1. Professor, Applied Mechanics, Dept. of Mathematics, Faculty of Education, Ain Shams Univ., Roxy, Cairo 00202, Egypt.
2. Lecturer, Applied Mechanics, Dept. of Mathematics, Faculty of Education, Ain Shams Univ., Roxy, Cairo 00202, Egypt.
3. Assistant Professor, Applied Mechanics, Dept. of Mathematics, Faculty of Education, Ain Shams Univ., Roxy, Cairo 00202, Egypt (corresponding author).
4. M.Sc. Student, Dept. of Mathematics, Faculty of Education, Ain Shams Univ., Roxy, Cairo 00202, Egypt.