Dr. Samir Chandra Roy

Assistant Professor
Mechanical Engineering/Centre for Materials and Energy Engineering
scroy@iitrpr.ac.in

Room : Design Studio Lab, Opposite to Lecture Hall-10, IIT Ropar, Punjab-140001Mo: +91-8847658419

Biography

Samir Chandra Roy received his bachelor degree in Production Engineering from the National Institute of Technology Agartala in 2010. He had been awarded an Institute Gold Medal for topping the class with first class and distinction. He also received a gold medal from the Alumni Association of NIT Agartala in 2010. Then he joined the Metallurgical and Material Engineering department of Jadavpur University, Kolkata in the year of 2010 for pursuing his master degree. He carried out his one year of research work at the Indira Gandhi Centre for Atomic Research (IGCAR) Kalpakkam to work in the field of fatigue and fracture under the guidance of Dr. R Sandhya (Senior Scientist, Fatigue Studies Section) and Prof. S K Ray (Ministry of Steel Chair Professor, Jadavpur University). He presented his work at the 6th international conference on Creep, Fatigue and Creep-Fatigue Interaction (CF-6) held in Chennai and won the best poster paper presentation award. He successfully completed his master degree in 2012 and received University Gold Medal for being the year topper in the Metallurgical and Material Engineering department of Jadavpur University. After that, he got chances at IIT Madras and IIT Kharagpur to pursue his PhD, but opted for the University Grenoble Alpes in France to work with Prof. Marc Fivel (Laboratory SIMaP) and Prof. Jean-Pierre Franc (Laboratory LEGI). His PhD work was about experimental and FEM investigations of Cavitation Erosion of metallic alloys, which was part of a NICOP (Naval International Cooperative Opportunities in Science and Technology Program) project funded by the Office of Naval Research (ONR), USA and Office of Naval Research Global (ONRG). He successfully defended his PhD thesis in December 2015, with a specialization in Materials, Mechanical and Civil Engineering, Electrochemistry (2MGE) defined by the University Grenoble Alpes, France. After that, he came back to India and received the DST Inspire Faculty Award of July 2016 Session. He is currently an Assistant Professor in the Mechanical Engineering department of Indian Institute of Technology Ropar.
 
At IIT Ropar:
Teaching Course:
ME101: Engineering Mechanics --> First-year B.Tech. students of 2017 batch
GE102: Workshop Practice --> First year B.Tech. students of 2017 Batch
MEP103: Engineering Communication (/Machine Drawing) --> Second-year B.Tech. students of 2016 Batch

Areas of Research

Creep, Fatigue and Fracture: Experimental and Numerical studies
Mechanical behavior of materials at elevated temperature
Mechanical and microstructural characterization of material
Experimental and numerical studies of cavitation pitting/erosion in fluid machineries
Instrumented Indentation Testing (IIT) and materials evaluation
Finite Element Analysis and Constitutive modeling
Very high rate deformation of material and characterization

Education

Ph.D. (2012-2015): University Grenoble Alpes, Grenoble, France
M.E. (2010-2012): Metallurgical Engineering, Jadavpur University, Kolkata, India
B.E. (2006-2010): Production Engineering, National Institute of Technology Agartala, India

Work Experience

Assistant Professor, Indian Institute of Technology Ropar, India, May 2017-Present

Other Information

If you have common sense and open mind without any prejudices, then you can become a great researcher with hard work and dedication. If you have these qualities, feel free to contact me. M.Tech. and B. Tech. students are also welcome to participate.
 
Ongoing Project-1:
Title: Experimental and numerical analysis of high-temperature deformation behavior of 304LN stainless steel under cyclic loading condition.
5 years project funded by Department of Science and Technology, Govt. of India along with INSPIRE FACULTY AWARD
PhD student working on the project: Ms. Neha Mehani under Centre for Materials and Energy Engineering
 
The objective is to experimentally analyze the Fatigue, Creep and Creep-Fatigue interaction behavior of the material at room and elevated temperature. Mechanistic and microstructural analyses (using Optical Microscopy, SEM, TEM and XRD) will be done in order to reveal the Masing and non-Masing behavior of the material, and then to use such knowledge in developing constitutive models (continuum mechanics based/FEM) for characterizing the Masing/non-Masing behavior. It is a very challenging work to develop new constitutive equations, but we will definitely make progress.
AISI 304LN austenitic stainless steel is the material used for Primary Heat Transport Piping (PHTP) of Indian Advanced Heavy Water Reactor (AHWR). Fatigue occurs during the start-up and shut-down cycle of the power plant, and creep may occur during operation at high temperature. However, the maximum service temperature is less (~285 ºC) compared to the melting temperature (~1450 ºC). On the other hand, the design life of Indian AHWR is ~100 years. Hence to extrapolated short duration accelerated test data for such a long period is a matter of research while considering the creep that is interacted by fatigue. Another objective to study the effect of creep into the fatigue behavior of 304LN SS at elevated temperature (greater than 500 ˚C) and numerical prediction of the hysteresis loop of such creep-fatigue interaction.
Ideally, the candidate should have the basic knowledge of metallurgical and material engineering, and must be familiar with fatigue, creep and fracture of metallic alloys, and microstructural analysis using SEM, TEM and XRD etc. He/she must have great interest in numerical coding (especially in FORTRAN and PYTHON) for developing constitutive model and implementing in Finite Element Method (FEM) based software ABAQUS. Previous experience of UMAT (and VUMAT) writing will be highly preferred. 
 
