In the case of plane stress, the relationship between the fracture to – McqOptions

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1.	In the case of plane stress, the relationship between the fracture toughness and crack extension force is given as _______ (where K is the fracture toughness, δ is the crack extension force, and E is the young’s modulus).
A.	K=δE
B.	K2=δE
C.	K=(δE)2
D.	K=δ/E
Answer» C. K=(δE)2

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