As part of your work for Doug's Custom Nondestructive testing, you are working on a ceramic...

 

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As part of your work for Doug's Custom Nondestructive testing, you are working on a ceramic part for a jet engine. The material has a Yield Strength of 75,000 psi and a Plane Strain Fracture Toughness (K) of 5,000 psivin. For safety reasons you ensure the maximum applied stress will only be 1/3 of the Yield Strength. What will be the maximum crack size that will cause failure if the crack was at the surface based on this applied stress? What will be the crack size be if it is internal? Assume f= 1.4. As part of your work for Doug's Custom Nondestructive testing, you are working on a ceramic part for a jet engine. The material has a Yield Strength of 75,000 psi and a Plane Strain Fracture Toughness (K) of 5,000 psivin. For safety reasons you ensure the maximum applied stress will only be 1/3 of the Yield Strength. What will be the maximum crack size that will cause failure if the crack was at the surface based on this applied stress? What will be the crack size be if it is internal? Assume f= 1.4.

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Critical crack size is the length at particular place a crack becomes unstable ... View the full answer