Phase transition induced interfacial debonding in shape memory alloy fiber–matrix system

This paper investigates the phase transition induced interfacial debonding of an embedded superelastic NiTi shape memory alloy (SMA) fiber in an epoxy matrix. In situ interfacial debonding morphology and the stress–strain responses of the fiber are obtained for different fiber diameter and surface r...

Full description

Saved in:
Bibliographic Details
Published in:International journal of solids and structures 2015-12, Vol.75-76, p.199-210
Main Authors: Chi, Yin, Li, Mingpeng, Xu, Lihua, Sun, Qingping
Format: Article
Language:English
Subjects:
Crack surface energy
Elastic matrix
Interfacial debonding
Necking front of martensite domain
Phase transition
Superelastic shape memory alloy fiber
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper investigates the phase transition induced interfacial debonding of an embedded superelastic NiTi shape memory alloy (SMA) fiber in an epoxy matrix. In situ interfacial debonding morphology and the stress–strain responses of the fiber are obtained for different fiber diameter and surface roughness. It is shown that, depending on these fiber parameters, a ductile or a brittle debonding can occur. The ductile debonding is caused by the phase transition of the fiber and took place together with the propagating necking front of the martensite domain. Compared with the tension of a free-standing fiber, the fiber–matrix bonding can lead to an increase in the front propagating force (plateau) of the fiber. By using Griffith’s energy balance approach, the crack surface energy is derived and the predictions of crack driving force agree well with the experimental data.
ISSN:0020-7683
1879-2146
DOI:10.1016/j.ijsolstr.2015.08.013