6. Pure Bending and Neutral Plane

Try these first

1. 1.

   Define pure bending in beams.

   Hint

   Think about the forces acting on the beam.

2. 2.

   What is the neutral plane?

   Hint

   Focus on where no stress is experienced.

3. 3.

   What does pure bending refer to?

   • Constant moment
   • no shear
   • Variable moment
   • with shear
   • Static load

   Hint

   Remember the definition.

4. 4.

   True or False: The neutral plane is where the maximum compression occurs.

   • True
   • False

   Hint

   Think about the nature of stress distribution.

5. 5.

   A cantilever beam is subjected to a uniform load. Calculate the locations of the neutral axis and the bending stresses at specific points.

   Hint

   Use the relationships between moment, stress, and position from neutral plane.

6. 6.

   If a beam experiences a bending moment causing a maximum tensile stress of 15000 psi, determine the maximum compressive stress experienced.

   Hint

   Consider the symmetry of stresses in pure bending.