Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures
Experimental tests were carried out to assess the fatigue strength of four types of welded joints, made of AH36 steel and used for ship structures. The joints differ for the presence of weld defects and for the thickness value. Fatigue tests were carried out applying axial cyclic loads at a frequenc...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-03-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/3/444 |
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| author | Vincenzo Crupi Gabriella Epasto Eugenio Guglielmino Alberto Marinò |
| author_facet | Vincenzo Crupi Gabriella Epasto Eugenio Guglielmino Alberto Marinò |
| author_sort | Vincenzo Crupi |
| collection | DOAJ |
| description | Experimental tests were carried out to assess the fatigue strength of four types of welded joints, made of AH36 steel and used for ship structures. The joints differ for the presence of weld defects and for the thickness value. Fatigue tests were carried out applying axial cyclic loads at a frequency of 20 Hz and at a stress ratio R = 0.5. The temperature e increment of the specimen surface was detected during the load application by means of an infrared camera. The analysis of the thermographic images allowed the assessment of both the fatigue strength of the welded joints, applying the rapid thermographic method, and the S-N curve by the energy approach. Moreover, 3D computed tomography was used for the analysis of the defective welded joints. |
| first_indexed | 2024-03-10T13:27:04Z |
| format | Article |
| id | doaj.art-642a1fd44af2467bbcc866a238cbc381 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T13:27:04Z |
| publishDate | 2021-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-642a1fd44af2467bbcc866a238cbc3812023-11-21T09:35:40ZengMDPI AGMetals2075-47012021-03-0111344410.3390/met11030444Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship StructuresVincenzo Crupi0Gabriella Epasto1Eugenio Guglielmino2Alberto Marinò3Department of Engineering, University of Messina, 98166 Messina, ItalyDepartment of Engineering, University of Messina, 98166 Messina, ItalyDepartment of Engineering, University of Messina, 98166 Messina, ItalyDepartment of Engineering and Architecture, University of Trieste, 34127 Trieste, ItalyExperimental tests were carried out to assess the fatigue strength of four types of welded joints, made of AH36 steel and used for ship structures. The joints differ for the presence of weld defects and for the thickness value. Fatigue tests were carried out applying axial cyclic loads at a frequency of 20 Hz and at a stress ratio R = 0.5. The temperature e increment of the specimen surface was detected during the load application by means of an infrared camera. The analysis of the thermographic images allowed the assessment of both the fatigue strength of the welded joints, applying the rapid thermographic method, and the S-N curve by the energy approach. Moreover, 3D computed tomography was used for the analysis of the defective welded joints.https://www.mdpi.com/2075-4701/11/3/444fatigueS-N curvethermographic methodwelded jointsship structurescomputed tomography |
| spellingShingle | Vincenzo Crupi Gabriella Epasto Eugenio Guglielmino Alberto Marinò Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures Metals fatigue S-N curve thermographic method welded joints ship structures computed tomography |
| title | Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures |
| title_full | Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures |
| title_fullStr | Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures |
| title_full_unstemmed | Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures |
| title_short | Influence of Weld-Porosity Defects on Fatigue Strength of AH36 Butt Joints Used in Ship Structures |
| title_sort | influence of weld porosity defects on fatigue strength of ah36 butt joints used in ship structures |
| topic | fatigue S-N curve thermographic method welded joints ship structures computed tomography |
| url | https://www.mdpi.com/2075-4701/11/3/444 |
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