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Mathematics of Crack growth

Submitted by paragiitb on
  1.  How to find G (energy release rate) using wnuk's equation? by considering the fracture process zone explaining the assumptions and concept involved??
  2. can anyone explain about : Eshelby's basic assumption for finding the change of displacement after the crack tip has moved a distance x?
  3. How is the general form(equation) for singular parts of the stresses in the plane of the crack  derived (explain the breif fundamentals) ?



    all these question are in reference to the book Micromechanics of defects in solids by toshio mura