Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model

A micromechanical model of ductile fracture is applied for API X65 steel to predict ductile failure of a full-scale API X65 pipes with simulated corrosion and defects under internal pressure. The micromechanical model is the Gurson model, incorporating void nucleation, growth and coalescence where t...

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Main Author:	Kim Sung, Chong
Format:	Undergraduates Project Papers
Language:	English
Published:	2013
Subjects:	TA Engineering (General). Civil engineering (General)
Online Access:	http://umpir.ump.edu.my/id/eprint/10625/ http://umpir.ump.edu.my/id/eprint/10625/ http://umpir.ump.edu.my/id/eprint/10625/1/FKM-DEGREE-CHONG%20KIM%20SUNG.pdf

id	ump-10625
recordtype	eprints
spelling	ump-106252015-10-07T07:05:48Z http://umpir.ump.edu.my/id/eprint/10625/ Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model Kim Sung, Chong TA Engineering (General). Civil engineering (General) A micromechanical model of ductile fracture is applied for API X65 steel to predict ductile failure of a full-scale API X65 pipes with simulated corrosion and defects under internal pressure. The micromechanical model is the Gurson model, incorporating void nucleation, growth and coalescence where the burst pressure is predicted based on the critical void volume fraction.The present study involves experimental comparison and numerical studies of the burst pressure of pipe under ductile fracture. The main objective of the present study is to determine the burst pressure of steel pipe using GursonTevaagard model. For the experimental, the results are from the previous research journal. For the finite element analysis, the pipe model is modeled as a 3 dimensional, quarter-model in MSC.PATRAN with MSC.MARC as nonlinear implicit solver. Results with proposed ductile fracture model indicates that predicted failure pressure attain maximum load for all cases, and are in good agreement with experimental data. It also showed that the burst pressure is decreasing for increasing defect depth and length. For the characters of void volume fraction, f, it can be seen that once the void reach void growth, it soon come to void coalescence, where the burst pressures are predicted at critical void and then fracture. The results from gouge defect varies in length is analyze based on the equivalent plastic strain, and the stress triaxially,  where void growth dependent on this two key quantities. Void volume fraction are examined based on the equivalent plastic strain and stress triaxiality on the normalize distance along the defect length and depth. It is found that distribution of equivalent plastic strain agreed well with the void volume fraction and the critical point occur at the defect tip along the defect depth and length. 2013-06 Undergraduates Project Papers NonPeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/10625/1/FKM-DEGREE-CHONG%20KIM%20SUNG.pdf Kim Sung, Chong (2013) Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model. Faculty of Mechanical Engineering, Universiti Malaysia Pahang. http://iportal.ump.edu.my/lib/item?id=chamo:79193&theme=UMP2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TA Engineering (General). Civil engineering (General)
spellingShingle	TA Engineering (General). Civil engineering (General) Kim Sung, Chong Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model
description	A micromechanical model of ductile fracture is applied for API X65 steel to predict ductile failure of a full-scale API X65 pipes with simulated corrosion and defects under internal pressure. The micromechanical model is the Gurson model, incorporating void nucleation, growth and coalescence where the burst pressure is predicted based on the critical void volume fraction.The present study involves experimental comparison and numerical studies of the burst pressure of pipe under ductile fracture. The main objective of the present study is to determine the burst pressure of steel pipe using GursonTevaagard model. For the experimental, the results are from the previous research journal. For the finite element analysis, the pipe model is modeled as a 3 dimensional, quarter-model in MSC.PATRAN with MSC.MARC as nonlinear implicit solver. Results with proposed ductile fracture model indicates that predicted failure pressure attain maximum load for all cases, and are in good agreement with experimental data. It also showed that the burst pressure is decreasing for increasing defect depth and length. For the characters of void volume fraction, f, it can be seen that once the void reach void growth, it soon come to void coalescence, where the burst pressures are predicted at critical void and then fracture. The results from gouge defect varies in length is analyze based on the equivalent plastic strain, and the stress triaxially,  where void growth dependent on this two key quantities. Void volume fraction are examined based on the equivalent plastic strain and stress triaxiality on the normalize distance along the defect length and depth. It is found that distribution of equivalent plastic strain agreed well with the void volume fraction and the critical point occur at the defect tip along the defect depth and length.
format	Undergraduates Project Papers
author	Kim Sung, Chong
author_facet	Kim Sung, Chong
author_sort	Kim Sung, Chong
title	Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model
title_short	Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model
title_full	Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model
title_fullStr	Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model
title_full_unstemmed	Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model
title_sort	prediction of burst pressure on steel pipes using gurson-tvergaard-needleman (gtn) model
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/10625/ http://umpir.ump.edu.my/id/eprint/10625/ http://umpir.ump.edu.my/id/eprint/10625/1/FKM-DEGREE-CHONG%20KIM%20SUNG.pdf
first_indexed	2023-09-18T22:10:26Z
last_indexed	2023-09-18T22:10:26Z
_version_	1777414990919106560

Prediction of burst pressure on steel pipes using Gurson-Tvergaard-Needleman (GTN) model

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