Effect of Aspect Ratio and Boundary Conditions in Modeling Shape Memory Alloy Nanostructures with 3D Coupled Dynamic Phase-Field Theories
Joint Authors
Zu, J. W.
Dhote, R.
Gomez, H.
Melnik, Roderick
Source
Mathematical Problems in Engineering
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-12-28
Country of Publication
Egypt
No. of Pages
19
Main Subjects
Abstract EN
The behavior of shape memory alloy (SMA) nanostructures is influenced by strain rate and temperature evolution during dynamic loading.
The coupling between temperature, strain, and strain rate is essential to capture inherent thermomechanical behavior in SMAs.
In this paper, we propose a new 3D phase-field model that accounts for two-way coupling between mechanical and thermal physics.
We use the strain-based Ginzburg-Landau potential for cubic-to-tetragonal phase transformations.
The variational formulation of the developed model is implemented in the isogeometric analysis framework to overcome numerical challenges.
We have observed a complete disappearance of the out-of-plane martensitic variant in a very high aspect ratio SMA domain as well as the presence of three variants in equal portions in a low aspect ratio SMA domain.
The dependence of different boundary conditions on the microstructure morphology has been examined energetically.
The tensile tests on rectangular prism nanowires, using the displacement based loading, demonstrate the shape memory effect and pseudoelastic behavior.
We have also observed that higher strain rates, as well as the lower aspect ratio domains, resulting in high yield stress and phase transformations occur at higher stress during dynamic axial loading.
American Psychological Association (APA)
Dhote, R.& Gomez, H.& Melnik, Roderick& Zu, J. W.. 2016. Effect of Aspect Ratio and Boundary Conditions in Modeling Shape Memory Alloy Nanostructures with 3D Coupled Dynamic Phase-Field Theories. Mathematical Problems in Engineering،Vol. 2016, no. 2016, pp.1-19.
https://search.emarefa.net/detail/BIM-1112057
Modern Language Association (MLA)
Dhote, R.…[et al.]. Effect of Aspect Ratio and Boundary Conditions in Modeling Shape Memory Alloy Nanostructures with 3D Coupled Dynamic Phase-Field Theories. Mathematical Problems in Engineering No. 2016 (2016), pp.1-19.
https://search.emarefa.net/detail/BIM-1112057
American Medical Association (AMA)
Dhote, R.& Gomez, H.& Melnik, Roderick& Zu, J. W.. Effect of Aspect Ratio and Boundary Conditions in Modeling Shape Memory Alloy Nanostructures with 3D Coupled Dynamic Phase-Field Theories. Mathematical Problems in Engineering. 2016. Vol. 2016, no. 2016, pp.1-19.
https://search.emarefa.net/detail/BIM-1112057
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1112057