HomeHome

Determining Material Parameters for Critical State Plasticity Models Based on Multilevel Extended Digital Database

Yang Liu; WaiChing Sun; Jacob Fish

Title:
Determining Material Parameters for Critical State Plasticity Models Based on Multilevel Extended Digital Database
Author(s):
Liu, Yang
Sun, WaiChing
Fish, Jacob
Date:
Type:
Articles
Department(s):
Civil Engineering and Engineering Mechanics
Volume:
83
Persistent URL:
Book/Journal Title:
Journal of Applied Mechanics
Abstract:
This work presents a new staggered multilevel material identification procedure for phenomenological critical state plasticity models. The emphasis is placed on cases in which available experimental data and constraints are insufficient for calibration. The key idea is to create a secondary virtual experimental database from high-fidelity models, such as discrete element simulations, then merge both the actual experimental data and secondary database as an extended digital database (EDD) to determine material parameters for the phenomenological macroscopic critical state plasticity model. The calibration procedure therefore consists of two steps. First, the material parameters of the discrete (distinct) element method (DEM) simulations are identified via the standard optimization procedure. Then, the calibrated DEM simulations are used to expand the experimental database with new simulated loading histories. This expansion of database provides additional constraints necessary for calibration of the phenomenological critical state plasticity models. The robustness of the proposed material identification framework is demonstrated in the context of the Dafalias–Manzari plasticity model.
Subject(s):
Materials--Computer simulation
Plasticity--Mathematical models
Mechanics, Applied
Materials--Mathematical models
Materials science
Mechanical engineering
Publisher DOI:
https://doi.org/10.1115/1.4031619
Item views
375
Metadata:
text | xml
Suggested Citation:
Yang Liu, WaiChing Sun, Jacob Fish, , Determining Material Parameters for Critical State Plasticity Models Based on Multilevel Extended Digital Database, Columbia University Academic Commons, .

Columbia University Libraries | Policies | FAQ