Inversion of three-stage stress–strain relation for stainless steel in tension and compression

Nonlinear analysis of axially loaded circular concrete-filled stainless steel tubular short columns

“…Fig. 8 presented a comparison of the axial load-strain curves computed by Rasmussen constitutive model [1] and Abdella et al material model [3]. Close agreement between these two material models is achieved up to the proof stress of the stainless steel.…”

“…The inversion of the full-range three-stage stress-strain relationships for stainless steels presented by Abdella et al [3] is based on the equations proposed by Quach et al [2], which is implemented in the present fiber element model. The three-stage stress-strain curve for stainless steels in compression is shown in Fig.…”

“…The accuracy of full-range two-stage stress-strain curves proposed by Rasmussen [1] and three-stage stress-strain relationship presented by Abdella et al [3] have been investigated using the present fiber element analysis program developed. Table 2 shows a comparison of the ultimate axial strengths of CFSST columns determined using these two material models for stainless steels.…”

“…The inversion of the three-stage stress-strain relationships for stainless steels given by Abdella et al [3] expresses the stress as a function of strain. This gives a convenient implementation of the material laws in numerical models.…”

“…In this paper, the inversion of the three-stage stress-strain relationships for stainless steels [2,3] is incorporated in the fiber element model for simulating the nonlinear inelastic behavior of CFSST short columns under axial compression. The fiber element model accounts for the effects of concrete confinement and high strength concrete.…”