Project-2:
Experimental and Numerical studies of cavitation erosion behavior of materials
 
Cavitation erosion is commonly observed in diesel engine injector-nozzle system, diesel engine cylindrical liner, hydraulic turbines, pump impellers, ship propellers, valves, heat-exchanger tubes, and other hydraulic structures. Cavitation is defined as the explosive growth and intense collapse of bubble nuclei in a liquid due to rapid and large variations of ambient pressure. In a homogeneous liquid, free from any nucleus, cavitation bubbles are generated due to phase change causes by a sudden drop in liquid pressure below vapor pressure, and then they undergo violent collapse when suddenly enter into a high pressure region. Collapse of such a cavitation bubble produces a high impact load (~GPa), of very short duration (~µs), over a small region (~µm), that leads to plastic deformation of the solid wall in the form of a cavitation pit. Repetition of such phenomena over time, in a cavitating flow, leads to fatigue of the target material, leading to damage accumulation and then failure in terms of material removal. Prediction of such material loss over time is a current subject of research, as well as an industrial problem that remains to be a challenging issue till date. Moreover, development of new materials for better cavitation erosion resistance has been another challenging issue, as the mechanism of material failure under cavitation erosion is not very well established, because of the complex nature of cavitation bubble collapse and fluid-structure interaction. The current research aims at those two aspects mentioned above.
 
Ph.D./M.Tech./B.Tech. students: if you are keen to make some contribution in the field of cavitation erosion and Fatigue-Creep-Fracture, feel free to write me. 
 

Selected Publications/Patents

Journal Papers/Conference Papers/Proceedings
1. S. C. Roy, S. Goyal, R. Sandhya, S. K. Ray, "Low cycle fatigue life prediction of 316 L(N) stainless steel based on cyclic elasto-plastic response", Nuclear Engineering and Design 253, 219–225, (2012); doi:10.1016/j.nucengdes.2012.08.024.
2. S. C. Roy, S. Goyal, R. Sandhya, S. K. Ray, “Analysis of Hysteresis Loops of 316L(N) Stainless Steel under Low Cycle Fatigue Loading Conditions”, Procedia Engineering, 55, 165-170, (2013); doi:10.1016/j.proeng.2013.03.237. Won the best paper conference award.
3. M. Fivel, J. -P. Franc, S. C. Roy, “Towards Numerical Prediction of Cavitation Erosion”, Interface Focus, 5, 20150013, (2015); DOI: 10.1098/rsfs.2015.0013.
4. S. C. Roy, J. -P. Franc, C. Pellone, M. Fivel, “Determination of cavitation load spectra – Part 1: Static finite element approach,” WEAR, 344-345, 110-119, (2015); doi:10.1016/j.wear.2015.09.006.
5. S. C. Roy, J. -P. Franc, N. Ranc, M. Fivel, “Determination of cavitation load spectra – Part 2: Dynamic finite element approach,” WEAR, 344-345, 120-129, (2015); doi:10.1016/j.wear.2015.09.005.
6. S. C. Roy, J. -P. Franc, M. Fivel, “Cavitation erosion: using the target material as a pressure sensor”, Journal of Applied Physics 118, 164905 (2015); doi: 10.1063/1.4934747.
7. S. C. Roy, S. Goyal, R. Sandhya and S. K. Ray, Analysis of Hysteresis Loops of 316L(N) Stainless Steel under Low Cycle Fatigue Loading Conditions, 6th international conference on Creep, Fatigue and Creep-Fatigue Interaction (CF-6), 22-25 January 2012, Mamallapuram, Tamil Nadu, India.
8. S. C. Roy, M. Fivel, J. –P. Franc, C. Pellone, M. Verdier, Cavitation Pitting: Using the Target Material as a Sensor, 13th U.S. National Congress on Computational Mechanics (USNCCM13), July 26-30, 2015, San Diego, California, USA.
9. S. C. Roy, M. Fivel, J. –P. Franc, C. Pellone and N. Ranc, Numerical estimation of impact load and prediction of material loss in cavitation erosion, International Conference on Mechanics of Complex Solids and Fluids (ICMCSF), May 17-22, 2015, Lille, France.
10. S. C. Roy, M. Fivel, J.-P. Franc and C. Pellone, “Cavitation induced damage: FEM inverse modeling of the flow aggressiveness”, 11th International Conference on Flow Dynamics, 8-10 October 2014, Sendai, Japan.
11. S. C. Roy, M. Fivel, J. - P., Franc and C. Pellone, “Finite Element Analysis of cavitation pits to estimate bubble collapse pressure”, SHF Conference on Hydraulic Machines and Cavitation/Air in water pipes, 5-6 June 2013, Grenoble, France.
12. S. C. Roy, R. Das, R. Sen, S. Paul, “Vegetable oil as alternative cutting fluid in machining-some aspects of quality”, 3rd international and 24th AIMTDR conference, 13-15 December 2010, Visakhapatnam, India.