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Fracture Limit State

Module by: Michael Terk

Summary: (Blank Abstract)

Introduction to Fracture

The limit state of fracture must be considered in tension members to prevent failure from breaking. "To prevent fracture, the stress on the net section must be less than the tensile strength F u F u ."

Equations for Fracture

φ t =0.75 φ t 0.75 (1)
P n = F u A e P n F u A e (2)

The resistance factor is smaller for fracture than it was for yielding because failure in fracture is more sudden and serious than in yielding. Here the design strength of the tension members is φ t P n φ t P n where:

  • A e A e = effective net area, in. 2 in. 2
  • F u F u = specified minimum tensile stress, ksi

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