Fracture mechanics parameters are used for experimental, numerical and analytical risk
assessment of structural integrity and life of oil drilling rig welded pipe with a crack. As a
simple analytical tool, the Failure Assessment Diagramme (FAD) has been applied to
assess probability of pipe failure, using the ratio of linear elastic fracture mechanics
parameter, KI, and its critical value, K Ic, in relation to the ratio of applied stress and its
critical value. Alternatively, the ratio of J integral, evaluated experimentally and numerically …