The stress-strain diagram for a steel rod is shown and can be described by the equation ε=0.20(1e-06)σ+0.20(1e-12)σ3 where s in kPa. Determine the yield strength assuming a 0.5% offset.
(a) For 0.5% =0.005mm/mm
5000=0.20σ+0.20(1e-6)σ3 solving for σ=2810.078kPa.
Structural system identification is a multidiscipl...