Application of a Cohesive Zone Model for Simulating Fatigue Crack Growth from Moderate to High <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi mathvariant="normal">Δ</mml:mi><mml:mi>K</mml:mi></mml:math> Levels of Inconel 718

Li, Huan; Li, Jinshan; Yuan, Huang

doi:10.1155/2018/4048386

Cited by 5 publications

(3 citation statements)

References 30 publications

(52 reference statements)

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“…Metals 2024, 14, x FOR PEER REVIEW 9 of 37 logarithmic coordinates, Paris' law (Equation ( 7)) establishes a connection between the stress intensity factor range (ΔK) and the crack growth rate (da/dN). The alterations made to Paris' law for determining crack growth rates proved highly effective in enhancing the accuracy of fatigue life predictions in engineering design [47].…”

Section: Fatigue Crack Growth Rate (Fcgr)mentioning

confidence: 99%

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Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Alqahtani,

Starr,

Khan

2024

Metals

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Aluminium alloys have been integral to numerous engineering applications due to their favourable strength, weight, and corrosion resistance combination. However, the performance of these alloys in coastal environments is a critical concern, as the interplay between fracture toughness and fatigue crack growth rate under such conditions remains relatively unexplored. This comprehensive review addresses this research gap by analysing the intricate relationship between fatigue crack propagation, fracture toughness, and challenging coastal environmental conditions. In view of the increasing utilisation of aluminium alloys in coastal infrastructure and maritime industries, understanding their behaviour under the joint influences of cyclic loading and corrosive coastal atmospheres is imperative. The primary objective of this review is to synthesise the existing knowledge on the subject, identify research gaps, and propose directions for future investigations. The methodology involves an in-depth examination of peer-reviewed literature and experimental studies. The mechanisms driving fatigue crack initiation and propagation in aluminium alloys exposed to saltwater, humidity, and temperature variations are elucidated. Additionally, this review critically evaluates the impact of coastal conditions on fracture toughness, shedding light on the vulnerability of aluminium alloys to sudden fractures in such environments. The variability of fatigue crack growth rates and fracture toughness values across different aluminium alloy compositions and environmental exposures was discussed. Corrosion–fatigue interactions emerge as a key contributor to accelerated crack propagation, underscoring the need for comprehensive mitigation strategies. This review paper highlights the pressing need to understand the behaviour of aluminium alloys under coastal conditions comprehensively. By revealing the existing research gaps and presenting an integrated overview of the intricate mechanisms at play, this study aims to guide further research and engineering efforts towards enhancing the durability and safety of aluminium alloy components in coastal environments.

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Section: Fatigue Crack Growth Rate (Fcgr)mentioning

confidence: 99%

“…The stress intensity factor curve for metallic materials typically exhibits three distinct regimes when it comes to fatigue crack growth rate. Reprinted from ref [47]…”

mentioning

confidence: 99%

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Alqahtani,

Starr,

Khan

2024

Metals

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“…The cohesive element type was the 2D 4-node cohesive element COH2D4. Literature [16,20,[35][36][37] suggests that the plane strain assumption should be used when specimen thickness is in the range of 9-12.5 mm. Literature [12,38] argues that when the CT specimen thickness is in the range of 3-5 mm, the plane stress assumption should be used.…”

Section: Development Of Finite Element Modelsmentioning

confidence: 99%

Experimental and numerical investigations of crack growth of hot-rolled steel Q420C using cohesive zone model

Chen

Wang

et al. 2023

Theoretical and Applied Fracture Mechanics

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Modelling the nucleation and propagation of cracks at twin boundaries

Grilli

Cocks

2021

Int J Fract

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Fracture arising from cracks nucleating and propagating along twin boundaries is commonly observed in metals that exhibit twinning as a plastic deformation mechanism. This phenomenon affects the failure of macroscopic mechanical components, but it is not fully understood. We present simulations in which a continuum model for discrete twins and a cohesive zone model are coupled to aid the understanding of fracture at twin boundaries. The interaction between different twin systems is modelled using a local term that depends on the continuum twin variables. Simulations reveal that the resolved shear stress necessary for an incident twin to propagate through a barrier twin can be up to eight times the resolved shear stress for twin nucleation. Interface elements are used at the interfaces between all bulk elements to simulate arbitrary intragranular cracks. An algorithm to detect twin interfaces is developed and their strength has been calibrated to give good agreement with the experimentally observed fracture path. The elasto-plastic deformation induced by discrete twins is modelled using the crystal plasticity finite element method and the stress induced by twin tips is captured. The tensile stress caused by the tip of an incident twin on a barrier twin is sufficient to nucleate a crack. A typical staircase fracture path, with cracks propagating along the twin interfaces, is reproduced only if the strength of the twin interfaces is decreased to about one-third of the strength of the bulk material. This model can be used to help understand fracture caused by the activation of multiple twin systems in different materials.

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Application of a Cohesive Zone Model for Simulating Fatigue Crack Growth from Moderate to High ΔK Levels of Inconel 718

Cited by 5 publications

References 30 publications

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Fracture Behaviour of Aluminium Alloys under Coastal Environmental Conditions: A Review

Experimental and numerical investigations of crack growth of hot-rolled steel Q420C using cohesive zone model

Modelling the nucleation and propagation of cracks at twin boundaries

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