The two-parameter approach for fracture mechanics: Some industrial applications

Abstract

The importance of the two-parameter approach in linear elastic fracture mechanics analysis is increasingly being recognized for fracture assessments in engineering applications. The consideration of the second parameter, namely, the elastic T-stress, allows estimating the level of constraint at a crack or notch tip. It is important to provide T-stress solutions for practical geometries to employ the constraint-based fracture mechanics methodology. In the present, the two-parameter approach solutions are provided for some industrial applications to (i) Assess a gouge defect in a pipe submitted to internal pressure, (ii) A V-shaped notch in the case of surface defects in a pressurised pipeline, (iii) The crack paths and a particular attention are given in the case of hydrogen embrittlement, (iv) To extend the analysis of constraint effect in the influences of notch radius on the Material Failure Master Curve (MFMC) and (v) To investigate the effects of non-singular stress (T-stress) on the mixed mode (I + II) of fracture near notch-tip fields elastic compression-sensitive under plane stress and small scale yielding conditions.