Machine Elements Design	HW 4
Student Name:	ST. NO.

1-  A cylinder has an inner diameter d= 80 mm, has A pressure of

p= (ST. No.) x 5 + 5 MPa. The cylinder head is secured by 12 bolts made of steel EN1A. Take a factor of safety SF = 6, Find the bolts size (M?). 

2- Find number of bolts (n) to carry a load of F = (ST. NO.) X 1000 N, if the bolt size is bolt size = M(ST. NO. + 1), and the bolt material is EN3, the factor of safety SF = 10.

3- 8 bolts size M10 are to withstand a tensile force F_t = (ST. NO.) x 3900 N, taking factor of safety SF = 5, Find the bolt steel material EN?

4- 10 bolts size M12 are to withstand a tensile force F_t =(ST. NO.) x 5000 N, the bolts are made of steel EN8, taking factor of safety SF= 10, find if the design is safe or not.