Crack analysis using extended finite element method with virtual crack closure technique

Dalam kajian ini, XFEM bersempena dengan VCCT diperkenalkan untuk mengira parameter SERR dan SIF. Dalam kombinasi tersebut, VCCT dinyatakan sebagai kriteria kegagalan untuk mengira SERR di hujung retakan. Selain itu, analisis tiada perambatan retakan dibentangkan di plat retakan pinggir dan plat ret...

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Main Author:	Wong, Ee Fun
Format:	Thesis
Language:	English
Published:	2016
Subjects:	TJ Mechanical engineering and machinery TJ1-1570 Mechanical engineering and machinery
Online Access:	http://eprints.usm.my/33114/1/Wong_Ee_Fun_CRACK_ANALYSIS_USING_EXTENDED_FINITE_ELEMENT_METHOD_WITH_VIRTUAL_CRACK_CLOSURE_TECHNIQU_2016_MSc_ME_BSB_24.pdf
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id	my-usm-ep.33114
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spelling	my-usm-ep.331142019-04-12T05:25:33Z Crack analysis using extended finite element method with virtual crack closure technique 2016 Wong, Ee Fun TJ Mechanical engineering and machinery TJ1-1570 Mechanical engineering and machinery Dalam kajian ini, XFEM bersempena dengan VCCT diperkenalkan untuk mengira parameter SERR dan SIF. Dalam kombinasi tersebut, VCCT dinyatakan sebagai kriteria kegagalan untuk mengira SERR di hujung retakan. Selain itu, analisis tiada perambatan retakan dibentangkan di plat retakan pinggir dan plat retakan condong. Sementara itu, analisis perambatan retakan ditunjukkan oleh rasuk dua julur (DCB). Keputusan simulasi dibandingkan dengan keputusan teori di mana ia sebagai rujukan. Dalam analisis penumpuan, analisis jejaring berstruktur menggunakan XFEM-VCCT telah terbukti secara stabil dalam analisis apabila retakan terletak di muka elemen dan juga di pinggir elemen. Dalam analisis retakan pinggir, purata perbezaan diperolehi oleh XFEM-VCCT adalah kira-kira 0.5% manakala ralat purata dikira dengan FEM konvensional adalah lebih daripada 1% berbanding dengan penyelesaian teori. In this study, XFEM in conjunction with VCCT was utilized to calculate the parameters of SERR and SIF. In the combination, the VCCT was specified as the fracture criterion to calculate the SERR at the crack tip. As case studies, non-crack propagation analysis was presented in edge-crack plate and inclined-crack plate. For crack propagation analysis, the double cantilever beam (DCB) problem was used as case study. The simulation results were compared to the theoretical results as the reference point. In the convergence analysis, the structured mesh analysis using XFEM-VCCT was proven to be stable for analysis when the crack lied on the face of element and also on the edge of element. In the edge-crack analysis, the average error obtained by XFEM-VCCT was approximately 0.5% whereas the average error computed by conventional FEM in conjunction with J-integral was more than 1% compared to theoretical results. Furthermore, in the different inclined-crack angle analysis, the average error produced by XFEM-VCCT was 1.06% and 1.45% for KI and KII, respectively. 2016 Thesis http://eprints.usm.my/33114/ http://eprints.usm.my/33114/1/Wong_Ee_Fun_CRACK_ANALYSIS_USING_EXTENDED_FINITE_ELEMENT_METHOD_WITH_VIRTUAL_CRACK_CLOSURE_TECHNIQU_2016_MSc_ME_BSB_24.pdf application/pdf en public masters Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Mekanikal
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TJ Mechanical engineering and machinery TJ1-1570 Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery TJ1-1570 Mechanical engineering and machinery Wong, Ee Fun Crack analysis using extended finite element method with virtual crack closure technique
description	Dalam kajian ini, XFEM bersempena dengan VCCT diperkenalkan untuk mengira parameter SERR dan SIF. Dalam kombinasi tersebut, VCCT dinyatakan sebagai kriteria kegagalan untuk mengira SERR di hujung retakan. Selain itu, analisis tiada perambatan retakan dibentangkan di plat retakan pinggir dan plat retakan condong. Sementara itu, analisis perambatan retakan ditunjukkan oleh rasuk dua julur (DCB). Keputusan simulasi dibandingkan dengan keputusan teori di mana ia sebagai rujukan. Dalam analisis penumpuan, analisis jejaring berstruktur menggunakan XFEM-VCCT telah terbukti secara stabil dalam analisis apabila retakan terletak di muka elemen dan juga di pinggir elemen. Dalam analisis retakan pinggir, purata perbezaan diperolehi oleh XFEM-VCCT adalah kira-kira 0.5% manakala ralat purata dikira dengan FEM konvensional adalah lebih daripada 1% berbanding dengan penyelesaian teori. In this study, XFEM in conjunction with VCCT was utilized to calculate the parameters of SERR and SIF. In the combination, the VCCT was specified as the fracture criterion to calculate the SERR at the crack tip. As case studies, non-crack propagation analysis was presented in edge-crack plate and inclined-crack plate. For crack propagation analysis, the double cantilever beam (DCB) problem was used as case study. The simulation results were compared to the theoretical results as the reference point. In the convergence analysis, the structured mesh analysis using XFEM-VCCT was proven to be stable for analysis when the crack lied on the face of element and also on the edge of element. In the edge-crack analysis, the average error obtained by XFEM-VCCT was approximately 0.5% whereas the average error computed by conventional FEM in conjunction with J-integral was more than 1% compared to theoretical results. Furthermore, in the different inclined-crack angle analysis, the average error produced by XFEM-VCCT was 1.06% and 1.45% for KI and KII, respectively.
format	Thesis
qualification_level	Master's degree
author	Wong, Ee Fun
author_facet	Wong, Ee Fun
author_sort	Wong, Ee Fun
title	Crack analysis using extended finite element method with virtual crack closure technique
title_short	Crack analysis using extended finite element method with virtual crack closure technique
title_full	Crack analysis using extended finite element method with virtual crack closure technique
title_fullStr	Crack analysis using extended finite element method with virtual crack closure technique
title_full_unstemmed	Crack analysis using extended finite element method with virtual crack closure technique
title_sort	crack analysis using extended finite element method with virtual crack closure technique
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Mekanikal
publishDate	2016
url	http://eprints.usm.my/33114/1/Wong_Ee_Fun_CRACK_ANALYSIS_USING_EXTENDED_FINITE_ELEMENT_METHOD_WITH_VIRTUAL_CRACK_CLOSURE_TECHNIQU_2016_MSc_ME_BSB_24.pdf
_version_	1747820578514927616

Crack analysis using extended finite element method with virtual crack closure technique

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