Main content

Deformation Response and Formability Limit Diagram Estimates of Dual-Phase Steels

Show full item record

Title: Deformation Response and Formability Limit Diagram Estimates of Dual-Phase Steels
Author: Espinosa, Esteban
Department: School of Engineering
Program: Engineering
Advisor: Simha, Hari
Abstract: New Dual-Phase (DP) steel sheet with desirable mechanical properties are developed using trialand-error methods that are time-consuming and expensive. Using only micro-structural information, methods to predict stress-strain under tension, reverse yield under compression following tensile loading, and a lower-bound formability limit diagram (FLD) are developed. Mean-field models were used to obtain the flow behavior of the composite under uni-axial loading and reverse yielding, and also serve as descriptors of stress-strain behavior of the ferrite and martensite phases in the finite element models. Representative Volume Elements (RVEs) of the steel were used for the creation of a morphologically realistic Finite Element Model, which in turn allows prediction of flow behavior under uni-axial and plane strain loading. The latter allows estimation of the FLD using the Marciniak-Kuczynski (M-K) and Modified Maximum Force Criterion (MMFC) approaches. Computations with the RVE models afford insights into the relationship between the microstructure and mechanical properties.
URI: https://hdl.handle.net/10214/25657
Date: 2021-04-28
Rights: Attribution-NoDerivatives 4.0 International


Files in this item

Files Size Format View
Espinosa_Esteban_202104_MSc.pdf 12.48Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record

Attribution-NoDerivatives 4.0 International Except where otherwise noted, this item's license is described as Attribution-NoDerivatives 4.0 International
The library is committed to ensuring that members of our user community with disabilities have equal access to our services and resources and that their dignity and independence is always respected. If you encounter a barrier and/or need an alternate format, please fill out our Library Print and Multimedia Alternate-Format Request Form. Contact us if you’d like to provide feedback: lib.a11y@uoguelph.ca  (email address)