1.

The form of microcrack nucleation equation is_________

A. ( <sub>s</sub>- <sub>i</sub>)nb = 2 <sub>s</sub>
B. ( <sub>s</sub>- <sub>i</sub>)nb = 3 <sub>s</sub>
C. ( <sub>s</sub>- <sub>i</sub>)nb = 4 <sub>s</sub>
D. ( <sub>s</sub>- <sub>i</sub>)nb = 8 <sub>s</sub>
Answer» B. ( <sub>s</sub>- <sub>i</sub>)nb = 3 <sub>s</sub>


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