Results 131 to 140 of about 518 (167)
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
J M Vasco-Olmo +2 more
exaly +7 more sources
Three-dimensional numerical study of thickness effect on plastic CTOD and monotonic plastic zone in an aluminium CT specimen [PDF]
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
D Camas, Ricardo Branco, F V Antunes
exaly +6 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.
J M Vasco-Olmo +2 more
exaly +7 more sources
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
Alejandro S Cruces +2 more
exaly +4 more sources
Fatigue crack growth versus plastic CTOD in the 304L stainless steel
Engineering Fracture Mechanics, 2019 Abstract The plastic CTOD range, δp, which quantifies crack tip plastic deformation, is used to study fatigue crack propagation instead of the classical ΔK elastic parameter. A da/dN-δp model was defined for the 304L stainless steel. da/dN was obtained experimentally in standard CT specimens while δp was predicted numerically using the finite element
F V Antunes +2 more
exaly +3 more sources
International Journal of Fatigue, 2023 T1, Q1 (15/183 en Mechanical Engineering, IF 2023 = 5.7)
G L G Gonzales, F V Antunes, D M Neto
exaly +4 more sources
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Dugdale plastic zone size and CTOD equations for the compact specimen
International Journal of Fracture, 1984With the aim of applying the Dugdale model to the compact specimen, the equations for stress intensity factor and crack surface displacement are obtained for a pair of pin loads and a uniform stress acting on a segment of the crack surface. The plastic zone size is calculated from the 'finiteness' condition of Dugdale, and the results agree well with ...
J C Newman, Newman J C, Mall S
exaly +2 more sources
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.
M N James +2 more
exaly +3 more sources
Numerical determination of plastic
AbstractIn previous works, a da/dN versus plastic crack tip opening displacement model was proposed to study fatigue crack growth. The plastic crack tip opening displacement, δp, which quantifies the crack tip plastic deformation, is determined numerically using the finite element method.
F.V. Antunes +3 more
openaire +1 more source
Engineering Fracture Mechanics, 2016
Abstract The plastic strain accumulation at the crack tips are used as controlling parameter to estimate cyclic CTOD for low-cycle failure analysis of the central-through cracked plate. The second order polynomial for the normalized CTOD defined as a function of the accumulative plastic strain, the ratio of mean stress to the yield stress, and the ...
Junlin Deng
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Abstract The plastic strain accumulation at the crack tips are used as controlling parameter to estimate cyclic CTOD for low-cycle failure analysis of the central-through cracked plate. The second order polynomial for the normalized CTOD defined as a function of the accumulative plastic strain, the ratio of mean stress to the yield stress, and the ...
Junlin Deng
exaly +2 more sources