1. Ph.D. Research Scholar, Dept. of Civil Engineering, Indian Institute of Technology Delhi, New Delhi 110 016, India (corresponding author).
2. Assistant Professor, Dept. of Civil Engineering, Indian Institute of Technology Delhi, New Delhi 110 016, India.
3. Professor, Dept. of Aerospace Engineering, Univ. of German Armed Forces, Neubiberg, 85577 Munich, Germany.
4. Former Director, Advanced Materials and Processes Research Institute, Council of Scientific and Industrial Research, Hoshangabad Rd., Bhopal 462 064, India.