Results 1 to 10 of about 102 (79)
Crack Growth in Ni-Cr-Mo-V Steel Using ΔCTOD Elastic–Plastic Model
Journal of Marine Science and Engineering, 2022 Many studies have shown that the linear elastic fracture mechanics (LEFM) method based on the stress intensity factor range (ΔK) has limitations that cannot be ignored. Due to neglecting the influence of plastic deformation near the crack tip, LEFM shows
Jingxia Yue +3 more
doaj +4 more sources
Effect of numerical parameters on plastic CTOD [PDF]
Fracture and Structural Integrity, 2017 Fatigue crack growth (FCG) is associated with irreversible and non-linear processes happening at the crack tip. This explains different problems observed in the use of da/dN-?K curves, namely the inability to explain stress ratio and load history effects.
F.V. Antunes +3 more
doaj +4 more sources
Numerical Study on the Variability of Plastic CTOD [PDF]
Materials, 2020 This paper presents a numerical study on the influence of material parameters and loading variability in the plastic crack tip opening displacement (CTOD) results. For this purpose, AA7050-T6 was selected as reference material and a middle-cracked tension specimen geometry was considered. The studied input parameters were the Young’s modulus, Poisson’s
Pedro Prates, Micael Borges
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Characterisation of fatigue crack growth using digital image correlation measurements of plastic CTOD [PDF]
Theoretical and Applied Fracture Mechanics, 2019 Crack tip opening displacement (CTOD) was measured using digital image correlation (DIC) and resolved into elastic and plastic CTOD components via an offset compliance technique. The plastic CTOD range gave a single linear correlation for fatigue crack growth rate at stress ratios of 0.1 and 0.6 in compact- tension (CT) specimens of Grade 2 titanium. A
Fernando Antunes +2 more
exaly +4 more sources
Theoretical and Applied Fracture Mechanics, 2023 This work is a numerical study of CT specimens with straight cracks and different thickness values submitted to different load levels, which aims to analyse the shape and dimension variations of the monotonic yielded area near the crack tip, examining the impact of variables such as load magnitude, thickness of the specimen and position along the crack
Daniel Camas +2 more
exaly +5 more sources
Plastic CTOD as fatigue crack growth characterising parameter in 2024‐T3 and 7050‐T6 aluminium alloys using DIC [PDF]
Fatigue and Fracture of Engineering Materials and Structures, 2020 AbstractThe plastic range of crack tip opening displacement (CTOD) has been used for the experimental characterisation of fatigue crack growth for 2024‐T3 and 7050‐T6 aluminium alloys using digital image correlation (DIC). Analysis of a complete loading cycle allowed resolving the CTOD into elastic and plastic components.
Fernando Antunes +1 more
exaly +4 more sources
International Journal of Fatigue, 2023 T1, Q1 (15/183 en Mechanical Engineering, IF 2023 = 5.7)
Giancarlo L Gomez Gonzales +1 more
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Procedia Structural Integrity, 2022 This work presents a new approach based on the Crack Tip Opening Displacement (CTOD) for studying the fatigue crack growth. The plastic component of the CTOD is employed for predicting the crack propagation on austenitic stainless steel. This is in contrast to Linear Elastic Fracture Mechanics analysis based on the Stress Intensity Factor (SIF) (Ewalds
Fernando Antunes, As Cruces
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Characterisation of fatigue crack growth using the CJP model of crack tip fields or plastic CTOD
Procedia Structural Integrity, 2019 Abstract This paper provides an update on the current status of work that has been done to validate the CJP model of crack tip stresses and also summarises some findings from linked work that has used DIC to determine the range of plastic crack tip opening displacement as a correlator of fatigue crack growth rate.
F A Diaz, J M Vasco-Olmo, F V Antunes
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Experimental evaluation of CTOD in constant amplitude fatigue crack growth from crack tip displacement fields [PDF]
Fracture and Structural Integrity, 2017 In the current work an experimental study of the crack tip opening displacement (CTOD) is performed to evaluate the ability of this parameter to characterise fatigue crack growth.
J.M. Vasco-Olmo +3 more
doaj +3 more sources