Solve the problem in the image do it step wise in detail

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Solve the problem in the image. Do it step wise in detail. This question is from book "Fracture Mechanics - An Introduction - E. Gdoutos Springer (Page 74)"

Show that according to the Dugdale model the stress ay outside the plastic zone along the crack axis is given by 

1520_Fracture Mechanics.JPG

Reference no: EM13365646

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