According to Irwin’s correction of plasticity at the crack tip, the effective crack length is given as the actual crack length plus the radius of the plastic zone. The radius of the plastic zone (rp) in case of plane strain is given as ________

According to Irwin’s correction of plasticity at the crack tip, the

1.	According to Irwin’s correction of plasticity at the crack tip, the effective crack length is given as the actual crack length plus the radius of the plastic zone. The radius of the plastic zone (rp) in case of plane strain is given as ________
A.	rp=1/2 K2/σo2
B.	rp=1/6 K2/πσo2
C.	rp=1/8 K2/σo
D.	rp=1/2 K/σo
Answer» C. rp=1/8 K2/σo

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According to Irwin’s correction of plasticity at the crack tip, the effective crack length is given as the actual crack length plus the radius of the plastic zone. The radius of the plastic zone (rp) in case of plane strain is given as ________

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