The effect of residual stresses arising from laser shock peening on fatigue crack growth
(2010) 3rd International Conference on Crack Paths, 2009 77(11). p.2033-2039- Abstract
- Residual stresses have in the past been introduced to manipulate growth rates and shapes of cracks under cyclic loads. Previously, the effectiveness of shot peening in retarding the rate of fatigue crack growth was experimentally studied. It was shown that the compressive residual stresses arising from the shot peening process can affect the rate of crack growth. Laser shock peening can produce a deeper compressive stress field near the surface than shot peening. This advantage makes this technique desirable for the manipulation of crack growth rates. This paper describes an experimental program that was carried out to establish this effect in which steel specimens were partially laser peened and subsequently subjected to cyclic loading to... (More)
- Residual stresses have in the past been introduced to manipulate growth rates and shapes of cracks under cyclic loads. Previously, the effectiveness of shot peening in retarding the rate of fatigue crack growth was experimentally studied. It was shown that the compressive residual stresses arising from the shot peening process can affect the rate of crack growth. Laser shock peening can produce a deeper compressive stress field near the surface than shot peening. This advantage makes this technique desirable for the manipulation of crack growth rates. This paper describes an experimental program that was carried out to establish this effect in which steel specimens were partially laser peened and subsequently subjected to cyclic loading to grow fatigue cracks. The residual stress fields generated by the laser shock peening process were measured using the neutron diffraction technique. A state of compressive stress was found near the surface and tensile stresses were measured in the mid-thickness of the specimens. Growth rates of the cracks were observed to be more affected by the tensile core than by the compressive surface stresses. (c) 2010 Elsevier Ltd. All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1656050
- author
- Chahardehi, A. ; Brennan, F. P. and Steuwer, Axel LU
- organization
- publishing date
- 2010
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Residual stress, Fatigue crack growth, Laser peening, diffraction, Neutron
- host publication
- Engineering Fracture Mechanics
- volume
- 77
- issue
- 11
- pages
- 2033 - 2039
- publisher
- Elsevier
- conference name
- 3rd International Conference on Crack Paths, 2009
- conference location
- Venice, Italy
- conference dates
- 2009-09-23 - 2009-09-25
- external identifiers
-
- wos:000280285800037
- scopus:77954035730
- ISSN
- 0013-7944
- DOI
- 10.1016/j.engfracmech.2010.03.033
- language
- English
- LU publication?
- yes
- id
- 2753fb1b-8ff5-4a5e-8766-25739fb8b4ad (old id 1656050)
- date added to LUP
- 2016-04-01 14:43:30
- date last changed
- 2022-01-28 02:09:17
@inproceedings{2753fb1b-8ff5-4a5e-8766-25739fb8b4ad,
abstract = {{Residual stresses have in the past been introduced to manipulate growth rates and shapes of cracks under cyclic loads. Previously, the effectiveness of shot peening in retarding the rate of fatigue crack growth was experimentally studied. It was shown that the compressive residual stresses arising from the shot peening process can affect the rate of crack growth. Laser shock peening can produce a deeper compressive stress field near the surface than shot peening. This advantage makes this technique desirable for the manipulation of crack growth rates. This paper describes an experimental program that was carried out to establish this effect in which steel specimens were partially laser peened and subsequently subjected to cyclic loading to grow fatigue cracks. The residual stress fields generated by the laser shock peening process were measured using the neutron diffraction technique. A state of compressive stress was found near the surface and tensile stresses were measured in the mid-thickness of the specimens. Growth rates of the cracks were observed to be more affected by the tensile core than by the compressive surface stresses. (c) 2010 Elsevier Ltd. All rights reserved.}},
author = {{Chahardehi, A. and Brennan, F. P. and Steuwer, Axel}},
booktitle = {{Engineering Fracture Mechanics}},
issn = {{0013-7944}},
keywords = {{Residual stress; Fatigue crack growth; Laser peening; diffraction; Neutron}},
language = {{eng}},
number = {{11}},
pages = {{2033--2039}},
publisher = {{Elsevier}},
title = {{The effect of residual stresses arising from laser shock peening on fatigue crack growth}},
url = {{http://dx.doi.org/10.1016/j.engfracmech.2010.03.033}},
doi = {{10.1016/j.engfracmech.2010.03.033}},
volume = {{77}},
year = {{2010}},
}