×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*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.

Students Click Here

Jobs

Calculations of a welded joint consisting of a fillet and bevel groove

Calculations of a welded joint consisting of a fillet and bevel groove

Calculations of a welded joint consisting of a fillet and bevel groove

(OP)
We manufacture towers posts with round base plates (made from T1) welded to the ends. The posts are 4" in diameter solid shaft at 55ksi and beveled at 45 degrees making a 1"X1" bevel. The posts are then welded filling the bevel followed by a 11/16" fillet. The posts are capable of taking a tensile load of 473kips. I'm tring to determine what weld wire to use such as E80 or E70. I'm having trouble determining what would be the correct shear area of this joint I should use to determine which weld wire to use. Using E70, the 11/16 fillet weld alone gives me a strength of approximately 150 kips.  But I'm unsure as to how much additional strength I get from the chamfer.  Any help would be greatly appreciated.
Thanks

RE: Calculations of a welded joint consisting of a fillet and bevel groove

Since the bevel you describe is considered a partial penetration groove weld, you can take credit for the added load carrying capacity of this as a groove weld in addition to that of the fillet weld.

RE: Calculations of a welded joint consisting of a fillet and bevel groove

review bloggett's welding design handbook from lincoln.  the handbook has been around for a long time and has invaluable inforamtion in the design of weldments.

RE: Calculations of a welded joint consisting of a fillet and bevel groove

(OP)
Metengr & rjenson,
So if the fillet only is worth 172 kips at E70, and the chamfers leg is approximatly .9" which gives 184kips.  Would my total load capability be 172+184=356kips?  I was thinking the worst shear area is the hypotenuse of the chamfer which is appoximatly 1.375" would then give 280kips using E70 wire.
I've looked through blodgett, but did not see anything that looked like the example I have.

Thanks
Robert

RE: Calculations of a welded joint consisting of a fillet and bevel groove

Actually, Blogett's book does have a section on determining weld size, which can be used to determine allowable loads. Remember, for fillet welds you need to assign a strength reduction factor of .49 if you are using the tensile strength of the weld metal (in this case 70 Ksi). For welds in tension, the strength reduction factor should be 0.74.

Regarding your combined load carrying capacity, they are not directly additive. In this case you need to take the square root of the sum the squares of the forces at 90 degree angles - the shear load across the effective throat of the partial penetration weld and the shear load across the external fillet.

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.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources