×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Reduction of Bolt Allowable in Lap Joint with packer in shear load

## Reduction of Bolt Allowable in Lap Joint with packer in shear load

(OP)
In a structural Steel or Aluminium Lap Joint subject to shear load, with a shim (packer) in the joint, what is the Reduction in the bolt allowable load when the packer is thick (more then 15% of bolt diameter). What is the method to calculate the bolt stress when the packer (shim) is more then about 15% the bolt diameter?.

### RE: Reduction of Bolt Allowable in Lap Joint with packer in shear load

structural Aluminium Lap Joint?

### RE: Reduction of Bolt Allowable in Lap Joint with packer in shear load

I would suggest that you carry out 2 checks.
1) Calculate bending stresses in the bolt based on the bolt being bent into an s-shape (assume head and nut fixed in rotation and reaction forces at mid-thickness of plates) and then check for combined (bending) tension plus shear in the bolt using the normal formulae.
2) Check stresses if the entire bolt rotates (as seen from the edge of the plate) without bending.  This will cause additional bearing stresses on the edges of the holes and additional tension on the bolt.

### RE: Reduction of Bolt Allowable in Lap Joint with packer in shear load

(OP)
The bolts/rivets can be either steel or aluminium, the plates are aluminium

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!