- #1

oxon88

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## Homework Statement

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A tensile load F is to be applied to a tie bar. The tie bar is 50 mm diameter. The surface of the bar has defects resulting from the manufacturing process, these have a maximum depth of 1.5 mm and have a shape factor of 1.4.

If the fracture toughness of the material used is 120 MPa m–0.5, determine the maximum load which can be applied if brittle fracture is not to occur. Use a factor of safety of 3.

## Homework Equations

Fracture toughness, K_{ic}= σ

_{f}√Mc = 120 MPa m-0.5

shape factor, Q = 1.4

surface flaw shape, M = 1.21π / Q = 2.715

**3. Attempt at an Answer**

not really sure where to start here. can anyone advise?