Prestressing effect of embedded Fe-based SMA wire on the flexural behavior of mortar beams

E Choi, A Ostadrahimi, WJ Kim, J Seo - Engineering Structures, 2021 - Elsevier
This paper investigates the stress recovery stress induced in the newly developed Fe-based
SMA and then studies the prestressing effect of embedded Fe-SMA wires on the flexural …

Enabling shape memory effect wires for acting like superelastic wires in terms of showing recentering capacity in mortar beams

E Choi, A Ostadrahimi, Y Lee, JS Jeon, I Kim - Construction and Building …, 2022 - Elsevier
Superelastic shape memory alloy (SMA) wires embedded in mortar beams show a
recentering capacity, however, shape memory effect wires can provide a prestressing effect …

Pullout resistance of crimped reinforcing fibers using cold-drawn NiTi SMA wires

E Choi, A Ostadrahimi, JH Lee - Construction and Building Materials, 2020 - Elsevier
This paper assesses the bond strength of crimped fibers manufactured by a cold-drawn SMA
wire using a continuous method. Several pullout tests are conducted to study bond strength …

Enhancement of compressive strength and strain ductility of SMA fiber reinforced concrete considering fiber's aspect ratios

E Choi, A Ostadrahimi, WJ Kim - Construction and Building Materials, 2022 - Elsevier
In this study, the effect of recovery stress on the toughness of cementitious materials was
investigated using randomly distributed SMA fibers in concrete. The composite was …

Analytical model of functionally graded material/shape memory alloy composite cantilever beam under bending

NV Viet, W Zaki, R Umer - Composite Structures, 2018 - Elsevier
A new analytical model for a functionally graded material (FGM)/shape memory alloy (SMA)
laminated composite cantilever beam subjected to a concentrated tip load is developed. The …

Effect of tension-compression asymmetry response on the bending of prismatic martensitic SMA beams: analytical and experimental study

A Ostadrahimi, F Taheri-Behrooz, E Choi - Materials, 2021 - mdpi.com
This paper aims to analytically derive bending equations, as well as semi-analytically predict
the deflection of prismatic SMA beams in the martensite phase. To this end, we are required …

On mechanical properties of NiTi SMA wires prestrained by cold rolling

E Choi, A Ostadrahimi, J Park - Smart Materials and Structures, 2020 - iopscience.iop.org
This study investigates mechanical properties and recovery stress of NiTi shape memory
alloy (SMA) wires prestrained by different degrees of cold rolling. Using differential scanning …

Mechanical response of single and double-helix SMA wire ropes

S Vahidi, J Arghavani, E Choi… - Mechanics of Advanced …, 2022 - Taylor & Francis
In this paper, based on three-dimensional phenomenological model and using a user-
defined material subroutine mechanical behavior of shape memory alloy (SMA) wire ropes …

A model for shape memory alloy beams accounting for tensile compressive asymmetry

NV Viet, W Zaki, Z Moumni - Journal of Intelligent Material …, 2019 - journals.sagepub.com
A new analytical model is derived for cantilever beams made from superelastic shape
memory alloy and subjected to tip load. The deformation of the beam is described based on …

Analytical solution for twinning deformation effect of pre-strained shape memory effect beam-columns

A Ostadrahimi… - Journal of Intelligent …, 2019 - journals.sagepub.com
In this article, an analytical solution is presented for twinning deformation effect of a prismatic
shape memory alloy beam-column. To this end, a reduced one-dimensional Souza model is …