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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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Mackenzie, Donald
University of Strathclyde
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (12/12 displayed)
- 2019New formulation of nonlinear kinematic hardening model, part IIcitations
- 2019New formulation of nonlinear kinematic hardening model, part Icitations
- 2018High cycle fatigue analysis in the presence of autofrettage compressive residual stresscitations
- 2018Fatigue and corrosion fatigue life assessment with application to autofrettaged partscitations
- 2017Consideration of weld distortion throughout the identification of fatigue curve parameters using mean stress correction
- 2017On cyclic yield strength in definition of limits for characterisation of fatigue and creep behaviourcitations
- 2017Implementation of plasticity model for a steel with mixed cyclic softening and hardening and its application to fatigue assessments
- 2014Safe structural design for fatigue and creep using cyclic yield strength
- 2014Cyclic yield strength in definition of design limits for fatigue and creepcitations
- 2013A fully implicit, lower bound, multi-axial solution strategy for direct ratchet boundary evaluationcitations
- 2012A fully implicit multi-axial solution strategy for direct ratchet boundary evaluation
- 2010Parametric finite-element studies on the effect of tool shape in friction stir weldingcitations
Places of action
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document
Safe structural design for fatigue and creep using cyclic yield strength
Abstract
This study proposes cyclic yield strength (CYS, σ_cy) as a potential characteristic of safe design for structures operating under fatigue and creep conditions. CYS is defined on a cyclic stress-strain curve (SSC), while monotonic yield strength (MYS, σ_my) is defined on a monotonic SSC. Both values of σ_cy and σ_my are identified using a 2-step fitting procedure of the experimental SSCs using Ramberg-Osgood and Chaboche material models. A typical S-N curve in stress-life approach for fatigue analysis has a distinctive minimum stress lower bound, the fatigue endurance limit (FEL, σ_f-lim). Comparison of σ_cy and σ_f-lim reveals that they are approximately equal. Thus, safe fatigue design is guaranteed in the purely elastic domain defined by the σ_cy. A typical long-term strength (LTS) curve in time-to-failure approach for creep analysis has 2 inflections corresponding to the σ_cy and σ_my. These inflections separate 3 sections on a LTS curve, which are characterised by different creep fracture modes and creep deformation mechanisms. Thus, safe creep design is guaranteed in the linear creep domain with brittle failure mode defined by the σ_cy. These assumptions are confirmed using 3 structural steels for normal and high-temperature applications. The advantage of using σ_cy for characterisation of fatigue and creep strength is a relatively quick experimental identification. The total duration of cyclic tests for a cyclic SSC identification is much less than the typical durations of fatigue and creep rupture tests at the stress levels around the σ_cy.