1. Professor, Dept. of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711 103, India (corresponding author).
2. Research Scholar, Dept. of Aerospace Engineering and Applied Mechanics, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711 103, India.
3. Assistant Professor, Dept. of Civil Engineering, Univ. Institute of Technology, and Univ. of Burdwan, Golapbag(N), Burdwan, West Bengal 713104, India.
4. Retired, Professor, Dept. of Civil Engineering, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, West Bengal 711 103, India.