ANALYTICAL AND EXPERIMENTAL FRACTURE ASSESSMENT OF CARBON-STEEL PIPING WITH CIRCUMFERENTIAL THROUGH-WALL CRACKS UNDER BENDING

In this paper the true stress-strain curves of carbon steel pipes are described by a three-segment fitting method rather than the Ramberg-Os good relation for their yield plateau characteristics. Failure assessm ent curves for carbon steel piping containing circumferential through- wall cracks were obtained by different options in the CEGB/R6 approach . The J-integral was calculated using a new expression proposed by the authors. Initiation and maximum moments of piping under bending were predicted by several methods and measured by experiments. Calculated m oments were quite close to test results. Copyright (C) 1996 Elsevier S cience Ltd.