Dr. Dhiraj K. Mahajan

Assistant Professor,
Department of Mechanical Engineering
dhiraj.mahajan@iitrpr.ac.in

Room No. 322, Academic Block; Tel:+91-1881-242244 / +91-7814252244

Head, Training & Placement Cell, CDCRC (www.iitrpr.ac.in/cdcrc)

Coordinator, Manufacturing Research Group (https://tinyurl.com/y9rsdy76)

Biography

Dr. Dhiraj K. Mahajan joined IIT Ropar as Assistant Professor in December 2013. Prior to this, he was a post-doctoral researcher at ICAMS (Interdisciplinary Centre for Advanced Materials Simulations), Ruhr University Bochum (Germany), which he joined after his Ph.D. from IIT Kanpur in the field of Solid Mechanics. He has a Bachelor degree in Production Technology and a Masters degree in Advanced Manufacturing Processes. 

His group at IIT Ropar is motivated to correlate micro-structure, deformation/fracture mechanisms and manufacturing of materials ranging from reactor pressure vessel (RPV) steel to bioabsorbable polymers using ultramodern experimental and multiscale simulation techniques. Experimental techniques include fracture & fatigue studies using a servo-hydraulic fatigue machine, crack initiation & short fatigue crack studies using tensile/fatigue stage under SEM, material characterization using EDX/EBSD as well as electrochemical methods for corrosion and hydrogen permeation studies. Simulation techniques, on the other hand, include molecular dynamics, crystal plasticity finite element method (CPFEM) and density functional theory (DFT) calculations.

Recently, the group has made considerable progress in understanding short fatigue crack behavior in RPV steel (SA 508 Gr 3. Cl. 1 low alloy steel) and Hydrogen Embrittlement mechanisms in API steels. The group is also involved (though IMPRINT project) in developing indigenous high-pressure hydrogen storage technologies while putting continuous efforts in developing novel polymers for energy (PEM Fuel Cell Membranes) and biomedical (Stents) applications. The group is further interested in developing manufacturing processes protocol for hydrogen embrittlement resistant high-strength steels, Type-IV hydrogen storage cylinders, low-cost polyelectrolyte membranes for PEM Fuel Cells and bioabsorbable stents using micro-injection molding process to encourage mass production of these products within the country.

 

Our group, webpage can be browsed for more information (though little outdated) on this link: www.iitrpr.ac.in/rmml

 

Research Gate Profile: https://www.researchgate.net/lab/Ropar-Mechanics-of-Materials-Lab-RMML-Dr-Dhiraj-K-Mahajan-Lab-Dhiraj-K-Mahajan

 

Ongoing Sponsored Projects:

G) Title: Biodegradable Polymeric Stents: From Synthesis of Functionalized Raw Material to its Fabrication using Micro-Injection Moulding Process, Funding Agency: DST-Advanced Manufacturing Technology Program 2017, Role: PI, Status: Ongoing (September 2018-till date), Cost: 47.7 Lakhs. 

 

F)Title: Design, development, and demonstration of indigenous hydrogen storage and fuel cell system for mobile and stationary applications of 5 kW capacity, Funding Agency: IMPRINT (MHRD-MNRE), Role: Co-PI, Status: Ongoing (March 2017-till date), Cost: 400 Lakhs. IIT Ropar contribution (75 Lakhs) in this multi-IIT/industry project is to indigenously develop a Type IV Cylinder for high-pressure gaseous hydrogen storage for mobile applications.

 

E)Title: Development of an Effluent Treatment Plant for Handtool Industry, Funding Agency: Uchchatar Avishkar Yojana (MHRD-DST-MSME), Role: PI, Status: Ongoing (Oct. 2016-till date), Cost: 47 Lakhs. 

 

D)Title: Development of low cost, sustainable material systems for efficient generation, storage and transportation of hydrogen, Funding Agency: IIT Ropar, Role: Co-PI, Status: Ongoing (Jan 2016-till date), Cost: --. Through this institutional interdisciplinary project, I am responsible for establishing an explosion proof room and hydrogen permeation experimental facility for metals and polymers at IIT Ropar.  

 

C)Title: Study of the Effect of Microstructure on Fatigue Crack Initiation in Nickel under Hydrogen Environment using Coupled Framework of Crystal Plasticity & Hydrogen Transport Model, Funding Agency: DST (Young Scientist Award), Role: PI, Status: Ongoing (Aug. 2015-till date), Cost: 29 Lakhs.
 
B)Title: Grant under funds for improvement of S&T infrastructure (FIST), Funding Agency: DST-FIST, Role: Co-PI, Status: Ongoing (July 2015-till date), Cost: 225 Lakhs. As part of the project implementation group, I am responsible for establishing two facilities in the department: Tensile/Fatigue stage and EBSD stage for SEM.
 

A)Title: Investigation into the Role of Microstructure on Fatigue Behavior of Metals under Hydrogen Environment, Funding Agency: IIT Ropar, Role: PI, Status: Ongoing (Oct. 2014-till date), Cost: 42 Lakhs. 

 

 

Completed Projects:

 

A)Title: Design and development of a customized elastomeric balloon for a constant air pressure output bio-medical device, Funding Agency: COEO Labs Pvt. Ltd., Bangalore (Consultancy), Role: PI, Status: Completed (Mar 2016 to Oct-2016), Cost: 5.25 Lakhs.

