Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression

Polymeric materials are now major materials used in various situations. However, most polymers are usually unsuitable for use in high temperature environments because of low glass transition temperature. In polymers, however, polyimide is one of polymers having relatively higher glass transition tem...

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Autores principales:	Akifumi YOSHIMOTO, Hidetoshi KOBAYASHI, Keitaro HORIKAWA, Kenichi TANIGAKI
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2016
Materias:	polyimide foam strain rate ambient temperature impact anisotropy Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/2a089f2a76d2480bbaae9aa998f3878e
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spelling	oai:doaj.org-article:2a089f2a76d2480bbaae9aa998f3878e2021-11-26T06:55:30ZEffects of strain-rate and temperature on mechanical behavior of polyimide foam in compression2187-974510.1299/mej.16-00025https://doaj.org/article/2a089f2a76d2480bbaae9aa998f3878e2016-09-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/3/5/3_16-00025/_pdf/-char/enhttps://doaj.org/toc/2187-9745Polymeric materials are now major materials used in various situations. However, most polymers are usually unsuitable for use in high temperature environments because of low glass transition temperature. In polymers, however, polyimide is one of polymers having relatively higher glass transition temperature and high strength. This means that the mechanical property of polyimide has been said not to be changed very much by temperature. Therefore, polyimide foam is expected to show good mechanical performance over wide temperature range. In order to increase the use of a polyimide foam in industrial applications, it is necessary to know its deformation behavior in wide range of strain rates and temperature. In this study, a series of compression tests at various strain rates, from 10-3 to 103 s-1 were carried out in order to examine the effect of strain rate on the compressive properties of polyimide foam. It was found that the flow stress of polyimide foam increased dramatically at dynamic strain rates. The effect of ambient temperature on the properties of polyimide foam was also investigated at temperature from -190 °C to 270 °C. The flow stress decreased with increasing temperature in the range from room temperature to 270 °C. At -190 °C, the deformation behavior of polyimide foam changed to be brittle.Akifumi YOSHIMOTOHidetoshi KOBAYASHIKeitaro HORIKAWAKenichi TANIGAKIThe Japan Society of Mechanical Engineersarticlepolyimide foamstrain rateambient temperatureimpactanisotropyMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 3, Iss 5, Pp 16-00025-16-00025 (2016)
institution	DOAJ
collection	DOAJ
language	EN
topic	polyimide foam strain rate ambient temperature impact anisotropy Mechanical engineering and machinery TJ1-1570
spellingShingle	polyimide foam strain rate ambient temperature impact anisotropy Mechanical engineering and machinery TJ1-1570 Akifumi YOSHIMOTO Hidetoshi KOBAYASHI Keitaro HORIKAWA Kenichi TANIGAKI Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
description	Polymeric materials are now major materials used in various situations. However, most polymers are usually unsuitable for use in high temperature environments because of low glass transition temperature. In polymers, however, polyimide is one of polymers having relatively higher glass transition temperature and high strength. This means that the mechanical property of polyimide has been said not to be changed very much by temperature. Therefore, polyimide foam is expected to show good mechanical performance over wide temperature range. In order to increase the use of a polyimide foam in industrial applications, it is necessary to know its deformation behavior in wide range of strain rates and temperature. In this study, a series of compression tests at various strain rates, from 10-3 to 103 s-1 were carried out in order to examine the effect of strain rate on the compressive properties of polyimide foam. It was found that the flow stress of polyimide foam increased dramatically at dynamic strain rates. The effect of ambient temperature on the properties of polyimide foam was also investigated at temperature from -190 °C to 270 °C. The flow stress decreased with increasing temperature in the range from room temperature to 270 °C. At -190 °C, the deformation behavior of polyimide foam changed to be brittle.
format	article
author	Akifumi YOSHIMOTO Hidetoshi KOBAYASHI Keitaro HORIKAWA Kenichi TANIGAKI
author_facet	Akifumi YOSHIMOTO Hidetoshi KOBAYASHI Keitaro HORIKAWA Kenichi TANIGAKI
author_sort	Akifumi YOSHIMOTO
title	Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
title_short	Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
title_full	Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
title_fullStr	Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
title_full_unstemmed	Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
title_sort	effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression
publisher	The Japan Society of Mechanical Engineers
publishDate	2016
url	https://doaj.org/article/2a089f2a76d2480bbaae9aa998f3878e
work_keys_str_mv	AT akifumiyoshimoto effectsofstrainrateandtemperatureonmechanicalbehaviorofpolyimidefoamincompression AT hidetoshikobayashi effectsofstrainrateandtemperatureonmechanicalbehaviorofpolyimidefoamincompression AT keitarohorikawa effectsofstrainrateandtemperatureonmechanicalbehaviorofpolyimidefoamincompression AT kenichitanigaki effectsofstrainrateandtemperatureonmechanicalbehaviorofpolyimidefoamincompression
_version_	1718409707785289728

Effects of strain-rate and temperature on mechanical behavior of polyimide foam in compression

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