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Accumulation of Damage in A336 GR5 Structural Steel Subject to Complex Stress Loading
Author(s) -
Dietrich L.,
Socha G.
Publication year - 2012
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.2011.00821.x
Subject(s) - stress space , materials science , structural engineering , stress (linguistics) , cyclic stress , strain (injury) , composite material , amplitude , yield (engineering) , finite element method , engineering , physics , constitutive equation , optics , medicine , linguistics , philosophy
Changes in the mechanical characteristics of the structural steel because of fatigue damage accumulation are investigated in this article. Cyclic loading was performed in a complex stress state. Tubular specimens were loaded by axial force and torque, with loading performed along proportional and non‐proportional paths in the strain space. Material characteristics in the form of the stress–strain curve and yield surface were determined in the ‘as received’ state and after cyclic loading. It was found that accumulation of the fatigue damage because of cyclic loading in a complex stress state along proportional and non‐proportional paths in the strain space is manifested by the increase in inelastic response. The rate of damage was found to be higher for non‐proportional (circular) loading paths than that for proportional loading with the same strain amplitude.