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

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1.	In the case of plane strain, 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, ν is the poison’s ratio, and E is the young’s modulus).
A.	K=δE
B.	K2=δE/(1-ν2)
C.	K=(δE)/ν
D.	K=δ/E
Answer» C. K=(δE)/ν

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