×
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

Choosing material for Differential cage

thread90-425631

Choosing material for Differential cage

Choosing material for Differential cage

(OP)
In my thesis I'm designing a differential. After simulation in Catia V5 for max stresses in the cage I obtained 770MPa (112ksi) compression and 760MPa (110ksi) tensile stress. What kind of material I have to choose in order to be within max permitted stress values? What materials are used for diff cages and their properties?
Are they cast or forged? What kind of heat treatment is applied?
Could someone help with info?

Max stress in torsion for the drive shaft I obtained is 624Mp(91ksi)a.
The chosen material from Mitcalc has:
utm. tensile strength 1200Mpa (174ksi)
yield strength in tension 780MPa (113ksi)
Yield strength in bending 936MPa (135ksi)
Yield strength in shear 546MPa (79ksi)
Is this after or before heat treatment as it seems to be too low?
Is the shear strength judicious for torsion, as you see it is lower than the stress?
Thanks for help in advance!

RE: Choosing material for Differential cage

Did you more or less copy an existing design?

http://www.grumpysperformance.com/danas2.JPG

http://shop.broncograveyard.com/images/d44traclok....

Did you run CATIA Optimizer? I'm guessing the high stresses are in localized regions, so subtle geometry changes may bring handsome stress reductions for "free".
Does your loading justify ignoring fatigue strength?
Did the evaluation consideration deflections as well? Bearings and gears don't tolerate significant misalignments graciously.

4 down, 16 to go.

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
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:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close