Strength of superelastic NiTi velcro-like fasteners

0552621 - FZÚ 2022 RIV CH eng J - Journal Article
Vokoun, David - Pilch, Jan - Kadeřávek, Lukáš - Šittner, Petr
Strength of superelastic NiTi velcro-like fasteners.
Metals. Roč. 11, č. 6 (2021), č. článku 909. E-ISSN 2075-4701
R&D Projects: GA MŠMT(CZ) EF16_019/0000760
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760; AV ČR(CZ) MOST-20-11
Program: Bilaterální spolupráce
Institutional support: RVO:68378271
Keywords : Velcro-like fasteners * NiTi alloys * strength
OECD category: Applied mechanics
Impact factor: 2.695, year: 2021
Method of publishing: Open access

Velcro hook-and-loop fasteners invented more than 70 years ago are examples of the mechanism inspired by the tiny hooks found on the surface of burs of a plant commonly known as burdock. Several years ago, a novel Velcro-like fastener made of two arrays of hook-shaped thin NiTi wires was developed. Recently, it was noticed that the presented fastener design allowed for a prediction of the number of active hooks. In this continuing study, the tension strength of the fastener was simulated as a function of hook density. Based on statistics, the model showed non-linear dependency of the number of interlocked hooks on the hook density, for the simple hook pairs and the given hook geometry. The dependence of detachment force on stroke was simulated based on the Gaussian distribution of unhooking of individual hook connections along the stroke. The strength of the studied NiTi hook fasteners depended on hook density approximately linearly.
Permanent Link: http://hdl.handle.net/11104/0327770