Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells

This paper presents a finite element method to investigate the hygrothermal effects on the free vibration characteristics of delaminated carbon-epoxy composite pretwisted rotating conical shells. The generalized dynamic equilibrium equation is derived from Lagrange's equation of motion negl...

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Autores principales:	Tanmoy BANDYOPADHYAY, Amit KARMAKAR, Kikuo KISHIMOTO
Formato:	article
Lenguaje:	EN
Publicado:	The Japan Society of Mechanical Engineers 2014
Materias:	conical shell hygrothermal finite element delamination composite laminate multi-point constraint Mechanical engineering and machinery TJ1-1570
Acceso en línea:	https://doaj.org/article/617a48c72f71444285939f5b6acb7f93
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spelling	oai:doaj.org-article:617a48c72f71444285939f5b6acb7f932021-11-26T06:14:30ZHygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells2187-974510.1299/mej.2014smm0059https://doaj.org/article/617a48c72f71444285939f5b6acb7f932014-12-01T00:00:00Zhttps://www.jstage.jst.go.jp/article/mej/1/6/1_2014smm0059/_pdf/-char/enhttps://doaj.org/toc/2187-9745This paper presents a finite element method to investigate the hygrothermal effects on the free vibration characteristics of delaminated carbon-epoxy composite pretwisted rotating conical shells. The generalized dynamic equilibrium equation is derived from Lagrange's equation of motion neglecting Coriolis effect for moderate rotational speed. In the present formulation, an eight-noded isoparametric plate bending element is used based on the Mindlin's theory. The multi-point constraint algorithm has been incorporated to ensure the compatibility of deformation and equilibrium of resultant forces and moments at the delamination crack front. Numerical results have been generated to study the combined effects of temperature and moisture concentration on the natural frequencies of delaminated composite conical shells in respect of twist angle, stacking sequence, rotational speed and location of delamination. The mode shapes for a typical laminate configuration in hygrothermal environment is also presented.Tanmoy BANDYOPADHYAYAmit KARMAKARKikuo KISHIMOTOThe Japan Society of Mechanical Engineersarticleconical shellhygrothermalfinite elementdelaminationcompositelaminatemulti-point constraintMechanical engineering and machineryTJ1-1570ENMechanical Engineering Journal, Vol 1, Iss 6, Pp SMM0059-SMM0059 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	conical shell hygrothermal finite element delamination composite laminate multi-point constraint Mechanical engineering and machinery TJ1-1570
spellingShingle	conical shell hygrothermal finite element delamination composite laminate multi-point constraint Mechanical engineering and machinery TJ1-1570 Tanmoy BANDYOPADHYAY Amit KARMAKAR Kikuo KISHIMOTO Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
description	This paper presents a finite element method to investigate the hygrothermal effects on the free vibration characteristics of delaminated carbon-epoxy composite pretwisted rotating conical shells. The generalized dynamic equilibrium equation is derived from Lagrange's equation of motion neglecting Coriolis effect for moderate rotational speed. In the present formulation, an eight-noded isoparametric plate bending element is used based on the Mindlin's theory. The multi-point constraint algorithm has been incorporated to ensure the compatibility of deformation and equilibrium of resultant forces and moments at the delamination crack front. Numerical results have been generated to study the combined effects of temperature and moisture concentration on the natural frequencies of delaminated composite conical shells in respect of twist angle, stacking sequence, rotational speed and location of delamination. The mode shapes for a typical laminate configuration in hygrothermal environment is also presented.
format	article
author	Tanmoy BANDYOPADHYAY Amit KARMAKAR Kikuo KISHIMOTO
author_facet	Tanmoy BANDYOPADHYAY Amit KARMAKAR Kikuo KISHIMOTO
author_sort	Tanmoy BANDYOPADHYAY
title	Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
title_short	Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
title_full	Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
title_fullStr	Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
title_full_unstemmed	Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
title_sort	hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells
publisher	The Japan Society of Mechanical Engineers
publishDate	2014
url	https://doaj.org/article/617a48c72f71444285939f5b6acb7f93
work_keys_str_mv	AT tanmoybandyopadhyay hygrothermaleffectsonthefreevibrationcharacteristicsofdelaminatedcompositepretwistedrotatingconicalshells AT amitkarmakar hygrothermaleffectsonthefreevibrationcharacteristicsofdelaminatedcompositepretwistedrotatingconicalshells AT kikuokishimoto hygrothermaleffectsonthefreevibrationcharacteristicsofdelaminatedcompositepretwistedrotatingconicalshells
_version_	1718409780048953344

Hygrothermal effects on the free vibration characteristics of delaminated composite pretwisted rotating conical shells

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