Discussion
Consider the following statements about the stress intensity factor:
1. It combines applied stress, crack length and a geometry factor.
2. It grows with the square root of crack length.
3. It is a material property.
Which of the statements given above is or are correct?
Answer: A
The first two are correct. The third confuses it with fracture toughness: the stress intensity factor describes the loading of a particular cracked body, while the toughness is the critical value the material can sustain.
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