Computational Modeling of HSLA Steel for Tensile and Fatigue Tests Computational Mechanics Research Lab, Department of Mechanical Engineering, Ohio State University

Format:

Conference/Event

Author/Creator:

Xie, C. L., author.

Conference Name:

SAE 2003 World Congress & Exhibition (2003-03-03 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2003

Summary:

AbstractIn this work, a computational model of rate dependent crystal plasticity is developed to simulate the stress-strain response of HSLA-50 steel in constant strain-rate tensile and fatigue tests. The plasticity model is based on the thermally activated theory for plastic flow and incorporates kinematic hardening and grain-size dependent hardening. This constitutive model for polycrystalline metals is implemented in ABAQUS using the user interface UMAT. A Genetic Algorithm (GA) based optimization method is utilized to identify the crystal plasticity parameters from experimental data. The simulations help in understanding the mechanisms of slip system activity, local hardening and local strain on the material behavior as well as the effects of grain-size and kinematic hardening on plastic strain ratcheting, even in the macroscopically elastic regime. The model developed is a precursor to a physically motivated fatigue model including the explicit consideration of damage initiation and propagation

Notes:

Vendor supplied data

Publisher Number:

2003-01-0461

Access Restriction:

Restricted for use by site license