Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure

The internal pressure of a thin-walled cylindrical structure under axial compression may improve the buckling stability by relieving loads and reducing initial imperfections. In this study, the effect of internal pressure on the buckling knockdown factor is investigated for axially compressed thin-w...

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Autores principales:	Do-Young Kim, Chang-Hoon Sim, Jae-Sang Park, Joon-Tae Yoo, Young-Ha Yoon, Keejoo Lee
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	thin-walled composite cylinder knockdown factor (KDF) internal pressure shell thickness ratio slenderness ratio post-buckling analysis Motor vehicles. Aeronautics. Astronautics TL1-4050
Acceso en línea:	https://doaj.org/article/d5496758c65349229acf1cba7c47778f
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spelling	oai:doaj.org-article:d5496758c65349229acf1cba7c47778f2021-11-25T15:57:46ZBuckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure10.3390/aerospace81103462226-4310https://doaj.org/article/d5496758c65349229acf1cba7c47778f2021-11-01T00:00:00Zhttps://www.mdpi.com/2226-4310/8/11/346https://doaj.org/toc/2226-4310The internal pressure of a thin-walled cylindrical structure under axial compression may improve the buckling stability by relieving loads and reducing initial imperfections. In this study, the effect of internal pressure on the buckling knockdown factor is investigated for axially compressed thin-walled composite cylinders with different shell thickness ratios and slenderness ratios. Various shell thickness ratios and slenderness ratios are considered when the buckling knockdown factor is derived for the thin-walled composite cylinders under both axial compression and internal pressure. Nonlinear post-buckling analyses are conducted using the nonlinear finite element analysis program, ABAQUS. The single perturbation load approach is used to represent the geometric initial imperfection of thin-walled composite cylinders. For cases with the axial compressive force only, the buckling knockdown factor decreases as the shell thickness ratio increases or as the slenderness ratio increases. When the internal pressure is considered simultaneously with the axial compressive force, the buckling knockdown factor decreases as the slenderness ratio increases but increases as the shell thickness ratio increases. The buckling knockdown factors considering the internal pressure and axial compressions are higher by 2.67% to 38.98% compared with the knockdown factors considering the axial compressive force only. The results show the significant effect of the internal pressure, particularly for thinner composite cylinders, and that the buckling knockdown factors may be enhanced for all the shell thickness ratios and slenderness ratios considered in this study when the internal pressure is applied to the cylinder.Do-Young KimChang-Hoon SimJae-Sang ParkJoon-Tae YooYoung-Ha YoonKeejoo LeeMDPI AGarticlethin-walled composite cylinderknockdown factor (KDF)internal pressureshell thickness ratioslenderness ratiopost-buckling analysisMotor vehicles. Aeronautics. AstronauticsTL1-4050ENAerospace, Vol 8, Iss 346, p 346 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thin-walled composite cylinder knockdown factor (KDF) internal pressure shell thickness ratio slenderness ratio post-buckling analysis Motor vehicles. Aeronautics. Astronautics TL1-4050
spellingShingle	thin-walled composite cylinder knockdown factor (KDF) internal pressure shell thickness ratio slenderness ratio post-buckling analysis Motor vehicles. Aeronautics. Astronautics TL1-4050 Do-Young Kim Chang-Hoon Sim Jae-Sang Park Joon-Tae Yoo Young-Ha Yoon Keejoo Lee Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure
description	The internal pressure of a thin-walled cylindrical structure under axial compression may improve the buckling stability by relieving loads and reducing initial imperfections. In this study, the effect of internal pressure on the buckling knockdown factor is investigated for axially compressed thin-walled composite cylinders with different shell thickness ratios and slenderness ratios. Various shell thickness ratios and slenderness ratios are considered when the buckling knockdown factor is derived for the thin-walled composite cylinders under both axial compression and internal pressure. Nonlinear post-buckling analyses are conducted using the nonlinear finite element analysis program, ABAQUS. The single perturbation load approach is used to represent the geometric initial imperfection of thin-walled composite cylinders. For cases with the axial compressive force only, the buckling knockdown factor decreases as the shell thickness ratio increases or as the slenderness ratio increases. When the internal pressure is considered simultaneously with the axial compressive force, the buckling knockdown factor decreases as the slenderness ratio increases but increases as the shell thickness ratio increases. The buckling knockdown factors considering the internal pressure and axial compressions are higher by 2.67% to 38.98% compared with the knockdown factors considering the axial compressive force only. The results show the significant effect of the internal pressure, particularly for thinner composite cylinders, and that the buckling knockdown factors may be enhanced for all the shell thickness ratios and slenderness ratios considered in this study when the internal pressure is applied to the cylinder.
format	article
author	Do-Young Kim Chang-Hoon Sim Jae-Sang Park Joon-Tae Yoo Young-Ha Yoon Keejoo Lee
author_facet	Do-Young Kim Chang-Hoon Sim Jae-Sang Park Joon-Tae Yoo Young-Ha Yoon Keejoo Lee
author_sort	Do-Young Kim
title	Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure
title_short	Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure
title_full	Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure
title_fullStr	Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure
title_full_unstemmed	Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure
title_sort	buckling knockdown factors of composite cylinders under both compression and internal pressure
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d5496758c65349229acf1cba7c47778f
work_keys_str_mv	AT doyoungkim bucklingknockdownfactorsofcompositecylindersunderbothcompressionandinternalpressure AT changhoonsim bucklingknockdownfactorsofcompositecylindersunderbothcompressionandinternalpressure AT jaesangpark bucklingknockdownfactorsofcompositecylindersunderbothcompressionandinternalpressure AT joontaeyoo bucklingknockdownfactorsofcompositecylindersunderbothcompressionandinternalpressure AT younghayoon bucklingknockdownfactorsofcompositecylindersunderbothcompressionandinternalpressure AT keejoolee bucklingknockdownfactorsofcompositecylindersunderbothcompressionandinternalpressure
_version_	1718413408617889792

Buckling Knockdown Factors of Composite Cylinders under Both Compression and Internal Pressure

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