Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation

This study examines numerically the uniaxial stability of triaxial weave fabric (TWF) composites employing finite element (FE) model with homogenized constitutive relation. TWF, which presents high specific-strength and stiffness due to its porous and lightweight properties, was previously modelled...

Full description

Saved in:

Bibliographic Details
Main Author:	Rasin, Norhidayah
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TA Engineering (General) Civil engineering (General)
Online Access:	http://eprints.utm.my/id/eprint/41724/5/NorhidayahRasinMFKA2013.pdf
Tags:	Add Tag No Tags, Be the first to tag this record!

id	my-utm-ep.41724
record_format	uketd_dc
spelling	my-utm-ep.417242020-06-29T01:00:10Z Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation 2013-07 Rasin, Norhidayah TA Engineering (General). Civil engineering (General) This study examines numerically the uniaxial stability of triaxial weave fabric (TWF) composites employing finite element (FE) model with homogenized constitutive relation. TWF, which presents high specific-strength and stiffness due to its porous and lightweight properties, was previously modelled using solid elements or plybased approach, and thus making computation considerably complex and timeconsuming. To circumvent these issues, the current FE formulation is of geometrical nonlinearity employing Newton-Rhapson method where TWF unit cell is treated as a standalone non-conforming composite plate element making use of the homogenized ABD stiffness matrix, where Aij, Bij, and Dij indicate the extensional, coupling, and bending stiffness, respectively in which degree of freedom has been greatly reduced. By means of Matlab program, the currently formulated model has demonstrated good agreement with existing numerical and experimental results from literature in terms of elastic properties. For the buckling analysis, four types of boundary conditions are explored: fully simply supported, fully-clamped, free-simply supported and freeclamped. High dependencies of post-buckling patterns of compression load against both maximum and minimum deflections on numerous aspect ratios from 0.25 to 5 are observed in TWF, from which a characteristic equation has been defined for practical convenience before the occurrence of post-buckling. Such equation is described on the basis of the critical buckling load, Nmax, and stiffness factor, S, the best characterization of which is expressed in a logarithmic manner. The study has recognized that the buckling characteristics correlate directly to TWF’s aspect ratios and level of rigidity imposed through the boundary conditions. 2013-07 Thesis http://eprints.utm.my/id/eprint/41724/ http://eprints.utm.my/id/eprint/41724/5/NorhidayahRasinMFKA2013.pdf application/pdf en public masters Universiti Teknologi Malaysia, Faculty of Civil Engineering Faculty of Civil Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TA Engineering (General) Civil engineering (General)
spellingShingle	TA Engineering (General) Civil engineering (General) Rasin, Norhidayah Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
description	This study examines numerically the uniaxial stability of triaxial weave fabric (TWF) composites employing finite element (FE) model with homogenized constitutive relation. TWF, which presents high specific-strength and stiffness due to its porous and lightweight properties, was previously modelled using solid elements or plybased approach, and thus making computation considerably complex and timeconsuming. To circumvent these issues, the current FE formulation is of geometrical nonlinearity employing Newton-Rhapson method where TWF unit cell is treated as a standalone non-conforming composite plate element making use of the homogenized ABD stiffness matrix, where Aij, Bij, and Dij indicate the extensional, coupling, and bending stiffness, respectively in which degree of freedom has been greatly reduced. By means of Matlab program, the currently formulated model has demonstrated good agreement with existing numerical and experimental results from literature in terms of elastic properties. For the buckling analysis, four types of boundary conditions are explored: fully simply supported, fully-clamped, free-simply supported and freeclamped. High dependencies of post-buckling patterns of compression load against both maximum and minimum deflections on numerous aspect ratios from 0.25 to 5 are observed in TWF, from which a characteristic equation has been defined for practical convenience before the occurrence of post-buckling. Such equation is described on the basis of the critical buckling load, Nmax, and stiffness factor, S, the best characterization of which is expressed in a logarithmic manner. The study has recognized that the buckling characteristics correlate directly to TWF’s aspect ratios and level of rigidity imposed through the boundary conditions.
format	Thesis
qualification_level	Master's degree
author	Rasin, Norhidayah
author_facet	Rasin, Norhidayah
author_sort	Rasin, Norhidayah
title	Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
title_short	Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
title_full	Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
title_fullStr	Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
title_full_unstemmed	Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
title_sort	stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation
granting_institution	Universiti Teknologi Malaysia, Faculty of Civil Engineering
granting_department	Faculty of Civil Engineering
publishDate	2013
url	http://eprints.utm.my/id/eprint/41724/5/NorhidayahRasinMFKA2013.pdf
_version_	1747816605076684800

Stability of triaxial weave fabric composites employing finite element model with homogenized constitutive relation

Similar Items