Flexural stress is really important when we think about how strong something is when it bends. Let's break it down:

• What is Flexural Stress?
  Flexural stress happens when a structure bends. This creates tension (pulling) on one side and compression (squeezing) on the other side.

• Bending Equation:
  We can understand this with a simple formula:
  $M = \sigma \cdot S$
  In this formula, $M$ is the bending moment (how much bending is happening), $\sigma$ is the flexural stress (how much tension and compression there is), and $S$ is the section modulus (which helps us understand the shape of the material).

• Risks of Too Much Stress:
  If there is too much flexural stress, it can cause things like cracking or bending too much. This can make structures weak and unsafe.

So, keeping track of flexural stress is really important for building things safely and effectively!