Hybrid fitting-numerical method for determining strain-hardening behavior of sheet metals

The uniaxial tensile test is well-established for experimentally identifying the stress–strain relationship for sheet metals. Conventionally, true stress–strain data obtained from the test are used to identify the hardening law's parameters using the curve-fitting method. Extrapolation using the identified hardening law describes the stress–strain relationship at large strains; however, it varies widely, depending on the selection of hardening...