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Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel

The fracture toughness of structural material is a matter of vital interest in residual life and safety assessment work. Many structures in service today were erected in a time when safety requirements in terms of notch or fracture toughness were not specified. This means that often very little is k...

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Main Author: Talib, Jamilah
Format: Thesis
Language:English
English
Published: 2004
Online Access:http://psasir.upm.edu.my/id/eprint/499/2/549733_FK_2004_75.pdf
http://psasir.upm.edu.my/id/eprint/499/
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spelling my.upm.eprints.4992013-05-27T06:48:46Z http://psasir.upm.edu.my/id/eprint/499/ Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel Talib, Jamilah The fracture toughness of structural material is a matter of vital interest in residual life and safety assessment work. Many structures in service today were erected in a time when safety requirements in terms of notch or fracture toughness were not specified. This means that often very little is known about the defect tolerance of such structures under various loading conditions. The effect of intermediate loading rates upon fracture toughness of structural material has not been widely reported compared with static or very high loading rates. In the present work, the effect of intermediate loading rates upon fracture toughness and yield strength properties of aluminium alloy 7010-T7651 and mild steel has been investigated. The experimental study has been done on compact tension specimen and tensile specimen of both materials at different cross-head speeds. The effect of increased cross-head speed is found to increase yield strength properties and to reduce the fracture toughness values of aluminium alloy and mild steel. Numerical modelling using finite element software LUSAS has been done and well predicted the load versus crack mouth opening displacement of the specimen imposed with load. The results show that Stress Intensity Factor, J-integral and Crack Tip Opening Displacement at certain values of load applied can be found from the energy method. 2004-06 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/499/2/549733_FK_2004_75.pdf Talib, Jamilah (2004) Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel. Masters thesis, Universiti Putra Malaysia. English
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
English
description The fracture toughness of structural material is a matter of vital interest in residual life and safety assessment work. Many structures in service today were erected in a time when safety requirements in terms of notch or fracture toughness were not specified. This means that often very little is known about the defect tolerance of such structures under various loading conditions. The effect of intermediate loading rates upon fracture toughness of structural material has not been widely reported compared with static or very high loading rates. In the present work, the effect of intermediate loading rates upon fracture toughness and yield strength properties of aluminium alloy 7010-T7651 and mild steel has been investigated. The experimental study has been done on compact tension specimen and tensile specimen of both materials at different cross-head speeds. The effect of increased cross-head speed is found to increase yield strength properties and to reduce the fracture toughness values of aluminium alloy and mild steel. Numerical modelling using finite element software LUSAS has been done and well predicted the load versus crack mouth opening displacement of the specimen imposed with load. The results show that Stress Intensity Factor, J-integral and Crack Tip Opening Displacement at certain values of load applied can be found from the energy method.
format Thesis
author Talib, Jamilah
spellingShingle Talib, Jamilah
Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel
author_facet Talib, Jamilah
author_sort Talib, Jamilah
title Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel
title_short Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel
title_full Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel
title_fullStr Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel
title_full_unstemmed Effect of Loading Rate on Fracture Toughness Measurement of 7010 Aluminium Alloy and Mild Steel
title_sort effect of loading rate on fracture toughness measurement of 7010 aluminium alloy and mild steel
publishDate 2004
url http://psasir.upm.edu.my/id/eprint/499/2/549733_FK_2004_75.pdf
http://psasir.upm.edu.my/id/eprint/499/
_version_ 1643821840838164480
score 13.211869

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