Bendingggg

Question 1

Assumptions in the engineers theory of bending

Answer 1

• beams bend to constant radius of curvature 1/R
• plane sections remain plane (no slippage)
• material has linear constitutive equation: Young’s modulus = stress/strain

Question 2

When and where instability occurs

Answer 2

• Buckling can occur when a light or thin component is subjected to a compressive load
• shear loads have tensile and compressive components so may also buckle
• in biomechanics, buckling is most likely to occur in long slender columns

Question 3

Stability in bending

Answer 3

Stability refers to the tendency of a system to return to its original state after it has been disturbed
Moment from tension: stable
- only one solution, strong desire to return to original position
Compressive buckling: unstable
- weakly resistant to compression, many solutions, weak desire to return to original position