Flexural strength

From Wikipedia, the free encyclopedia

Flexural strength is also known as modulus of rupture, bend strength, or fracture strength. Flexural strength is measured in terms of stress, and thus is expressed in pascals (Pa) in the SI system. The value represents the highest stress experienced within the material at its moment of rupture. In a bending test, the highest stress is reached on the surface of the sample. For a rectangular sample under a load in a 3 pt bend setup: \sigma = \frac{3FL}{2bd^2}

  • F is the load (force) at the fracture point
  • L is the length of the support span
  • b is width
  • d is thickness

For a rectangular sample under a load in a 4 pt bend setup: \sigma = \frac{FL}{bd^2}

  • F is the load (force) at the fracture point
  • L is the length of the support (outer) span
  • b is width
  • d is thickness

[edit] See also

Languages