Enhanced two-dimensional superelasticity in a laser micromachined auxetic NiTiNOL geometry

IF 7.6 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials & Design Pub Date : 2025-03-04 DOI:10.1016/j.matdes.2025.113793

Asheesh Lanba , Tymur Sabirov , Adrien Melanson , Kevin Voter , Benjamin Hall

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Abstract

The superelastic effect in nitinol allows it to accommodate and recover large amounts of deformation. Despite possessing this incredible ability, their use in applications remains limited due to the difficulty in machining into novel geometries. Laser-micromachining is an attractive solution to this problem, with the ability to micromachine geometries not conventionally possible. Such geometries, like auxetics, could be used to enhance the simultaneous two-dimensional accommodation and recovery of superelastic strain. We showcase an example of this enhancement in a laser-micromachined auxetic geometry that has minimal material removal. The recoverable strain in the auxetic geometry represents an enhancement of 86% increase over the bulk failure strain in the loading direction, and an absolute increase of 70% over the bulk failure strain in the transverse direction. Such geometries with enhanced two-dimensional functionality could serve as functional backbones on elastomeric composite testbeds with potential applications in soft robotics, stretch-triggered drug delivery, stretchable electronics, adaptive filters and controlled adhesion.

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来源期刊

Materials & Design Engineering-Mechanical Engineering

CiteScore

14.30

自引率

7.10%

发文量

1028

审稿时长

85 days

期刊介绍： Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.