Prediction of mechanical properties on large diameter welded pipes through advanced constitutive modelling
Abstract
Large diameter welded pipes are amongst the most cost effective transportation means for oil and gas. In general, one can differentiate between longitudinally (LSAW) and spirally welded (HSAW) pipes, whereby LSAW pipes are produced from plate and HSAW pipes from coil. Pipe forming involves several cold forming steps, such as (cyclic) bending and (mechanical) expansion. Obviously, the mechanical properties on pipe differ from those of the base material. Detailed understanding of how the mechanical properties evolve during pipe forming would help steel mills to target specific base material properties to ensure the final pipe strength. Therefore, an FE (Finite Element) model, capable of simulating different pipe forming processes, was developed using the commercial FE software Abaqus. Thereby, an advanced constitutive model, accounting for isotropic, kinematic and distortional hardening was implemented via a UMAT user subroutine. A reverse engineering strategy was applied to calibrate the constitutive model. The model was then used to simulate spiral pipe forming of a 28” x 16mm HSAW pipe.
- Publication:
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Journal of Physics Conference Series
- Pub Date:
- July 2018
- DOI:
- 10.1088/1742-6596/1063/1/012043
- Bibcode:
- 2018JPhCS1063a2043C