1. DEPARTMENT OF MECHANICAL AND MANUFACTURING ENGINEERING
UNIVERSITY OF NAIROBI
DEPARTMENT OF MECHANICAL AND MANUFACTURING ENGINEERING
ENGINEERING DESIGN II
FME 461
PART 11
GO NYANGASI
January 2007

2. BI-AXIAL STRESS AND DE THEORY
APPLICATION TO BENDING AND TORSION OF SHAFT

3. EQUIVALENT STRESS BI-AXIAL STRESS
The significant stress, referred to as equivalent stress or Von-Mises stress,
Expressed IN TERMS OF STRESS ELEMENTS

4. DISTORTION ENERGY THEORY PLANE STRESS SITUATION
For one zero normal stress equation becomes

5. BENDING AND TORSION OF SOLID CIRCULAR SHAFT
Substituting for stress elements

6. BENDING AND TORSION OF SOLID CIRCULAR SHAFT
Substituting yields

7. DESIGN EQUATION
Required dimensions are then expressed