Dr. Abhishek Tiwari

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Designation: 
Assistant Professor, Room No. 318, Satish Dhawan Block, Phone: 01881-23-2410
Department: 

Department of Metallurgical and Material Engg.

 Computational Fracture Mechanics Lab

ORCID: 0000-0003-1038-4987

Email: 

abhishek.tiwari@iitrpr.ac.in>

Biography: 
Dr. Abhishek Tiwari completed B.Tech. in Metallurgy from NIT Jamshedpur (2008). He worked in Essar Steel Hazira Ltd. and Institute for plasma research. Following which, he did M.Tech. from IIT Kharagpur (2012). He worked on stress analysis of helical compression springs loaded under very high cycle fatigue condition as an IIT-DAAD fellow at Technical University Darmstadt, Germany. In his Ph.D. work on Indian Reduced Activation Ferritic/Martensitic Steels in ductile to brittle transition (DBT) regime, he developed a novel constraint loss parameter known as, 'Weibull Triaxiality' and modified analytically the master curve approach to include the events of cleavage fracture in the upper region of DBT. In the year of 2018, he started his postdoctoral work at Erich Schmid Institute of Material Sc. under Austrian Academy of Sciences in Leoben Austria, where he worked for two years. During this period, he worked on application of configurational force concept for improvement of fracture toughness. At IIT Ropar, Dr. Tiwari's main focus would be to understand the mechanics of materials and modelling of damage of materials. Other areas of research would be to design a material structure to enhance the fracture toughness using configurational force based calculations in large scale plastic, creep, cyclic and creep-fatigue conditions.
Areas of Research: 
Application of configurational forces in fracture mechanics, crack driving force calculation in polymers, large scale plasticity, creep, creep-fatigue conditions, numerical modelling of materials' mechanical behaviour using finite element analysis.
Education: 
Ph.D. (2018) Bhabha Atomic Research Centre, Mumbai, India
M.Tech (2012) Indian Institute of Technology Kharagpur, WB, India
B.Tech. (2008) National Institute of Technology Jamshedpur, Jharkhand, India
Work Experience: 
Postdoctoral Researcher (March 2018-Feb 2020)- Erich Schmid Institute, Austrian Academy of Sciences, Leoben, Austria
Lecturer (Aug. 2012-July 2013) Rajiv Gandhi University of Knowledge Technology, R K Valley, AP, India
Engineer (July 2009- Oct. 2009) Institute for plasma research, Gandhinagar, Gujarat, India
Engineer (June 2008- June 2009) Essar Steel Hazira Ltd., Gujarat, India
Selected Publications/Patents: 

1. Tiwari A, Wiener J, Arbeiter F, Pinter G, Kolednik O, "Application of the material inhomogeneity effect for improvement of fracture toughness of a brittle polymer", Engineering Fracture Mechanics 224 (2020): 106776.

2. Wiener J, Arbeiter F, Tiwari A, Kolednik O, Pinter G, "Bioinspired toughness improvement through soft interlayers in mineral reinforced polypropylene", Mechanics of Materials, 140, p.103243.

3. Tiwari A, Singh, R.N., Stahle P., "Weibull triaxiality: A novel constraint assessment parameter for cleavage fracture in ductile to brittle transition region." Fatigue & Fracture of Engineering Materials & Structures 41, no. 6 (2018): 1389-1401.

4. Tiwari A, Singh, R.N., Stahle P., "Assessment of effect of ductile tearing on cleavage failure probability in ductile to brittle transition region " , International Journal of Fracture, 209(1-2), pp.53-76.

5. Tiwari A,and Singh, R.N., "Fracture behaviour of ferritic/martensitic steels in DBT region characterized using CT and TPB specimen geometries." International Journal of Fracture, 209 no. 1-2 (2018): 241-249.

6. Tiwari A, Gopalan A., Shokry A., Singh R. N., Stahle P. (2017), "Fracture study of ferritic/ martensitic steels using weibull stress analysis at quasi-static and higher loading rates", International Journal of Fracture pp. 1-7, DOI 10.1007/s10704-017-0184-4.

7. Tiwari A, et al., "Determination of reference transition temperature of in-rafms in ductile brittle transition regime using numerically corrected master curve approach", Engineering Fracture Mechanics 142 (2015):79-92.

8. Sonak S, Tiwari A, Jain U, Keskar N, Kumar S, Singh RN, Dey GK, "Effect of pre-strain on susceptibility of indian reduced activation ferritic marten- sitic steel to hydrogen embrittlement", Journal of Nuclear Materials 465 (2015):78-82 10.

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