1. Dept. of Mechanical Engineering, Shri Vishnu Engineering College for Women, Vishnupur, Bhimavaram 534202, India (Corresponding author) e-mail: harinitw@gmail.com
2. Dept. of Mechanical Engineering, National Inst. of Technology, Warangal 506004, India
3. Dept. of Mechanical Engineering, Shri Vishnu Engineering College for Women, Vishnupur, Bhimavaram 534202, India