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Relaxation of residual stress part 2: relaxation of stage 2

Problem statement: Compressive residual stress induced by surface treatment such as shot peening increased component's fatigue life. However the initial induced residual stresses relax during component operating life and it is important to consider the relaxation in the design. Approach: In thi...

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Main Authors: Zaroog, Omar Suliman, Ali, Aidy, Sahari, Barkawi, Zahari, Rizal
Format: Article
Language:English
Published: Science Publications 2009
Online Access:http://psasir.upm.edu.my/id/eprint/16505/1/ajeassp.2009.759.763.pdf
http://psasir.upm.edu.my/id/eprint/16505/
http://thescipub.com/abstract/10.3844/ajeassp.2009.759.763
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spelling my.upm.eprints.165052017-12-05T01:50:09Z http://psasir.upm.edu.my/id/eprint/16505/ Relaxation of residual stress part 2: relaxation of stage 2 Zaroog, Omar Suliman Ali, Aidy Sahari, Barkawi Zahari, Rizal Problem statement: Compressive residual stress induced by surface treatment such as shot peening increased component's fatigue life. However the initial induced residual stresses relax during component operating life and it is important to consider the relaxation in the design. Approach: In this study, a 2024-T351 aluminum alloy specimens were shot peened into three shot peening intensities condition to induce compressive residual stresses. Then fatigue test for two loads was performed for the 10, 1000 and 10000 cyclic loads. The initial residual stresses at the initial condition and after 10, 1000 and 10000 cycle of fatigue loading were measured using X-ray diffraction method. Results: The results showed that the relaxation of the residual stress for the load 15.5 kN is less than the relaxation of the load 30 kN for the three shot peening intensity. The maximum relaxation for load 15.5 kN is 46% of the initial residual stress at 10000 cycles for intensity 0.009 A while the maximum relaxation for load 30 kN is 54% at 10000 cycles for the intensity of 0.0054% A. this result indicated that the residual stress relaxation depended on the load amplitude. Conclusion: The initial residual stress did not remain stable during the component's fatigue life. Within the second phase relaxation, micro-plastic strains accumulating from cycle to cycle. The residual stress relaxation for second phase is in logarithmic relationship. Science Publications 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/16505/1/ajeassp.2009.759.763.pdf Zaroog, Omar Suliman and Ali, Aidy and Sahari, Barkawi and Zahari, Rizal (2009) Relaxation of residual stress part 2: relaxation of stage 2. American Journal of Engineering and Applied Sciences, 2 (4). pp. 759-763. ISSN 1941-7020; ESSN: 1941-7039 http://thescipub.com/abstract/10.3844/ajeassp.2009.759.763 10.3844/ajeassp.2009.759.763
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
description Problem statement: Compressive residual stress induced by surface treatment such as shot peening increased component's fatigue life. However the initial induced residual stresses relax during component operating life and it is important to consider the relaxation in the design. Approach: In this study, a 2024-T351 aluminum alloy specimens were shot peened into three shot peening intensities condition to induce compressive residual stresses. Then fatigue test for two loads was performed for the 10, 1000 and 10000 cyclic loads. The initial residual stresses at the initial condition and after 10, 1000 and 10000 cycle of fatigue loading were measured using X-ray diffraction method. Results: The results showed that the relaxation of the residual stress for the load 15.5 kN is less than the relaxation of the load 30 kN for the three shot peening intensity. The maximum relaxation for load 15.5 kN is 46% of the initial residual stress at 10000 cycles for intensity 0.009 A while the maximum relaxation for load 30 kN is 54% at 10000 cycles for the intensity of 0.0054% A. this result indicated that the residual stress relaxation depended on the load amplitude. Conclusion: The initial residual stress did not remain stable during the component's fatigue life. Within the second phase relaxation, micro-plastic strains accumulating from cycle to cycle. The residual stress relaxation for second phase is in logarithmic relationship.
format Article
author Zaroog, Omar Suliman
Ali, Aidy
Sahari, Barkawi
Zahari, Rizal
spellingShingle Zaroog, Omar Suliman
Ali, Aidy
Sahari, Barkawi
Zahari, Rizal
Relaxation of residual stress part 2: relaxation of stage 2
author_facet Zaroog, Omar Suliman
Ali, Aidy
Sahari, Barkawi
Zahari, Rizal
author_sort Zaroog, Omar Suliman
title Relaxation of residual stress part 2: relaxation of stage 2
title_short Relaxation of residual stress part 2: relaxation of stage 2
title_full Relaxation of residual stress part 2: relaxation of stage 2
title_fullStr Relaxation of residual stress part 2: relaxation of stage 2
title_full_unstemmed Relaxation of residual stress part 2: relaxation of stage 2
title_sort relaxation of residual stress part 2: relaxation of stage 2
publisher Science Publications
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/16505/1/ajeassp.2009.759.763.pdf
http://psasir.upm.edu.my/id/eprint/16505/
http://thescipub.com/abstract/10.3844/ajeassp.2009.759.763
_version_ 1643826233693175808
score 13.211869

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