A crack-growth arresting technique in aluminum alloy

Murdani, Anggit; Makabe, Chobin; Saimoto, Akihide; Kondou, Ryouji

doi:10.1016/j.engfailanal.2007.02.005

Cited by 37 publications

(15 citation statements)

References 12 publications

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“…For example, Nateche [12] proposed a drilling repair index method to evaluate the efficiency of crack growth retardation. Murdani et al [13,14] also suggested that the effects of stop holes on crack tip stress field depended on the arrangement of stop holes and proposed a new technology to retard crack growth, in which two ancillary holes were drilled to reduce the stress concentration caused by a stop hole. Razavi et al [15] reported that the double stop hole method had a significant improvement in fatigue life by comparing with the traditional single stop hole method.…”

Section: Introductionmentioning

confidence: 99%

Effects of stop hole on crack turning, residual fatigue life and crack tip stress field

Song

Liu

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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The aim of this paper is to research the effects of stop hole on crack turning, residual fatigue life and crack tip stress field, in which the location, size and shape of stop hole are considered. The numerical model is established according to M-integral technology, and crack turning angle is determined by maximum hoop stress criterion. The calculation results show that stop hole location has a significant effect on crack turning angle and residual fatigue life, and it should be drilled with a reasonable distance in vertical and horizontal direction around crack tip to achieve a better residual fatigue life retardation effect. The larger the stop hole size is, the wider effect range of stop hole on crack turning and residual fatigue life will be. The effects of elliptical stop hole on crack turning angle and residual fatigue life retardation are greater than that of round hole when the distance in vertical direction increases. Crack tip stress distribution is changed by increasing σ y and decreasing σ x , and the most dramatical changes occur at the circumferential direction of 90° and 270°.

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Section: Introductionmentioning

confidence: 99%

Effects of stop hole on crack turning, residual fatigue life and crack tip stress field

Song

Liu

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…10,11 The residual compressive stresses can be generated through overloading, 12,13 Brinell indentation at corner points, [14][15][16][17][18] cold expansion, [19][20][21] laser shock peening, [22][23][24] shot peening, [25][26][27] spot heating, [28][29][30] and drilling holes in the vinicity of the crack tip. [31][32][33][34] Shin et al 31 suggested that the use of hole drilling for extending the fatigue life is more effective than infiltration and safer than applying overloads. However, this procedure can only be used for cracks with nearly straight fronts.…”

Section: Introductionmentioning

confidence: 99%

3D‐FE automatic procedure to evaluate the fatigue life extension by overloading

Perdigão

Cunha

Nogueira

et al. 2020

Mat Design & Process Comms

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The present paper proposes a three-dimensional numerical approach able to account for the effect of overloads on fatigue life extension in cracked geometries. The procedure starts with the analysis of the overload effects on plasticity induced crack closure via a three-dimensional elastic-plastic approach based on the node release technique. Then, the relationships between the crack opening values and the fatigue crack growth rates are introduced into the fatigue crack growth models, developed in the light of the adaptive remeshing concept, to estimate the fatigue lifetime.

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“…e longer fatigue cracks are usually repaired and retrofitted after investigation of the cracking, while shorter cracks are left untreated, due to the high cost and time-consuming. Common approaches, such as hole-drilling [4] and rewelding [5], are useful for crack repair and retrofitting; however, these methods will also cause irrecoverable damage; therefore, a new technique causing no, or less, damage is needed.…”

Section: Introductionmentioning

confidence: 99%

Numerical Model of Plastic Deformation on Cracked Surface under Repeated Pneumatic Impact

Yuanzhou

Sun

et al. 2018

Advances in Materials Science and Engineering

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Crack-closure treatment through repeated impact is supposed to be an effective, economical way to extend the fatigue remaining life for fatigue-affected structures with less damage. The material plastic behavior under repeated impact between chisel and material bodies was investigated, for the purpose of describing the crack-closure effect. A numerical model was established associating the impact depth with the number of impact times and device parameters, which is also proved by experiments. The material properties, after repeated impact, was determined via metallographic analysis and microhardness tests, indicating that the material will be hardened within a small affected zone due to the grain refinement caused by repeated impact. The finite-element method was used, as a supplementary approach, to investigate the relationship between impact depth and horizontal deformation on the cracked surface. A one-to-one linear relation was obtained, even under the different chisel tip parameters. Therefore, the contact of fracture surface, i.e. crack closure, can be predicted with the help of this numerical model and the aforementioned relationship.

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A crack-growth arresting technique in aluminum alloy

Cited by 37 publications

References 12 publications

Effects of stop hole on crack turning, residual fatigue life and crack tip stress field

Effects of stop hole on crack turning, residual fatigue life and crack tip stress field

3D‐FE automatic procedure to evaluate the fatigue life extension by overloading

Numerical Model of Plastic Deformation on Cracked Surface under Repeated Pneumatic Impact

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