If S is the applied stress, c is the width of the crack and r the radius of curvature at the tip of the crack, Griffith’s crack theory gives the concentrated stress Sc as

If S is the applied stress, c is the width of the crack and r the radi

1.	If S is the applied stress, c is the width of the crack and r the radius of curvature at the tip of the crack, Griffith’s crack theory gives the concentrated stress Sc as
A.	2 S (c/r)1/2
B.	2 S (c/r)1/3
C.	S (c/r)1/2
D.	2 S (2c/r)1/2
Answer» B. 2 S (c/r)1/3

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If S is the applied stress, c is the width of the crack and r the radius of curvature at the tip of the crack, Griffith’s crack theory gives the concentrated stress Sc as

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