Fracture criterion mechanics, failure assessment

Beside these versions there are computer codes which take into account coupling effects (first solving the heat transfer problem, then the mechanical one) and software for special investigations and applications (e.g. to determine field quantities that allow to compute related quantities to get some information about strength or failure assessment or characteristics in fracture mechanics like K, J-integral, strain energy density criterion, e.t.c.). 

Fracture mechanics is a study of the strength of structures which include flaws such as cracks and voids where stresses can be said to be singular. Fracture mechanics applies criteria to assess whether the conditions are such that failure will occur at these points, one such criterion being the critical energy release rate, G. Other criteria are also available, including crack opening displacement measurements, the J integral, and stress intensity measurements. 

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