Articles

Evaluation of pipe bending reference stress equations

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Abstract

The use of a Failure Assessment Diagram (FAD) is widespread in the assessment of welddefects. To determine whether a defect is acceptable or not, this requires the calculation of a load ratio anda fracture ratio for the defect under consideration. Nowadays, many formulae are available to calculatethese two quantities and no clear guidance is given on which equation(s) should (not) be used. A partialclarification of this problem is achieved by comparing different reference stress equations. This article isconcerned with such comparison, for the specific case of welded pipes subjected to a bending load. A largeset of historical experimental data has been investigated in which defected pipes were subjected to anincreasing bending force until failure occurred. Two kinds of reference stress equations are considered, fullpipes subjected to a bending load and flat plates subjected to a uniform tension load. From the equationsunder consideration, the flat plate solution of Goodall & Webster and the empirical full pipe equations ofWilloughby and Wilkowski & Eiber describe the pipe failure in the most accurate way

How to Cite:

Verstraete, M., De Waele, W., Hertele, S. & Denys, R., (2010) “Evaluation of pipe bending reference stress equations”, International Journal of Sustainable Construction and Design 1(1). doi: https://doi.org/10.21825/scad.v1i1.20425