Title
An Efficient Method For The Optimization Of Viscoplastic Constitutive Model Constants
Abstract
Constitutive modeling has proven useful in providing accurate predictions of material response in components subjected to a variety of operating conditions; however, the high number of experiments necessary to determine appropriate constants for a model can be prohibitive, especially for more expensive materials. Generally, up to twenty experiments simulating a range of conditions are needed to identify the material parameters for a model. In this paper, an automated process for optimizing the material constants of the Miller constitutive model for uniaxial modeling is introduced. The use of more complex stress, strain, and temperature histories than are traditionally used allows for the effects of all material parameters to be captured using significantly fewer tests. A graphical user interface known as uSHARP was created to implement the resulting method, which determines the material constants of a viscoplastic model using a minimum amount of experimental data. By carrying out successive finite element simulations and comparing the results to simulated experimental test data, both with and without ran- dom noise, the material constants were determined from 75% fewer experiments. The optimization method introduced here reduces the cost and time necessary to determine constitutive model constants through experimentation. Thus it allows for a more widespread application of advanced constitutive models in industry and for better life prediction modeling of critical components in high-temperature applications. Keywords: constitutive modeling, optimization, viscoplastic. Copyright © 2010 by ASME.
Publication Date
12-1-2010
Publication Title
Proceedings of the ASME Turbo Expo
Volume
6
Issue
PARTS A AND B
Number of Pages
569-580
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.1115/GT2010-23311
Copyright Status
Unknown
Socpus ID
82055189901 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/82055189901
STARS Citation
DeMarco, James P.; Hogan, Erik A.; Stewart, Calvin M.; and Gordon, Ali P., "An Efficient Method For The Optimization Of Viscoplastic Constitutive Model Constants" (2010). Scopus Export 2010-2014. 533.
https://stars.library.ucf.edu/scopus2010/533