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 07694979520
Areas of Interest

PERSONAL HOMEPAGE:-https://sites.google.com/site/rks2010iitpacin/home

Smart materials

Mechanical Characterisation (Steel and Polymers)

Electro active Polymers

Application of smart materials in actuator design

Publications

Journals 

Raj Kumar Sahu, Abhishek Saini, Dilshad Ahmad, Karali Patra and Jerzy Szpunar, “Estimation and Validation of Maxwell Stress of Planar Dielectric Elastomer Actuators”,(Accepted) in Journal of Mechanical Science and Technology. 

Raj Kumar Sahu, K. Patra, S. Bhaumik, A. K. Pandey and D. K. Setua, “Stress-strain behaviour of dielectric elastomer for actuators” Applied Mechanics and Materials Vol. 789-790 pp 835-839, 2015.

Raj Kumar Sahu, Karali Patra and Jerzy A. Szpuner, "Experimental study and numerical modeling of creep and stress relaxation of dielectric elastomers"Strain, Vol 51, 43-54, 2015

Karali Patra, Raj Kumar Sahu, , A visco-hyperelastic approach to modelling rate-dependent large deformation of a dielectric acrylic elastomers, International Journal of Mechanics and Materials in Design, vol. 10, 2014.

Raj Kumar Sahu, Karali Patra, Characterization of tensile behavior of a dielectric elastomer at large deformations, Journal of The Institution of Engineers (India): Series C, vol. 95, 1-6, 2014.

Raj Kumar Sahu, B. Pramanik, K. Patra, S. Bhaumik, A. K. Pandey and D. K. Setua, Dissipation Factor of Acrylic Dielectric Elastomer-An Experimental Study, Journal of nanoscience and nanotechnology, vol. 14, 1-6, 2014.

Raj Kumar Sahu and Karali Patra, Rate dependent mechanical behavior of VHB4910 elastomer, Mechanics of Advanced Materials and Structure, 2013 (accepted) DOI: 10.1080/15376494.2014.949923

Raj Kumar Sahu, Karali Patra, Estimation of elastic modulus of dielectric elastomer materials using Mooney-Rivlin and Ogden Models, Advanced Materials Research, Vol. 685, pp. 331-335, 2013

Raj Kumar Sahu, Shrabani Majumdar and B.N Prasad, “Forming Limit Diagram of High Strength Steel Sheet (DP-590)”, MIT International Journal of Mechanical Engineering Vol. 1 No. 2 Aug 2011, PP114-118

 

International Conferences

Raj Kumar Sahu, Abhijeet Ranjan Keshari, Iqbal Hussain,  Pulkit Jain, “Non-linear relationship between tensile property and hole expansion ratio”,  17th ISME conference on Advances in Mechanical Engineering,IIT Delhi, Oct 03-04,2015

Raj Kumar Sahu, K. Sudharshan, K. Patra, S. Bhaumik, “Evaluation of Area Strain Response of Dielectric Elastomer Actuator Using Image Processing Technique”, Proc. of SPIE vol. 9056, 90562C-1.

Raj Kumar Sahu, B. Pramanik, K. Patra, S. Bhaumik, A. K. Pandey and D. K. Setua, Dissipation Factor of Acrylic Dielectric Elastomer-An Experimental Study, The 7th World Congress on Biomimetics, Artificial Muscle and Nano-bio, Jeju Island, South Korea, Aug 26-30,2013.

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.

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 Research, January 19-20, 2013, Dubai, U.A.E.

B. Pramanik, R.K. Sahu, S. Bhaumik, K Patra, A. K. Pandey, D.K. Setua, Experimental Study on Permittivity of Acrylic Dielectric Elastomer, IEEE Int. Conference on Properties and Applications of Dielectric Materials (ICPADM 2012), Bangalore, India, July 24-28, 2012

Raj Kumar Sahu, B. 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 29 – 30,2012, Berlin, Germany.

Vijay Narayan, Satish Solanki, Raj kumar 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.

National Conferences

Raj Kumar 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.

Raj Kumar 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,December 17-18, 2010, MNIT Jaipur ISBN: 978-81-908723-4-8.

Satish Solanki, Raj Kumar Sahu,  Karali Patra and Shovan Bhaumik, “A Theoretical Model for Viscoelastic Behavior of Dielectric Elastomer Materials”, 26th Indian Engineering congress, December 15-18,2011,Bangalore.

Vijay Narayan, Raj Kumar Sahu, Karali Patra and Shovan Bhaumik, “Specific energy density of dielectric elastomer actuator materials” 26th Indian Engineering congress, December 15-18, 2011, Bangalore.

Book Chapter

Vijay Narayan, Satish Solanki, Raj Kumar Sahu, Karali Patra and Shovan Bhaumik, Estimation of Specific Energy Density of dielectric elastomer materials:  using Mooney Rivlin Model & Ogden Model, Crystal Growth and Computational Material Science, MacMillan Advanced Research Series, Chapter 84, pp 297-301, 2012, ISBN: 978-935-059-048-5.

Patent

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 dated 26.08.2013

 

Other Info.

Membership

  • Science and Engineering Institute (SCIEI), Membership No.-20121214001
  • American Society for Testing Materials (ASTM)

 

Achievements and Responsibilities Handled:

  • Institute Post Graduate Representative for 2 years at IIT Patna
  • Stood Third position in National Level Volley ball Meet 2001.
  • Awarded Commonwealth Scholarship in 2013

 

Research Experience

2009-2010:  Researcher, Research and Development Division (Tata Steel Limited, Jamshedpur)

April  2013- Sept. 2013: Visiting Scholar, Dept. Of Mechanical Engineering, University of Saskatchewan, Canada