Elastic-plastic stress investigation on crack branching in fibre-reinforced composites

The increasing demand for fiber reinforced composites (FRCs) in many manufacturing industries has propelled the need to refine and improve existing knowledge on the properties of these materials. Valued for their high strength and versatility, existing defects on FRCs may eventually cause catastroph...

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Main Author: Hussain, Naveeda
Other Authors: Xiao Zhongmin
Format: Final Year Project
Language:English
Published: 2017
Subjects:
Online Access:http://hdl.handle.net/10356/71452
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-714522023-03-04T18:15:26Z Elastic-plastic stress investigation on crack branching in fibre-reinforced composites Hussain, Naveeda Xiao Zhongmin School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering The increasing demand for fiber reinforced composites (FRCs) in many manufacturing industries has propelled the need to refine and improve existing knowledge on the properties of these materials. Valued for their high strength and versatility, existing defects on FRCs may eventually cause catastrophic mechanical failures. Thus, a thorough understanding and review of the principles behind failure in FRCs is crucial. This project employed finite element analysis software ABAQUS 6.16 to simulate the interaction between an existing crack and circular inclusion on an infinite matrix under mode-I opening displacement. The elastic-plastic stress analysis was based on failure characteristics such as Stress Intensity Factors and Crack Tip Opening Displacements. Analysis showed that crack propagation is greatly affected by matrix-inclusion elastic modulus strength with a softer inclusion experiencing the greatest stresses. The effect of varying inclusion diameter, crack-inclusion distance and crack orientation was also investigated in relation to the tendency for crack to propagate at various dimensions. It was later found crack tips that were closer to a large inclusion or branched at the smaller angle tended to have greater stresses under elastic condition or CTOD under plastic condition. Keywords: Crack displacement mode; Stress Intensity Factor; J-Integral; Crack Tip Opening Displacement. Bachelor of Engineering (Mechanical Engineering) 2017-05-16T10:11:13Z 2017-05-16T10:11:13Z 2017 Final Year Project (FYP) http://hdl.handle.net/10356/71452 en Nanyang Technological University 82 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering
spellingShingle DRNTU::Engineering::Mechanical engineering
Hussain, Naveeda
Elastic-plastic stress investigation on crack branching in fibre-reinforced composites
description The increasing demand for fiber reinforced composites (FRCs) in many manufacturing industries has propelled the need to refine and improve existing knowledge on the properties of these materials. Valued for their high strength and versatility, existing defects on FRCs may eventually cause catastrophic mechanical failures. Thus, a thorough understanding and review of the principles behind failure in FRCs is crucial. This project employed finite element analysis software ABAQUS 6.16 to simulate the interaction between an existing crack and circular inclusion on an infinite matrix under mode-I opening displacement. The elastic-plastic stress analysis was based on failure characteristics such as Stress Intensity Factors and Crack Tip Opening Displacements. Analysis showed that crack propagation is greatly affected by matrix-inclusion elastic modulus strength with a softer inclusion experiencing the greatest stresses. The effect of varying inclusion diameter, crack-inclusion distance and crack orientation was also investigated in relation to the tendency for crack to propagate at various dimensions. It was later found crack tips that were closer to a large inclusion or branched at the smaller angle tended to have greater stresses under elastic condition or CTOD under plastic condition. Keywords: Crack displacement mode; Stress Intensity Factor; J-Integral; Crack Tip Opening Displacement.
author2 Xiao Zhongmin
author_facet Xiao Zhongmin
Hussain, Naveeda
format Final Year Project
author Hussain, Naveeda
author_sort Hussain, Naveeda
title Elastic-plastic stress investigation on crack branching in fibre-reinforced composites
title_short Elastic-plastic stress investigation on crack branching in fibre-reinforced composites
title_full Elastic-plastic stress investigation on crack branching in fibre-reinforced composites
title_fullStr Elastic-plastic stress investigation on crack branching in fibre-reinforced composites
title_full_unstemmed Elastic-plastic stress investigation on crack branching in fibre-reinforced composites
title_sort elastic-plastic stress investigation on crack branching in fibre-reinforced composites
publishDate 2017
url http://hdl.handle.net/10356/71452
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