Work

Enhanced interface adhesion in shape memory alloy hybrid composites via an elastomeric interface: An experimental and numerical investigation

Year: 2024

Type: article

Abstract: Shape Memory Alloy Hybrid Composites (SMAHCs) hold great promise for various applications. However, the interface between SMA and polymers presents challenges due to large strains associated with the martensitic transformations (MTs). Although different strategies have been proven effective in increasing interfacial strength, debonding and its prevention remain unresolved. Therefore, to enable MTs in SMAHCs, this paper proposes a novel solution using a rubber-like elastomeric interface. Pull-out SMAHC specimens were tested at different embedding lengths with and without the elastomeric interface. Specimens with the elastomeric interface showed better performance and stress-strain transfer during MT up to SMA wire breakage. The behaviour of the interface was studied using finite element analysis. A fine-tuning method was proposed for the cohesive zone model parameters. Simulated pull-out tests matched experimental data, revealing the debonding mechanisms. Results with the elastomer underscored the need to represent the underlying physics of a highly deformable interface fully.

Source: Composites Part B Engineering

DOI: 10.1016/j.compositesb.2024.111785

Authors: Gregorio Pisaneschi, Tommaso Maria Brugo, Paolo Cosseddu, Giulia Scalet, Andrea Zucchelli

Institutions: University of Bologna, University of Pavia

Language: English

Topic: Shape Memory Alloy Transformations

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $5,060

Funders: European Commission, Ministero dell’Istruzione, dell’Università e della Ricerca