Two 16 mm thick main plates are joined by rivets using the double cover butt joint with 10 mm thick cover plates as shown in figure. Bearing failure will occur first in
Two 16 mm thick main plates are joined by rivets using the double cover butt joint with 10 mm thick cover plates as shown in figure. Bearing failure will occur first in Correct Answer <span style="">Cannot be estimated</span>
Explanation:
Double cover butt joint:
(i) It is the most efficient joint because the line of actions of two forces are same and the connection is symmetrical with respect to the x-axis so there is no eccentricity between action and reaction.
(ii) The bolts are subjected to double shear and bearing.
Case 1: Cut the joint at LHS of (1) - (1) and consider FBD of left portion:
From the above free body diagram, we find that the entire applied load P is taken by the main plate only at (1) - (1), so critical section for the main plate is at (1) - (1) where cross-section area is minimum.
Case 2: Cut the joint at RHS of (3) - (3) and consider the left portion of (3) - (3):
From the above free body diagram, at (3) -(3) entire applied load is taken by cover plates only. so critical section for the cover plate is taken at (3) -(3) to find strength of cover plate.
Note:
in question, nothing is mentioned that is at which section we have to calculate the strength, so can not be estimated correct failure material.
