Experimental Study on the Behavior of Polyurethane Springs for Compression Members

In this study, the characteristics of the compression behavior of polyurethane springs that can be used as compression members of seismic devices, such as dampers and seismic isolators, were identified, and the effect of the design variables on the performance points of polyurethane springs was inve...

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Autores principales:	Young Hun Ju, Jong Wan Hu
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	polyurethane spring cyclic loading performance indicator compression member energy dissipation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/e0bbb1a1261c4c629734f4787f82899c
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spelling	oai:doaj.org-article:e0bbb1a1261c4c629734f4787f82899c2021-11-11T15:16:20ZExperimental Study on the Behavior of Polyurethane Springs for Compression Members10.3390/app1121102232076-3417https://doaj.org/article/e0bbb1a1261c4c629734f4787f82899c2021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/21/10223https://doaj.org/toc/2076-3417In this study, the characteristics of the compression behavior of polyurethane springs that can be used as compression members of seismic devices, such as dampers and seismic isolators, were identified, and the effect of the design variables on the performance points of polyurethane springs was investigated. Compressive stiffness and specimen size were set as the design variables of the polyurethane spring, and the performance indicators were set as maximum force, residual strain, and energy dissipation. A total of 40 specimens with different conditions were fabricated and a cyclic loading test was performed to obtain the force-displacement curve of the polyurethane spring and to check the performance indicator. Significant strength degradation was confirmed after the first cycle by repeated loading, and it was confirmed that compressive stiffness and size demonstrated a linear proportional relationship with maximum force. In addition, the design variables did not make a significant change to the recovered strain, including residual strain, and residual strain of about 1% to 3% occurred. Energy dissipation showed a tendency to decrease by about 60% with strength degradation after the first cycle, and this also demonstrated no relationship with the design variables. Finally, the relationship between the design variables and performance indicators set in this study was reviewed and suggestions are presented for developing a simple design formula for polyurethane springs.Young Hun JuJong Wan HuMDPI AGarticlepolyurethane springcyclic loadingperformance indicatorcompression memberenergy dissipationTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10223, p 10223 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyurethane spring cyclic loading performance indicator compression member energy dissipation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	polyurethane spring cyclic loading performance indicator compression member energy dissipation Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Young Hun Ju Jong Wan Hu Experimental Study on the Behavior of Polyurethane Springs for Compression Members
description	In this study, the characteristics of the compression behavior of polyurethane springs that can be used as compression members of seismic devices, such as dampers and seismic isolators, were identified, and the effect of the design variables on the performance points of polyurethane springs was investigated. Compressive stiffness and specimen size were set as the design variables of the polyurethane spring, and the performance indicators were set as maximum force, residual strain, and energy dissipation. A total of 40 specimens with different conditions were fabricated and a cyclic loading test was performed to obtain the force-displacement curve of the polyurethane spring and to check the performance indicator. Significant strength degradation was confirmed after the first cycle by repeated loading, and it was confirmed that compressive stiffness and size demonstrated a linear proportional relationship with maximum force. In addition, the design variables did not make a significant change to the recovered strain, including residual strain, and residual strain of about 1% to 3% occurred. Energy dissipation showed a tendency to decrease by about 60% with strength degradation after the first cycle, and this also demonstrated no relationship with the design variables. Finally, the relationship between the design variables and performance indicators set in this study was reviewed and suggestions are presented for developing a simple design formula for polyurethane springs.
format	article
author	Young Hun Ju Jong Wan Hu
author_facet	Young Hun Ju Jong Wan Hu
author_sort	Young Hun Ju
title	Experimental Study on the Behavior of Polyurethane Springs for Compression Members
title_short	Experimental Study on the Behavior of Polyurethane Springs for Compression Members
title_full	Experimental Study on the Behavior of Polyurethane Springs for Compression Members
title_fullStr	Experimental Study on the Behavior of Polyurethane Springs for Compression Members
title_full_unstemmed	Experimental Study on the Behavior of Polyurethane Springs for Compression Members
title_sort	experimental study on the behavior of polyurethane springs for compression members
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/e0bbb1a1261c4c629734f4787f82899c
work_keys_str_mv	AT younghunju experimentalstudyonthebehaviorofpolyurethanespringsforcompressionmembers AT jongwanhu experimentalstudyonthebehaviorofpolyurethanespringsforcompressionmembers
_version_	1718435785617702912

Experimental Study on the Behavior of Polyurethane Springs for Compression Members

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