

Name of Student

Title of Thesis

Year

1.
Ankit Gupta Analytical Modelling of a VHB Polymer in Thermal Environment (Tentative)
Ongoing
2.

Om Prakash Prabhakar

Effect of Strain Induced Variation in Dielectric Constant on Performance of Dielectric Elastomer Based Cylindrical Actuator

2019

3.

Lokendra Kumar

Quantitative Determination of the Residual Stress in Hot Rolled Sheet

2017 

4.

Manoj Kumar Bisht

Mechanism of Low Cycle Fatigue (LCF) in HS 800 Steel

2017 

5.

Saswat Sharma

To Address the Problem of Post Manufacturing Reduction in Fatigue Life of High Strength Wheel

2016 

6.

Vinay Kumar Soni

Influence of Heating Rate on 3003 Aluminium Alloy and its Properties during Microwave Sintering 

2015 

 

Professional Body Memberships: -

  1. The American Society of Mechanical Engineers
  2. The Institutions of Engineers
  3. The Indian Society for technical education (ISTE)
  4. SAE India
  5. International Association of Computer Science and Information Technology
  6. Science and Engineering Institute (SCIEI)
  7. The Society for Polymer Sciences, India

Paper Reviewed for: -

  1. International Journal of Applied Ceramic Technology
  2. Defence Science Journal
  3. Europhysics Letters
  4. International Conference on Applied Mechanical Engineering Research (ICAMER-2019).
  5. Science China Technological Sciences
  6. Journal of Manufacturing Processes
  7. Emerging Materials Research

Professional Experience: -

  1. 2013- till date: Assistant Professor, NIT Raipur
  2. April 2013- Sept. 2013: Visiting Scholar, Dept. Of Mechanical Engineering, University of Saskatchewan, Canada
  3. 2009-2010:  Researcher, Research and Development Division (Tata Steel Limited, Jamshedpur)

Collaborators: -

 

Other Profiles (ID’s): -