Torsion Flashcards
1
Q
What is torsion?
A
When a bar with a cylindrical or square-shaped head is twist.
2
Q
What is the shear strain equation in a torsion example?
A
y=rθ/L
3
Q
What is the shear stress equation in a torsion example?
A
τ=Gθr/L
4
Q
What are the 5 assumptions for a cylindrical shaft undergoing torsion?
A
- Straight and uniform with a constant cross-sectional area
- toque is constant across the shaft
- The shafts area remains circular throughout torsion
- radial line remain radial in torsion
- deformation is by rotation of one cross-sectional plane to the next and the planes remain normal and longitudinal axis to the shaft
5
Q
How will a ductile rod fail differently under torsion than uniaxial tension?
A
45 degrees in uniaxial
In half for torsion
6
Q
How will a brittle rod fail differently under torsion than uniaxial tension?
A
Flat and in half uniaxial
45-degree angle torsion
7
Q
What will the normal and shear stress transformation equations be in a torsion example?
A
Normal stress=τsin(2θ) Maxium at 45
shear stress=τcos(2θ) maxium at 0
