Uncertainties in Swift hardening law parameters and their influence on the flow stress and the hole expansion behavior of dual phase (DP600) steel specimens
Dilip K. Banerjee, Kali Prasad, Deepak Kumar, Krishnaswamy Hariharan
Swift hardening law is one of the most widely used phenomenological models to describe flow stress-strain behavior in sheet metal forming simulations. In the present study, a statistical approach was used to investigate the effect of material property variation on estimating the Swift hardening law parameters. Uncertainties in the flow stress were estimated with the use of Monte Carlo simulation. A detailed sensitivity analysis was performed to determine the most sensitive parameter affecting the flow stress estimation. Further, the computed hardening curve was used to simulate the hole expansion deformation process. The effects of material property variation on the thinning rate of the sheet with punch travel was estimated for mean (mu) and standard deviations (sigma) for determining (+/- 1 sigma, +/- 2 sigma) statistical limits. Computed strain measurements were compared with the experimentally measured data and a reasonable agreement was achieved.
, Prasad, K.
, Kumar, D.
and Hariharan, K.
Uncertainties in Swift hardening law parameters and their influence on the flow stress and the hole expansion behavior of dual phase (DP600) steel specimens, Journal of Materials Engineering and Performance, [online], https://doi.org/10.1007/s11665-022-07793-2, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933734
(Accessed December 3, 2023)