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Material Property: Fracture Toughness

Material Property: Fracture Toughness

Material Property: Fracture Toughness

(OP)
Could anyone point me to a formula or other relation that specifically relates Notched Izod Impact Strength [J/cm] to Fracture Toughness [MPA-m^1/2].  If it also relates Charpy I'd consider it a bonus.

Is this a direct relation?  Is fracture Toughness derived from the Izod or Charpy testing methods?

I've done some online and offline searches but no formulas are presenting themselves.

Thanks in advance.

RE: Material Property: Fracture Toughness

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