×
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.

# Calculating Shear Strength of a Material?4

## Calculating Shear Strength of a Material?

(OP)
How do you calculate for the Ultimate Shear Strength of a Material?

I have a SS416 heat treated at 800 (From Machinery Handbook) and now has:

Yeild Strength: 150000psi
Ultimate Tensile Strength: 195000psi
Hardness: C41, 390Bhn

One book says:
Ult. Shear Strength = 0.57 x Material Yield Strength

Machinery's Handbook says:
Ult.Shear Strength = 0.50 x Ult. Tensile Strength

They are both close in terms of results but which one if at all?!

### RE: Calculating Shear Strength of a Material?

Hi mikerascally

I would use the 0.5xUlt.Tensile strength

regards

desertfox

### RE: Calculating Shear Strength of a Material?

Ultimate shear strength is commonly estimated to be 0.6*UTS.  The 0.57*TYS is probably taken from the von Mises/distortion energy/octahedral shear stress criterion, and it should be stated as shear yield strength = 0.577*tensile yield strength.

### RE: Calculating Shear Strength of a Material?

0.5 times tensile is the safe way to do it, as advocated in the "Introduction to Aircraft Stress Analysis" course at Cranfield, UK.

For round bar in shear (as used in the ESDU MMDH) anything up to 0.7 times may be achieved.

Examining MIL-HDBK-5, which has a mixture of shear test methods, with quite a lot of punch shear through sheet, 0.6 times is sort-of-usual.

-RP.

### RE: Calculating Shear Strength of a Material?

TVP is correct.

The Maximum Distortion Energy Theorem shows that shear stress is approximately 0.577 that of normal yield strength.  I've found this to be highly accurate comparing computed to laboratory results.

Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc

### RE: Calculating Shear Strength of a Material?

What kind of Factor of Safety are you using on your Ult. Shear Strength

### RE: Calculating Shear Strength of a Material?

I think part of the answer lies in how you
want to use this.  Do you want the part
to shear as in a shear pin or do you want it
not to shear.

#### 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!