Ductile rupture of prestrained X100 pipeline steel sheets
نویسندگان
چکیده
Abstract. The mechanical and damage behavior of a X100 steel after prestrain is studied in this work. Experimental results show both a plastic and rupture anisotropy: the T direction exhibits a higher ultimate stress but the lowest ductility and toughness. Prestrain reduces ductility and crack growth resistance. A model able to represent the plastic and damage behaviour of the material before and after prestrain is proposed. The model incorporates plastic anisotropy, kinematic hardening, void growth of the primary cavities, nucleation of secondary voids on carbides. Using the model after implementation in a FE software, allows to reproduce experimental trends.
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