CRACKS AND STRAIN ENERGY

摘要

During an increment of crack extension, changes occur in the strain energy content of both near-field and far-field regions. Although an elastic system containing a crack must obey a global energy equation, some of the energy quantities within the system may have very little effect on the environment of the crack tip, which is controlled by near-field stresses. The present paper sets out to confirm this argument by showing calculations of the energy available for crack extension in two-dimensional situations.