Abstract

The application of spiral welded pipes in strain based design related projects has gained (economic) interest. A potential weak link is the helical seam weld region. This paper investigates the structural response of a pipe with a flawed spiral weld under remote plastic tensile deformation, resulting in a mixed mode flaw tip loading. A combined numerical-experimental framework is proposed to determine the tensile strain capacity. Based on a set of experimental and numerical data it is concluded that higher pipe forming angles are beneficial with respect to tensile strain capacity.

Keywords:
resistance curve, metals & mining, tensile strain capacity, pipe specimen, specimen, displacement, int pipeline conf, spiral, van minnebruggen, crack extension
Subjects:
Pipelines, Flowlines and Risers, Information Management and Systems
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2015. International Society of Offshore and Polar Engineers
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