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Yousef Payandeh

Yousef Payandeh

Academic rank: Assistant Professor
ORCID: https://orcid.org/0000-0001-5482-3991
Education: PhD.
ScopusId: 15731780700
Faculty: Engineering
Address: Arak University
Phone: 00988632625820

Research

Title
Effect of martensitic transformation in NiTi–epoxy smart composite on the composite overall behaviour
Type
Presentation
Keywords
martensitic transformation, NiTi–epoxy, composite
Year
2017
Researchers Yousef Payandeh

Abstract

For shape memory material components, a well-bonded interface will constrain the martensitic transformations and hence sacrifice the shape-memory effect and other performance. However, the stress cannot be transferred to the fiber if the interface is weak. Therefore, a compromise should be reached to achieve optimal overall performance of the composite system. Moreover, under the constraint of a matrix, the embedded SMA fibers will demonstrate a different transformation behavior to that in the free condition. In order to study the effect of phase transformation occurring in the wire on the composite overall behavior, a micromechanical model based on Piggott’s model has been developed. The mechanical behavior of the wire and matrix determined experimentally has been implemented in to the model. The results were compared with the experimental results and a good agreement has been found. The analytical and experimental results show a change in the trend of stress-strain curve which can be a sign of martensitic transformation. In other words, when the martensitic transformation takes place in the wires, the slope of the stress-strain curve for the composite specimens changes.