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Design Method for Constant Force Components Based on Superelastic SMA

Clamping devices with constant force or pressure are desired in medical instruments, such as hemostatic forceps and the artificial sphincter, to prevent soft tissues from injures due to overloading. This paper studies the design method issues in constant force components using superelastic shape mem...

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Detalles Bibliográficos
Autores principales: Wang, Minghui, Yu, Hongliu, Shi, Ping, Meng, Qiaoling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6766029/
https://www.ncbi.nlm.nih.gov/pubmed/31487779
http://dx.doi.org/10.3390/ma12182842
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author Wang, Minghui
Yu, Hongliu
Shi, Ping
Meng, Qiaoling
author_facet Wang, Minghui
Yu, Hongliu
Shi, Ping
Meng, Qiaoling
author_sort Wang, Minghui
collection PubMed
description Clamping devices with constant force or pressure are desired in medical instruments, such as hemostatic forceps and the artificial sphincter, to prevent soft tissues from injures due to overloading. This paper studies the design method issues in constant force components using superelastic shape memory alloy. A generalized method for generating a constant force components-based shape memory alloy is proposed. An example of a C-shaped shape memory alloy sheet with a thickness of 0.2 mm is presented. The design results using the generalized design method for a C-shaped shape memory alloy sheet with 0.2 mm thickness are compared with its experimental results. Based on the generalized design method, the obtained design solutions for Cases 1 and 2 are coincident with the results obtained by the experiments. It could be seen that the generated design shape of the superelastic shape memory alloy component might obtain constant force within a relatively large deformation range. It is validated that the proposed generalized design method was feasible and effective. It is also illustrated that changing the geometric dimensions of the superelastic SMA component might obtain constant force within a relatively large deformation range.
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spelling pubmed-67660292019-09-30 Design Method for Constant Force Components Based on Superelastic SMA Wang, Minghui Yu, Hongliu Shi, Ping Meng, Qiaoling Materials (Basel) Article Clamping devices with constant force or pressure are desired in medical instruments, such as hemostatic forceps and the artificial sphincter, to prevent soft tissues from injures due to overloading. This paper studies the design method issues in constant force components using superelastic shape memory alloy. A generalized method for generating a constant force components-based shape memory alloy is proposed. An example of a C-shaped shape memory alloy sheet with a thickness of 0.2 mm is presented. The design results using the generalized design method for a C-shaped shape memory alloy sheet with 0.2 mm thickness are compared with its experimental results. Based on the generalized design method, the obtained design solutions for Cases 1 and 2 are coincident with the results obtained by the experiments. It could be seen that the generated design shape of the superelastic shape memory alloy component might obtain constant force within a relatively large deformation range. It is validated that the proposed generalized design method was feasible and effective. It is also illustrated that changing the geometric dimensions of the superelastic SMA component might obtain constant force within a relatively large deformation range. MDPI 2019-09-04 /pmc/articles/PMC6766029/ /pubmed/31487779 http://dx.doi.org/10.3390/ma12182842 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Minghui
Yu, Hongliu
Shi, Ping
Meng, Qiaoling
Design Method for Constant Force Components Based on Superelastic SMA
title Design Method for Constant Force Components Based on Superelastic SMA
title_full Design Method for Constant Force Components Based on Superelastic SMA
title_fullStr Design Method for Constant Force Components Based on Superelastic SMA
title_full_unstemmed Design Method for Constant Force Components Based on Superelastic SMA
title_short Design Method for Constant Force Components Based on Superelastic SMA
title_sort design method for constant force components based on superelastic sma
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6766029/
https://www.ncbi.nlm.nih.gov/pubmed/31487779
http://dx.doi.org/10.3390/ma12182842
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