Steel tables for calculating axle diameter

Click For Summary
SUMMARY

The discussion focuses on calculating the axle diameter using bending moments and tensile strength, specifically employing the equation Sx = M/Fy, where Sx is the plastic modulus, M is the bending moment, and Fy is the tensile strength of the material. Participants emphasize the importance of consulting steel tables for selecting the appropriate diameter of steel tube, with references to resources like Machinery's Handbook and matweb.com for material properties. The conversation also highlights the necessity of considering combined stresses from bending and torsion in the design process, as well as the significance of fatigue analysis in shaft design.

PREREQUISITES
  • Understanding of bending moments and tensile strength
  • Familiarity with the equation Sx = M/Fy
  • Knowledge of combined stress analysis for shafts
  • Access to steel tables and material property resources
NEXT STEPS
  • Research the use of Machinery's Handbook for quick calculations in shaft design
  • Study combined bending and torsional stress analysis techniques
  • Explore material properties on matweb.com for specific steel grades
  • Learn about fatigue analysis in machine design, referencing textbooks like Shigley or Spotts
USEFUL FOR

Mechanical engineers, design engineers, and students involved in shaft design and analysis, particularly those focusing on bending and torsional stresses in steel components.

  • #31
Ah yes, I forgot to convert to MPa.

I am familiar with deflection however not sure how to calculate it under these parameters, could you give me some pointers?
 
Engineering news on Phys.org
  • #32
Just to be clear on one point - Is there another extension and load at the other end of the axle ?
 
  • Like
Likes   Reactions: Wilson123
  • #33
No there isn't, my design has one axle per wheel, so the other wheel is supported by a mirror image of this axle.
 
  • #34
After looking over my calculations, I've realized I had my bending moment slightly too high, therefore my bending stress is wrong. My bending stress is actually 63MPa.
 
  • #35
Do you still want any help with this problem ?
 
  • #36
@JBA has kindly provided this reference to formulas for stress and deflection in another thread . You can use these formulas for your problem as well .
 

Similar threads

Replies
33
Views
5K
Replies
37
Views
5K
  • · Replies 10 ·
Replies
10
Views
4K
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
7K
  • · Replies 9 ·
Replies
9
Views
4K
  • · Replies 4 ·
Replies
4
Views
8K
  • · Replies 2 ·
Replies
2
Views
5K