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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Larrosa, Nicolas O.
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Corrosion mechanisms of plasma welded Nickel aluminium bronze immersed in seawatercitations
- 2024Modelling the Effect of Residual Stresses on Damage Accumulation Using a Coupled Crystal Plasticity Phase Field Fracture Approach
- 2024Cohesive zone modelling of hydrogen environmentally assisted cracking for double cantilever beam samples of 7xxx aluminium alloys
- 2023The role of corrosion pit topography on stress concentration
- 2023Investigation of the effect of pitting corrosion on the fatigue strength degradation of structural steel using a short crack modelcitations
- 2023Investigation of the effect of pitting corrosion on the fatigue strength degradation of structural steel using a short crack modelcitations
- 2022Development of a microstructural cohesive zone model for intergranular hydrogen environmentally assisted crackingcitations
- 2022Development of a microstructural cohesive zone model for intergranular hydrogen environmentally assisted crackingcitations
- 2022Sizing limitations of ultrasonic array images for non-sharp defects and their impact on structural integrity assessmentscitations
- 2022The Role of Surface Roughness on Pitting Corrosion Initiation in Nickel Aluminium Bronzes in Aircitations
- 2020Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural modelcitations
- 2020Pit to crack transition and corrosion fatigue lifetime reduction estimations by means of a short crack microstructural modelcitations
- 2020Hydrogen environmentally assisted cracking during static loading of AA7075 and AA7449citations
- 2020Hydrogen environmentally assisted cracking during static loading of AA7075 and AA7449citations
- 2018Linking microstructure and processing defects to mechanical properties of selectively laser melted AlSi10Mg alloycitations
- 2018Corrosion-fatiguecitations
- 2017A transferability approach for reducing excessive conservatism in fracture assessmentscitations
- 2016Ductile fracture modelling and J-Q fracture mechanicscitations
- 2016Blunt defect assessment in the framework of the failure assessment diagramcitations
- 2015Characterization of the effect of notch bluntness on hydrogen embrittlement and fracture behavior using fe analyses
- 2015Fatigue life estimation of pitted specimens by means of an integrated fracture mechanics approachcitations
Places of action
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article
A transferability approach for reducing excessive conservatism in fracture assessments
Abstract
A source of uncertainty and conservatism in structural integrity assessments is the value of fracture toughness (Kmat) that is used. For conservative results, the value of Kmat is commonly derived from deeply cracked specimens, such as standard compact tension specimens, C(T). High constraint conditions near the crack tip are ensured and this corresponds to lower-bound toughness values independent of specimen size and geometry. However, the local stress fields in single edge notched tension, SE(T), specimens and pipes, for example, are known to be less severe than those at the tip of a deep sharp crack, resulting in an increased capacity to sustain load and higher toughness. Similar behaviour is expected when assessing non-sharp defects (e.g., pits, gouges, dents). The constraint loss or the notch effect produce a relaxation in the triaxial stress field in comparison to the severe stress fields present at deeply sharp cracked specimens. A methodology providing a simple procedure to evaluate the suitability of the use of a higher fracture toughness to reduce excessive conservatism is then required. This study uses a two-parameter fracture mechanics approach (J-Q) to quantify the level of constraint in a component (e.g. a pipe with a surface crack) and in fracture test specimens, i.e. single edge tension [SE(T]), standard compact tension [C(T)] and notched compact tension [C(T)ρ] specimens. The ability of the structure to resist fracture is given by the fracture toughness of the test specimen with a similar J-Q response. Fracture toughness values for different specimens have been obtained from tearing resistance curves (J-R curves) constructed by means of a virtual testing framework. The proposed engineering approach is used as a platform to perform more accurate fracture assessments by the use of a ductile fracture model that informs a classical fracture mechanics approach (J-Q) by incorporating more fundamental understanding of the driving forces and the role of the geometry and loading conditions.