Structural performance of laser welded edge joints made of high-strength steel
Laser welding is a widely-used fusion welding process in industry. However, laser welding is not a common welding process in the manufacture of industrial crane structures. There has been a remarkable increase in the available strength classes of steel grades over the last 10 years, such that streng...
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ftunivturku:oai:www.utupub.fi:10024/162700 2023-05-15T17:09:13+02:00 Structural performance of laser welded edge joints made of high-strength steel 18th Nordic Laser Materials Processing Conference (18th NOLAMP) 18th-20th January 2022, Luleå, Sweden Peippo Juha Salminen Antti Björk Timo Ahola Antti konetekniikka, Konetekniikka 2610201 2022-10-28T13:05:16Z 012019 https://www.utupub.fi/handle/10024/162700 https://iopscience.iop.org/article/10.1088/1757-899X/1135/1/012019 en eng United Kingdom Britannia GB IOP Conference Series: Materials Science and Engineering 1135 Nordic Laser Materials Processing Conference 10.1088/1757-899X/1135/1/012019 1757-8981 https://www.utupub.fi/handle/10024/162700 https://iopscience.iop.org/article/10.1088/1757-899X/1135/1/012019 URN:NBN:fi-fe2022081154419 2022 ftunivturku 2022-11-03T00:00:36Z Laser welding is a widely-used fusion welding process in industry. However, laser welding is not a common welding process in the manufacture of industrial crane structures. There has been a remarkable increase in the available strength classes of steel grades over the last 10 years, such that strengths of up to 1200 MPa are now commercially available. This enables the use of thinner materials in welded products and at the same time, has opened up new possibilities for using laser welding more widely in the manufacture of steel structures. This study focuses on the static and fatigue strength of the laser-welded joints. Details investigated are edge joint with flange preparation between two rectangular tubes and edge joint between flat bar and rectangular tube. A novel fatigue strength assessment concept, the FAT(mod) method, is applied to assess the theoretical fatigue performance of the joint in comparison with the effective notch stress method with a FAT630 design curve. The FAT mod method is based on the local stress ratio at a fatigue-critical point of the joint and the analysis considers the strength of the material, surface quality and applied stress ratio in the assessment of fatigue. The study shows that the samples failed from the base material side in static tests and the FAT(mod) method developed was found to agree well with the test results. Other/Unknown Material Luleå Luleå Luleå University of Turku: UTUPub |
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Open Polar |
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University of Turku: UTUPub |
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ftunivturku |
language |
English |
description |
Laser welding is a widely-used fusion welding process in industry. However, laser welding is not a common welding process in the manufacture of industrial crane structures. There has been a remarkable increase in the available strength classes of steel grades over the last 10 years, such that strengths of up to 1200 MPa are now commercially available. This enables the use of thinner materials in welded products and at the same time, has opened up new possibilities for using laser welding more widely in the manufacture of steel structures. This study focuses on the static and fatigue strength of the laser-welded joints. Details investigated are edge joint with flange preparation between two rectangular tubes and edge joint between flat bar and rectangular tube. A novel fatigue strength assessment concept, the FAT(mod) method, is applied to assess the theoretical fatigue performance of the joint in comparison with the effective notch stress method with a FAT630 design curve. The FAT mod method is based on the local stress ratio at a fatigue-critical point of the joint and the analysis considers the strength of the material, surface quality and applied stress ratio in the assessment of fatigue. The study shows that the samples failed from the base material side in static tests and the FAT(mod) method developed was found to agree well with the test results. |
author2 |
konetekniikka, Konetekniikka 2610201 |
author |
Peippo Juha Salminen Antti Björk Timo Ahola Antti |
spellingShingle |
Peippo Juha Salminen Antti Björk Timo Ahola Antti Structural performance of laser welded edge joints made of high-strength steel |
author_facet |
Peippo Juha Salminen Antti Björk Timo Ahola Antti |
author_sort |
Peippo Juha |
title |
Structural performance of laser welded edge joints made of high-strength steel |
title_short |
Structural performance of laser welded edge joints made of high-strength steel |
title_full |
Structural performance of laser welded edge joints made of high-strength steel |
title_fullStr |
Structural performance of laser welded edge joints made of high-strength steel |
title_full_unstemmed |
Structural performance of laser welded edge joints made of high-strength steel |
title_sort |
structural performance of laser welded edge joints made of high-strength steel |
publisher |
United Kingdom |
publishDate |
2022 |
url |
https://www.utupub.fi/handle/10024/162700 https://iopscience.iop.org/article/10.1088/1757-899X/1135/1/012019 |
genre |
Luleå Luleå Luleå |
genre_facet |
Luleå Luleå Luleå |
op_relation |
IOP Conference Series: Materials Science and Engineering 1135 Nordic Laser Materials Processing Conference 10.1088/1757-899X/1135/1/012019 1757-8981 https://www.utupub.fi/handle/10024/162700 https://iopscience.iop.org/article/10.1088/1757-899X/1135/1/012019 URN:NBN:fi-fe2022081154419 |
_version_ |
1766065189769183232 |