 

 

Updates:

 

July 2018: 

In a conference organized by Indian Structural Integrity Society (InSIS) and DMRL naming Structural Integrity Conference and Exhibition 2018 (www.sice2018.in ) at Hyderabad from 25th-27th July 2018, Ph.D. students from our group won the third best presentation and best poster award.

> Mr. Rakesh Kumar won the third best presentation award for his presentation titled “Modelling of Fatigue Crack Initiation and Propagation in Hydrogen Charged Polycrystalline Nickel”. 

> Mr. Aman Arora won the third best poster award for his poster titled “In-situ Study of the Effect of Hydrogen on Fatigue Crack Initiation and Propagation in Polycrystalline Nickel”.

The award section on the conference website lists their achievements: https://www.sice2018.in/site/conference-awards

 

December 2017: IIT Ropar team received Veziroglu Award in the 2017 HY-contest organized by Hydrogen Association of India. The student team headed by Dr. Mahajan included two Ph.D. students: Tushita Rohilla (2016mez0002), Sunil Sharma(2016mez0016) and one dual degree student: Vishal Kumar (2015med1010).

 

December 2015: A one-week course titled "Applied Fatigue and Fracture Mechanics"  got approved under GIAN scheme (http://www.gian.iitkgp.ac.in/). The course will be taught by Dr. Richard Pettit, Founder of Fracture Labs, U.S.A with Dr. Mahajan as host faculty at IIT Ropar from 16th May 2016 to 21st May 2016. 

 

December 2015: Mr. Kishan Govind, a final year B.Tech student in Mechanical Engineering and RMML group member got nominated for 2016 Commonwealth Scholarship in the UK in Material Science branch.

 

December 2015: A team comprising Dr. Mahajan and three final year B.Tech students from Department of Mechanical Engineering has won the HY-2015 contest organized by Hydrogen Association of India (http://hai.org.in/contest.php). 

 

 

 

Areas of Research

Role of grain boundaries in fatigue failure of steels under hydrogen environment
Crystal plasticity based modeling of metal plasticity
Material behavior modeling based on Molecular Dynamics
Mechanics and physics of polymeric materials
Thermoplastic polymer-substrate adhesion improvement based on substrate surface modifications

Education

PhD, IIT Kanpur (Advisor: Prof. Sumit Basu)
M.Tech, NIT Warangal
B.Tech, S.B.S.C.E.T, Ferozepur, Punjab

Work Experience

May 2014-July 2014: Visiting Faculty, Interdisciplinary Centre for Advanced Materials Simulations (ICAMS), Ruhr University Bochum, Germany
January 2010 - December 2013: Post Doctoral Research Assistant at ICAMS (www.icams.de), Ruhr University Bochum, Germany. (Advisor: Prof. Alexander Hartmaier)
May 2007 - August 2007: Visiting Research Scientist at INSA Lyon, France (Advisor: Prof. Rafael Estevez)

Other Information

Teaching Interest: Crystal Plasticity, Mechanics of Materials, Atomistic Modeling of Materials, Continuum Mechanics, Elasticity and Plasticity of Large Deformations, Fracture and Fatigue, Advanced Manufacturing Techniques.

 

 

 

Selected Publications/Patents

(1) S. Basu, D. K. Mahajan, and E. Van Der Giessen. Micromechanics of the growth of a craze fibril in glassy polymers. Polymer, 46(18): 7504{7518, August 2005. doi:10.1016/j.polymer.2005.05.148
(2) M. K. Majumder, S. Ramkumar, D. K. Mahajan, and S. Basu. Coarse-graining scheme for simulating uniaxial stress-strain response of glassy polymers through molecular dynamics. Physical Review E, 81(1): 011803, January 2010. doi:10.1103/PhysRevE.81.011803
(3) D. K. Mahajan, and S. Basu. Investigations into the applicability of rubber elastic analogy to hardening in glassy polymers. Modelling and Simu- lation in Materials Science and Engineering, 18(2): 025001, March 2010. doi:10.1088/0965-0393/18/2/025001
(4) D. K. Mahajan, B. Singh, and S. Basu. Void nucleation and disentanglement in glassy amorphous polymers. Physical Review E, 82(1): 011803, July 2010. doi:10.1103/PhysRevE.82.011803
(5) D. K. Mahajan, and S. Basu. On the simulation of uniaxial, compressive behaviour of amorphous, glassy polymers with Molecular Dynamics. In- ternational Journal Of Applied Mechanics, 2(3): 515{541, September 2010. doi:10.1142/S1758825110000639
(6) D. K. Mahajan, R. Estevez, and S. Basu. Ageing and rejuvenation in glassy amorphous polymers. Journal of the Mechanics and Physics of Solids, 58(10): 1474{1488, October 2010. doi:10.1016/j.jmps.2010.07.015
(7) S. Brinckmann, D. K. Mahajan, and A. Hartmaier. A scheme to combine molecular dynamics and dislocation dynamics. Modelling and Simulation in Materials Science and Engineering, 20(4): 045001, June 2012. doi:10.1088/0965-0393/20/4/045001
(8) D. K. Mahajan, and A. Hartmaier. Mechanisms of crazing in glassy polymers revealed by molecular dynamics simulations. Physical Review E, 86(2): 021802, August 2012. doi:10.1103/PhysRevE.86.021802