An accurate modelling of the material behavior is important in the design and analysis of a structure. The combined isotropic and kinematic hardening material model proposed by Chaboche has been one of the models that is widely used in the numerical modelling to simulate the response of steel under cyclic loading. A combined experimental and numerical study has been carried to develop a procedure to systematically calculate the parameters for the model that can predict the material response under both monotonic and cyclic loading. Nineteen straight and notched round specimens of ASTM A572 Grade 50 steel were tested under monotonie and cyclic loading until fracture. The cyclic tests were carried out at various strain ranges. A systematic procedure that enables the calculation of the parameters for the material model that are equally applicable for monotonie and cyclic loading has been developed and are presented. Numerical simulations with these parameters have been found to be in good agreement with the measured stress-strain curves of the round specimen tests. Good agreement has also been found between the test and predicted instance of fracture of the specimen using a variation of the continuum damage mechanics fracture criteria by Lemaitre.

Additional Metadata
Conference Annual Conference of the Canadian Society for Civil Engineering 2013: Know-How - Savoir-Faire, CSCE 2013
Citation
Wen, Z., & Khoo, H. A. (2013). Modelling of steel behaviour for monotonic and cyclic loading. Presented at the Annual Conference of the Canadian Society for Civil Engineering 2013: Know-How - Savoir-Faire, CSCE 2013.