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In turn, crack propagation patterns, as strength, are greatly affected by the mechanical and geometrical characteristics of the initial flaw.
Thus, the engineering size crack initiation is expected to be easily detected through the analysis of the strain waveform.
These basic solutions combined with superposition method enable stress intensity factors to be rapidly determined for complex loadings, as demonstrated by example engineering crack problems.
The correlation of the crack closure model with the transition of driving forces in crack advance was beneficial to unify crack closure theory and crack growth driving parameters in the near-threshold regime.
Therefore, a unified local approach is feasible to model both crack initiation and crack propagation.
A problem with this approach can be in determining how much the crack initiation and propagation is due to the strong transient forces relative to the bending or other dynamic loading.
The developed procedures simplify the analysis of the description of mechanical fields at a greater distance from the crack tip considerably.
It is revealed that the proposed simulation method can reproduce reasonably the crack initiation and propagation, and predict well the change of the mechanical behaviour due to the openings.