Rohit Rai

Work:                                                                                        Home:
4 Steidle Building  10 Vairo Blvd., Apt# 202D
University Park, PA 16802  State College, PA, 16803
(814) 865 3617 (814) 321 5924
Email: rohit@psu.edu
Web: http://www.personal.psu.edu/rur127/

 
Education:
The Pennsylvania State University, University Park, PA;                      anticipated graduation: May 2008
Ph.D. in Materials Science and Engineering
GPA: 3.97/4.0   
Thesis: “Modeling of heat and fluid transport in high energy beam keyhole mode welding process”

    
Indian Institute of Technology, Kharagpur, INDIA                                             Graduated: May, 2004
Bachelor of Technology (Honors) in Metallurgical and Materials Engineering
GPA: 8.06/10.0
Thesis: “Multi-objective Genetic Algorithm for Roll Schedule Optimization in a Hot Strip Mill”

 
Experience
1

Research Assistant, (Aug 2004 – present).Pennsylvania State University, University Park, PA. Performed research under Professor Tarasankar DebRoy to develop a numerical model for reliably predicting weld characteristics during high intensity laser or electron beam keyhole mode welding using genetic algorithm as an optimization tool. Modeling studies of keyhole mode welding process can help understand the formation of porosity in keyhole welds and help reduce their occurrence in addition to the prediction of weld geometry, temperature distribution, cooling rates, and residual stresses in the work-piece.
2

Teaching Assistant, Pennsylvania State University, “Engineering Materials” (Spring 2005, Fall 2006, Spring 2008) – assisted in making presentations, designed quizzes, graded answer books, helped students with their doubts, and maintained a course website.
3

Undergraduate Research, June 2003 to May 2004. Indian Institute of Technology, Kharagpur, INDIA. Used genetic algorithms to optimize roll-scheduling at hot-strip mill to minimize distortion .
4

Summer Training, June 2003 - July 2003. TATA MOTORS, Jamshedpur, INDIA. Studied distortion of gear components during heat treatment.

 
Computer Skills
Programming Languages:  C, FORTRAN, Java.
Technical Software: Ansys, Tecplot, Mathematica.
Computational Methods: Genetic algorithm based optimization, finite element, finite difference and control volume methods.

                                 

Publications

1

R. Rai, S.M. Kelly, R.P. Martukanitz, T. DebRoy, A convective heat transfer model for partial and full penetration keyhole mode laser welding of a structural steel, accepted for publication in Metallurgical Transactions A (pdf).

2

R. Rai, J.W. Elmer, T.A. Palmer, T. DebRoy, Heat transfer and fluid flow during keyhole mode welding of tantalum, Ti-6Al-4V, 304L stainless steel, and vanadium, Journal of Physics D: Applied Physics, 40, 5753-5766, 2007 (pdf)

3

R. Rai, G.G. Roy, T. DebRoy, A computationally efficient model of convective heat transfer and solidification characteristics during keyhole mode laser welding, Journal of Applied Physics, 101, 054909, 2007 (pdf).

4

R. Rai, T. DebRoy, Tailoring weld geometry during keyhole mode laser welding using a genetic algorithm and a heat transfer model, Journal of Physics D: Applied Physics, 39, 1257-1266, 2006 (pdf).

5

R. Nandan, R. Rai, R. Jayakanth, S. Moitra, N. Chakraborti, A. Mukhopadhyay, Regulating crown and flatness during hot rolling: A multi-objective optimization study using Genetic Algorithms, Materials and Manufacturing Processes, 20(3), 459-478, 2005 (pdf).

 

 

 

 

 
Activities/Honors

1

 Received Kennametal Fellowship for academic excellence (2007).

2

 6th rank in Regional Mathematics Olympiad in the state of Uttar Pradesh, INDIA (1997).

3

  Served as Senior Cadet Under Officer for the Air Wing of National Cadet Corps at Indian Institute of Technology, Kharagpur (2000-2001).

4

 Actively involved with a theatre group (Banjara Theatre Group) at Indian Institute of Technology, Kharagpur, INDIA (2002-2004).

5

 Participated in National Treks (1994, 2002) organised by Youth Hostels Association of India, and a Rock-climbing course at Sainik School Ghorakhal, Nainital (1996).

6

 Member of Penn State Table Tennis club; certified for life-guard, CPR, and AED; ice-skating; swimming; and learning languages.