Stress intensity factor for multiple cracks on curved panels
2018
Authors
Kastratović, GordanaAldarwish, Mustafa
Grbović, Aleksandar
Vidanović, Nenad
Eldwaib, Khalid
Conference object (Published version)
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The aim of this paper is to explore and to demonstrate the capacity, performances and difficulties of stress intensity factors (SIFs) calculations in a case of multiple cracks on curved panels analyzed by means of different computational methods. So-called bulging effect, which is occurring in cracked curved panels, increases the effective stress-intensity factor, making the SIFs assessment in case of multiple cracks more challenging. Here, the stress intensity factors are considered by using two different computational methods: extended finite element method (XFEM) and the approximate method based on superposition, which has been adjusted for curved panel application. The SIFs determination was carried out for aircraft fuselage model: unstiffened panel with three cracked fastener holes, for four different curvature diameters, subjected to uniform internal pressurization. The comparison of the results showed that conducted analyses delivered the data which can be useful in evaluation o...f crack-growth rate, residual strength and fatigue life of curved aircraft structures with multi-site damage.
Keywords:
Stress intensity factor / Multi-site damage / Extended Finite Element Method / curved panelsSource:
Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 2018, 13, 469-474Publisher:
- Elsevier Science Bv, Amsterdam
DOI: 10.1016/j.prostr.2018.12.078
ISSN: 2452-3216
WoS: 000459860900077
Scopus: 2-s2.0-85064653161
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Mašinski fakultetTY - CONF AU - Kastratović, Gordana AU - Aldarwish, Mustafa AU - Grbović, Aleksandar AU - Vidanović, Nenad AU - Eldwaib, Khalid PY - 2018 UR - https://machinery.mas.bg.ac.rs/handle/123456789/2824 AB - The aim of this paper is to explore and to demonstrate the capacity, performances and difficulties of stress intensity factors (SIFs) calculations in a case of multiple cracks on curved panels analyzed by means of different computational methods. So-called bulging effect, which is occurring in cracked curved panels, increases the effective stress-intensity factor, making the SIFs assessment in case of multiple cracks more challenging. Here, the stress intensity factors are considered by using two different computational methods: extended finite element method (XFEM) and the approximate method based on superposition, which has been adjusted for curved panel application. The SIFs determination was carried out for aircraft fuselage model: unstiffened panel with three cracked fastener holes, for four different curvature diameters, subjected to uniform internal pressurization. The comparison of the results showed that conducted analyses delivered the data which can be useful in evaluation of crack-growth rate, residual strength and fatigue life of curved aircraft structures with multi-site damage. PB - Elsevier Science Bv, Amsterdam C3 - Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity T1 - Stress intensity factor for multiple cracks on curved panels EP - 474 SP - 469 VL - 13 DO - 10.1016/j.prostr.2018.12.078 ER -
@conference{ author = "Kastratović, Gordana and Aldarwish, Mustafa and Grbović, Aleksandar and Vidanović, Nenad and Eldwaib, Khalid", year = "2018", abstract = "The aim of this paper is to explore and to demonstrate the capacity, performances and difficulties of stress intensity factors (SIFs) calculations in a case of multiple cracks on curved panels analyzed by means of different computational methods. So-called bulging effect, which is occurring in cracked curved panels, increases the effective stress-intensity factor, making the SIFs assessment in case of multiple cracks more challenging. Here, the stress intensity factors are considered by using two different computational methods: extended finite element method (XFEM) and the approximate method based on superposition, which has been adjusted for curved panel application. The SIFs determination was carried out for aircraft fuselage model: unstiffened panel with three cracked fastener holes, for four different curvature diameters, subjected to uniform internal pressurization. The comparison of the results showed that conducted analyses delivered the data which can be useful in evaluation of crack-growth rate, residual strength and fatigue life of curved aircraft structures with multi-site damage.", publisher = "Elsevier Science Bv, Amsterdam", journal = "Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity", title = "Stress intensity factor for multiple cracks on curved panels", pages = "474-469", volume = "13", doi = "10.1016/j.prostr.2018.12.078" }
Kastratović, G., Aldarwish, M., Grbović, A., Vidanović, N.,& Eldwaib, K.. (2018). Stress intensity factor for multiple cracks on curved panels. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity Elsevier Science Bv, Amsterdam., 13, 469-474. https://doi.org/10.1016/j.prostr.2018.12.078
Kastratović G, Aldarwish M, Grbović A, Vidanović N, Eldwaib K. Stress intensity factor for multiple cracks on curved panels. in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity. 2018;13:469-474. doi:10.1016/j.prostr.2018.12.078 .
Kastratović, Gordana, Aldarwish, Mustafa, Grbović, Aleksandar, Vidanović, Nenad, Eldwaib, Khalid, "Stress intensity factor for multiple cracks on curved panels" in Procedia Structural Integrity - ECF22 - Loading and environmental effects on structural integrity, 13 (2018):469-474, https://doi.org/10.1016/j.prostr.2018.12.078 . .