Finite element modeling of pressure vessel with two internal surface crack
Апстракт
This paper deals with the finite element modeling of the pressure vessel with two artificial internal surface cracks, one positioned in the vessel center and the other one close to the vessel cover. Cracks are made by electroerosion, with radius at the tip 0.1 mm. The pressure vessel has been experimentally investigated to determine strain distribution by suitably positioned strain gages along smooth portions of the path for J integral direct measurement, as the first phase of the structural integrity assessment procedure. In order to verify numerical procedure, different finite element models are used, one complex model with two cracks and two simple models, each with a single crack. Boundary conditions are identified as the most difficult problem in the finite element modeling process, requiring special attention. In order to verify the model validity, numerical and experimental results are compared. The equivalent (von Mises) stress and strain distribution indicated good agreement n...ot only between the numerical and experimental results, but also between the results for different numerical models, proving that the simple finite element models can be used for a reliable prediction of strain and stress distribution. The J integral has been evaluated using the simplified procedure, based on the fact that the bending-traction term is negligible along the whole path for direct measurement, whereas the strain energy term can be neglected along the paths parallel to the crack plane. In this way the complicated integration along three dimensional path is reduced to the simple evaluation of two area integrals. Although not verified on the pressure vessel itslef, this procedure has been verified by similar investigation done on plates.
Извор:
11th International Conference on Fracture 2005, ICF11, 2005, 3, 2356-2361Scopus: 2-s2.0-84869808000
Институција/група
Inovacioni centarTY - CONF AU - Argoub, Omar Emhamed AU - Sedmak, Aleksandar AU - Burzić, Zijah AU - Adžiev, Gorgi PY - 2005 UR - https://machinery.mas.bg.ac.rs/handle/123456789/470 AB - This paper deals with the finite element modeling of the pressure vessel with two artificial internal surface cracks, one positioned in the vessel center and the other one close to the vessel cover. Cracks are made by electroerosion, with radius at the tip 0.1 mm. The pressure vessel has been experimentally investigated to determine strain distribution by suitably positioned strain gages along smooth portions of the path for J integral direct measurement, as the first phase of the structural integrity assessment procedure. In order to verify numerical procedure, different finite element models are used, one complex model with two cracks and two simple models, each with a single crack. Boundary conditions are identified as the most difficult problem in the finite element modeling process, requiring special attention. In order to verify the model validity, numerical and experimental results are compared. The equivalent (von Mises) stress and strain distribution indicated good agreement not only between the numerical and experimental results, but also between the results for different numerical models, proving that the simple finite element models can be used for a reliable prediction of strain and stress distribution. The J integral has been evaluated using the simplified procedure, based on the fact that the bending-traction term is negligible along the whole path for direct measurement, whereas the strain energy term can be neglected along the paths parallel to the crack plane. In this way the complicated integration along three dimensional path is reduced to the simple evaluation of two area integrals. Although not verified on the pressure vessel itslef, this procedure has been verified by similar investigation done on plates. C3 - 11th International Conference on Fracture 2005, ICF11 T1 - Finite element modeling of pressure vessel with two internal surface crack EP - 2361 SP - 2356 VL - 3 UR - https://hdl.handle.net/21.15107/rcub_machinery_470 ER -
@conference{ author = "Argoub, Omar Emhamed and Sedmak, Aleksandar and Burzić, Zijah and Adžiev, Gorgi", year = "2005", abstract = "This paper deals with the finite element modeling of the pressure vessel with two artificial internal surface cracks, one positioned in the vessel center and the other one close to the vessel cover. Cracks are made by electroerosion, with radius at the tip 0.1 mm. The pressure vessel has been experimentally investigated to determine strain distribution by suitably positioned strain gages along smooth portions of the path for J integral direct measurement, as the first phase of the structural integrity assessment procedure. In order to verify numerical procedure, different finite element models are used, one complex model with two cracks and two simple models, each with a single crack. Boundary conditions are identified as the most difficult problem in the finite element modeling process, requiring special attention. In order to verify the model validity, numerical and experimental results are compared. The equivalent (von Mises) stress and strain distribution indicated good agreement not only between the numerical and experimental results, but also between the results for different numerical models, proving that the simple finite element models can be used for a reliable prediction of strain and stress distribution. The J integral has been evaluated using the simplified procedure, based on the fact that the bending-traction term is negligible along the whole path for direct measurement, whereas the strain energy term can be neglected along the paths parallel to the crack plane. In this way the complicated integration along three dimensional path is reduced to the simple evaluation of two area integrals. Although not verified on the pressure vessel itslef, this procedure has been verified by similar investigation done on plates.", journal = "11th International Conference on Fracture 2005, ICF11", title = "Finite element modeling of pressure vessel with two internal surface crack", pages = "2361-2356", volume = "3", url = "https://hdl.handle.net/21.15107/rcub_machinery_470" }
Argoub, O. E., Sedmak, A., Burzić, Z.,& Adžiev, G.. (2005). Finite element modeling of pressure vessel with two internal surface crack. in 11th International Conference on Fracture 2005, ICF11, 3, 2356-2361. https://hdl.handle.net/21.15107/rcub_machinery_470
Argoub OE, Sedmak A, Burzić Z, Adžiev G. Finite element modeling of pressure vessel with two internal surface crack. in 11th International Conference on Fracture 2005, ICF11. 2005;3:2356-2361. https://hdl.handle.net/21.15107/rcub_machinery_470 .
Argoub, Omar Emhamed, Sedmak, Aleksandar, Burzić, Zijah, Adžiev, Gorgi, "Finite element modeling of pressure vessel with two internal surface crack" in 11th International Conference on Fracture 2005, ICF11, 3 (2005):2356-2361, https://hdl.handle.net/21.15107/rcub_machinery_470 .