Boundary element method analysis on T-shape structure with crack

When a structure is subjected to loading, stress will build up within the structure. The localized stress depends on the geometry of the structure. Computational method using boundary element method (BEM) was used to analyze the stress of a T-shape structure with a fillet subjected to biaxial loadin...

Full description

Saved in:
Bibliographic Details
Main Author: Koh, Yiwei.
Other Authors: Ang Hock Eng
Format: Final Year Project
Language:English
Published: 2009
Subjects:
Online Access:http://hdl.handle.net/10356/16106
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-16106
record_format dspace
spelling sg-ntu-dr.10356-161062023-03-04T19:26:15Z Boundary element method analysis on T-shape structure with crack Koh, Yiwei. Ang Hock Eng School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics When a structure is subjected to loading, stress will build up within the structure. The localized stress depends on the geometry of the structure. Computational method using boundary element method (BEM) was used to analyze the stress of a T-shape structure with a fillet subjected to biaxial loading. The T-shape structure is analyzed on plan stress condition. Stress analysis was carried out on T-shape structure without crack. In the region of high stress concentration, a crack slanted at 45 degree is on the T-shape structure. Localized constraint was imposed on the head and the shoulder of the T-shape structure. The constraint will cause a bending effect as an axial force is applied at the end of the shank. Computational result obtained are compared with similar analysis from finite element method (FEM). Result from cases that are without a crack show the highest stress concentration factor is found in the fillet region ranging from 0.6 to 4. Furthermore, as the head thickness, H, decreases the stress concentration factor increases. However, when the shank diameter, d, decreases the stress concentration factor decreases. In the presence of crack , the highest normalised stress intensity factor shift from the fillet region to the crack tip region. The same trends of the variation of normalised stress intensity factor was observed for a thick head, H, and a small shank diameter, d, will achieve a lower normalised stress intensity factor. Generally, the computational analysis agrees well with result from FEM analysis. Bachelor of Engineering 2009-05-21T03:37:42Z 2009-05-21T03:37:42Z 2009 2009 Final Year Project (FYP) http://hdl.handle.net/10356/16106 en Nanyang Technological University 152 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::Mechanics and dynamics
spellingShingle DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
Koh, Yiwei.
Boundary element method analysis on T-shape structure with crack
description When a structure is subjected to loading, stress will build up within the structure. The localized stress depends on the geometry of the structure. Computational method using boundary element method (BEM) was used to analyze the stress of a T-shape structure with a fillet subjected to biaxial loading. The T-shape structure is analyzed on plan stress condition. Stress analysis was carried out on T-shape structure without crack. In the region of high stress concentration, a crack slanted at 45 degree is on the T-shape structure. Localized constraint was imposed on the head and the shoulder of the T-shape structure. The constraint will cause a bending effect as an axial force is applied at the end of the shank. Computational result obtained are compared with similar analysis from finite element method (FEM). Result from cases that are without a crack show the highest stress concentration factor is found in the fillet region ranging from 0.6 to 4. Furthermore, as the head thickness, H, decreases the stress concentration factor increases. However, when the shank diameter, d, decreases the stress concentration factor decreases. In the presence of crack , the highest normalised stress intensity factor shift from the fillet region to the crack tip region. The same trends of the variation of normalised stress intensity factor was observed for a thick head, H, and a small shank diameter, d, will achieve a lower normalised stress intensity factor. Generally, the computational analysis agrees well with result from FEM analysis.
author2 Ang Hock Eng
author_facet Ang Hock Eng
Koh, Yiwei.
format Final Year Project
author Koh, Yiwei.
author_sort Koh, Yiwei.
title Boundary element method analysis on T-shape structure with crack
title_short Boundary element method analysis on T-shape structure with crack
title_full Boundary element method analysis on T-shape structure with crack
title_fullStr Boundary element method analysis on T-shape structure with crack
title_full_unstemmed Boundary element method analysis on T-shape structure with crack
title_sort boundary element method analysis on t-shape structure with crack
publishDate 2009
url http://hdl.handle.net/10356/16106
_version_ 1759856579837952000