Dataset for A Critical Evaluation of Some Constitutive Models for Finite-Element Simulation of Structural Steel Components

Contents of the dataset include experimental work on A992, its associated finite element simulation output and constitutive model parameter optimization results, and abbreviated Fortran code for a novel constitutive model used in the finite element simulations.

Experimental results consist of stress-strain data from uniaxial material coupons, force-displacement data for circumferential notches, and force, displacement, strain, and laser-related sensor data for a set of small-scale configured components; the components are grouped as beam, cored, and planar notched specimens. Detailed descriptions regarding the data, specimen geometry, loading history, and sensor placement for the material coupons, circumferential notches, and configured components are found in the readme files of their respective directories.

Simulation results were produced using five different constitutive models: 1) 𝐿𝐾, 2) 𝐿𝐾+ 𝑁𝐿𝐼(𝑝), 3) 𝑁𝐿𝐾2 + 𝑁𝐿𝐼(𝑝), 4) 𝑁𝐿𝐾2(𝑝, 𝑞) + 𝑁𝐿𝐼(𝑝, 𝑞), and 5) 𝑁𝐿𝐾2(𝑝, 𝑞) + 𝑁𝐿𝐼(𝑝, 𝑞) + 𝑌𝑃, where LK, NLK, and NLI denote linear kinematic and nonlinear kinematic hardening, and nonlinear isotropic hardening rules, respectively; the digit specifies the quantity of backs stresses; p and q represent a dependence on accumulated plastic strain and the plastic strain range memory surface radius, respectively; YP indicates the model is equipped with transient hardening rules to capture the yield point phenomenon. For each of the five models, results include finite element force-displacement predictions of the configured components, in addition to measured and predicted stress-strain curves for the uniaxial material coupons following the optimization of constitutive model parameters. Note the optimized parameters are identical to those used in the adjacent finite element simulations. See the component simulation readme for details regarding the component finite element models and their output. The standalone code used to simulate the uniaxial response of the material coupons and optimize the constitutive model parameters is not included as part of this dataset. Details regarding the constitutive models and their parameter optimization procedure are beyond the scope of this dataset, and can be found in
Wilson, L., and Morrison, M. (2024). A Critical Evaluation of Some Constitutive Models for Finite-Element Simulation of Structural Steel Components. Journal of Engineering Mechanics, 150(1), 04023107.

The abbreviated Fortran code contains the Abaqus user material definition subroutine, UMAT, for the fifth and novel model. Its logic is thoroughly commented on, and descriptions for its notation are found in the adjacent notation file.