(Session 06)Mechanical Characterization of Stainless Steel Tubes thanks to a Tube Bulging Test - Validation of analytical models.

摘要

A complete mechanical characterization of stainless steel tubes is often complicated, even impossible, through usual normal tensile tests. The appraisal of the impact of the forming process and the welding step (figure 1) on the true mechanical properties and forming ability of the tube is therefore most of the time underestimated, leading to a critical or detrimental use of the tubes. Moreover, the hardening dependency to the loading history is also mistakenly neglected as the presence of a welding join. The present approach is dealing with the final wish to create analytical models which could help to characterize the effective mechanical properties of the tubes taking into account their metallurgical path. This paper constitutes the first part of the global approach and concerns the validation phase of different analytical models considering isotropic and homogeneous tubes.