Modeling of plasticity and fracture behavior of X65 steels: seam weld and seamless pipes
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10704_2018_303_ReferencePDF.pdf
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Checksum (MD5)
07c555ab24cccf30e6f137efc938e6c3
Author(s)
Paredes, Marcelo
Lian, Junhe
Wierzbicki, Tomasz
Cristea, Mihaela E
Münstermann, Sebastian
Darcis, Philippe
Date Issued
July 27, 2018
Publisher
Springer Netherlands
Version
Author's final manuscript
Abstract
Abstract
A non-associated/associated flow rule coupled with an anisotropic/isotropic quadratic yield function is presented to describe the mechanical responses of two distinct X65 pipeline steels. The first as a product of the cold-rolling forming (UOE) process also known as seam weld pipes and the second as a result of high temperature piercing process called seamless tube manufacturing. The experimental settings consist of a wide range of sample types, whose geometric characteristics represent different state of stresses and loading modes. For low to intermediate stress triaxiality levels, flat specimens are extracted at different material orientations along with notched round bar samples for high stress triaxialities. The results indicate that despite the existing differences in plasticity between materials due to anisotropy induced processes, material failure can be characterized by an isotropic weighting function based on the modified Mohr–Coulomb (MMC) criterion. The non-associated flow rule allows for inclusion of strain directional dependence in the definition of equivalent plastic strain by means of scalar anisotropy (Lankford) coefficients and thus keeping the original capabilities of the MMC model.
MIT Department
Massachusetts Institute of Technology. Impact and Crashworthiness Laboratory
Massachusetts Institute of Technology. Department of Mechanical Engineering
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DOI of Published Version
https://doi.org/10.1007/s10704-018-0303-x
