Design of Riveted Joints:

Rivet Value

Rivet value (R) is the least value of the strength of a single rivet and is smaller of the two value, Fs (strength in shearing) or Fbr (strength in bearing).

Unwin's Formula

It gives the nominal diameter of a rivet in mm, and is begin as follows :

d_n  = 6.04        √t

while t is the thickness of the smallest of the joining plates (in mm).

[As the rivet sizes available that are 12, 14, 16, 18, 20, 22, 24, 27, 30, 33, 36, 39, 42 mm the value obtained from Eq. is adjusted to the next higher value.]

Group of Rivets

Strength of a group of rivets is equal to the strength of one rivet multiplied by the number of rivets,

i.e.       F_group = n × F _single

Generally, the bearing value of a rivet lies between its single and double shearing values

i.e.       F_s < F_br < 2F_s