Fatigue crack growth acceleration in S355 steel under a single and periodic underload

Liang, Hang; Wang, Dongpo; Deng, Caiyan; Zhan, Rui

doi:10.1016/j.ijfatigue.2022.106744

Cited by 17 publications

(11 citation statements)

References 38 publications

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“…19 Additionally, literature has indicated that such underloads usually have the effect of accelerating the following crack growth. [22][23][24][25] Other studies on AA7050-T7451 have shown that the acceleration caused by underloads is at a maximum for small crack lengths (<1 mm) and reduces as the crack grows. 26 It may be that any fractographic features that correlate with this acceleration would similarly be diminished as the crack grows, be it in an absolute or a comparative manner.…”

Section: Introductionmentioning

confidence: 98%

An analysis of fatigue crack features at various crack lengths through mating fracture surface pairs

Field,

Kandare,

Dixon

et al. 2024

Fatigue Fract Eng Mat Struct

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This paper presents a novel high‐resolution direct analysis of mating AA7050‐T7451 fracture surfaces at crack lengths from 0.1 to 1.3 mm (Kmax of 4.51 to 16.39 MPa√m) for the purpose of analyzing the fatigue growth mechanisms. The various fractographic features observed at these crack lengths were then compared to the known accelerative effects of an applied loading sequence that contained underloads at regular intervals. A correlation was found between some of the observed features and the local fatigue crack growth rate. This study provides new insight into the prominent mechanisms that dictate crack growth rate and ultimately should assist with developing crack growth prediction methods that more accurately represent the physics of the fatigue crack growth mechanisms.

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Section: Introductionmentioning

confidence: 98%

An analysis of fatigue crack features at various crack lengths through mating fracture surface pairs

Field,

Kandare,

Dixon

et al. 2024

Fatigue Fract Eng Mat Struct

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show abstract

“…The service environment requires that the S355 thick plate should have good mechanical properties, and the tensile plasticity in normal direction (ND) of the thick plate is one of its important mechanical properties. [1][2][3] The thick plate has three different directions, transverse direction (TD), rolling direction (RD), and ND, as shown in Figure 1. The reduction of area of the tensile fracture is the form of tensile plasticity characterization.…”

Section: Introductionmentioning

confidence: 99%

Cause Analysis of Low Tensile Plasticity in Normal Direction for Hot‐Rolled Thick Plate of HSLA Steel

Shen

Cheng

Zhang³

et al. 2023

steel research int.

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“…In this case, metallic materials (alloys) were mostly the objects under study. For instance, the crack propagation patterns were quantitatively investigated for mixed loading modes [17][18][19][20] At the same time, no visible and optically perceived changes could be revealed at the crack initiation stage (i.e., accumulation of scattered damages), even when high microscope magnifications were utilized [21].…”

Section: Introductionmentioning

confidence: 99%

An Automated Optical Strain Measurement System for Estimating Polymer Degradation under Fatigue Testing

Bogdanov

Panin

Lyubutin

et al. 2022

Sensors

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(1) Background: this study deals with design of an automated laboratory facility based on a servo-hydraulic testing machine for estimating parameters of mechanical hysteresis loops by means of the digital image correlation (DIC) method. (2) Methods: the paper presents a description of the testing facility, describes the grounds for calculating the elastic modulus, the offset yield strength (OYS) and the parameters of the mechanical hysteresis loops by the DIC method. (3) Results: the developed hardware-software facility was tested by studying the fatigue process in neat polyimide (PI) under various amplitude tension-tension loadings. It was found that the damage accumulation was accompanied by the decrease in the loop areas, while failure occurred when it reduced by at least ~5 kJ/m3. (4) Conclusions: it was shown that lowering the loop area along with changing the secant modulus value makes it possible to estimate the level of the scattered damage accumulation (mainly at the stresses above the OYS level). It was revealed that fractography data, namely the pattern and sizes of the fatigue crack initiation and propagation zones, did not correlate well with the dependences of the parameters of the hysteresis loops.

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Fatigue crack growth acceleration in S355 steel under a single and periodic underload

Cited by 17 publications

References 38 publications

An analysis of fatigue crack features at various crack lengths through mating fracture surface pairs

An analysis of fatigue crack features at various crack lengths through mating fracture surface pairs

Cause Analysis of Low Tensile Plasticity in Normal Direction for Hot‐Rolled Thick Plate of HSLA Steel

An Automated Optical Strain Measurement System for Estimating Polymer Degradation under Fatigue Testing

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