Prestrain effect of anisotropic ductile damage in API grade X100 line pipe steel

Abstract : In this thesis the influence of prestrain on anisotropic ductility and fracture toughness has been evaluated for API grade X100 line pipe steel. A omprehensive experimental investigation of microstructure, mechanical properties and fracture mechanisms has been carried out. A phenomenological model combining isotropic and kinematic hardening with anisotropic yield function has been developed, in order to represent anisotropic hardening behavior of the high strength steel. Additionally, a damage model incorporating anisotropic damage has been established for representation of prestrain effect on ductility and toughness of the X100 steel. The developed models could predict the bending capacity and the ductile fracture toughness of the cold-formed line pipes.
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Yasuhiro Shinohara. Prestrain effect of anisotropic ductile damage in API grade X100 line pipe steel. Other. Ecole Nationale Supérieure des Mines de Paris, 2014. English. ⟨NNT : 2014ENMP0019⟩. ⟨pastel-01073824⟩

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