The fatigue life and fatigue-crack-through-thickness behavior of a surface-cracked plate. (3rd report. In the case of combined tensile and bending stress).

Laminates based on ultrahigh carbon steel were prepared and found to exhibit enhanced fatigue life as compared to a monolithic reference material. This result was achieved through the insertion of weak interlaminar regions of copper into the layered material during preparation of the laminates. The presence of these regions allowed for the operation of a delamination mechanism in advance of the propagating fatigue crack. The result was interlaminar separation and associated crack blunting. Stress-life curves show that an increase in life by as much as a factor of four is achieved for these materials when compared to monolithic specimens of similar processing history.

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Fatigue Crack Growth Analysis with Extended Finite Element for 3D Linear Elastic Material

Metals ◽

10.3390/met11030397 ◽

2021 ◽

Vol 11 (3) ◽

pp. 397

Author(s):

Yahya Ali Fageehi

Keyword(s):

Finite Element ◽

Fatigue Crack ◽

Fatigue Life ◽

Crack Propagation ◽

Crack Growth ◽

Mixed Mode ◽

Propagation Path ◽

Loading Conditions ◽

Extended Finite Element ◽

Linear Elastic

This paper presents computational modeling of a crack growth path under mixed-mode loadings in linear elastic materials and investigates the influence of a hole on both fatigue crack propagation and fatigue life when subjected to constant amplitude loading conditions. Though the crack propagation is inevitable, the simulation specified the crack propagation path such that the critical structure domain was not exceeded. ANSYS Mechanical APDL 19.2 was introduced with the aid of a new feature in ANSYS: Smart Crack growth technology. It predicts the propagation direction and subsequent fatigue life for structural components using the extended finite element method (XFEM). The Paris law model was used to evaluate the mixed-mode fatigue life for both a modified four-point bending beam and a cracked plate with three holes under the linear elastic fracture mechanics (LEFM) assumption. Precise estimates of the stress intensity factors (SIFs), the trajectory of crack growth, and the fatigue life by an incremental crack propagation analysis were recorded. The findings of this analysis are confirmed in published works in terms of crack propagation trajectories under mixed-mode loading conditions.

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The fatigue life and crack through thickness behavior of a surface-cracked plate. For the case of tensile load.

JSME international journal ◽

10.1299/jsme1987.30.1898 ◽

1987 ◽

Vol 30 (270) ◽

pp. 1898-1905 ◽

Cited By ~ 11

Author(s):

Kotoji ANDO ◽

Shinpei FUJIBAYASHI ◽

Ki Woo NAM ◽

Masayuki TAKAHASHI ◽

Nobukazu OGURA

Keyword(s):

Fatigue Life ◽

Tensile Load ◽

Cracked Plate

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Structural and mechanical defects of materials of offshore and onshore main gas pipelines after long-term operation

Open Engineering ◽

10.1515/eng-2015-0045 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 5

Author(s):

Pavlo Maruschak ◽

Sergey Panin ◽

Iryna Danyliuk ◽

Lyubomyr Poberezhnyi ◽

Taras Pyrig ◽

...

Keyword(s):

Fatigue Crack ◽

Fatigue Life ◽

Quantitative Analysis ◽

Stress Concentration ◽

Cyclic Loading ◽

Fatigue Cracks ◽

Preliminary Deformation ◽

Term Operation ◽

Steel Pipes

AbstractThe study has established the main regularities of a fatigue failure of offshore gas steel pipes installed using S-lay and J-lay methods.We have numerically analyzed the influence of preliminary deformation on the fatigue life of 09Mn2Si steel at different amplitudes of cyclic loading. The results have revealed the regularities of formation and development of a fatigue crack in 17Mn1Si steel after 40 years of underground operation. The quantitative analysis describes the regularities of occurrence and growth of fatigue cracks in the presence of a stress concentration.

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Fatigue crack growth of a railway wheel steel and fatigue life prediction under spectrum loading conditions

International Journal of Fatigue ◽

10.1016/j.ijfatigue.2022.106722 ◽

2022 ◽

pp. 106722

Author(s):

Reza Masoudi Nejad ◽

Filippo Berto

Keyword(s):

Fatigue Crack ◽

Fatigue Life ◽

Fatigue Crack Growth ◽

Crack Growth ◽

Life Prediction ◽

Fatigue Life Prediction ◽

Wheel Steel ◽

Loading Conditions ◽

Railway Wheel ◽

Railway Wheel Steel

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Effect of Processing Layer on Fatigue Strength of Extruded AZ61 Magnesium Alloy

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.577-578.429 ◽

2013 ◽

Vol 577-578 ◽

pp. 429-432 ◽

Cited By ~ 1

Author(s):

Yukio Miyashita ◽

Kyohei Kushihata ◽

Toshifumi Kakiuchi ◽

Mitsuhiro Kiyohara

Keyword(s):

Fatigue Crack ◽

Fatigue Life ◽

Fatigue Strength ◽

Magnesium Alloy ◽

Crack Initiation ◽

Crack Growth ◽

Fatigue Crack Initiation ◽

Fatigue Tests ◽

Crack Growth Resistance ◽

Az61 Magnesium Alloy

Fatigue Property of an Extruded AZ61 Magnesium Alloy with the Processing Layer Introduced by Machining was Investigated. Rotating Bending Fatigue Tests were Carried out with the Specimen with and without the Processing Layer. According to Results of the Fatigue Tests, Fatigue Life Significantly Increased by Introducing the Processing Layer to the Specimen Surface. Fatigue Crack Initiation and Propagation Behaviors were Observed by Replication Technique during the Fatigue Test. Fatigue Crack Initiation Life of the Specimen with the Processing Layer was Slightly Longer than that of the Specimen without the Processing Layer. Higher Fatigue Crack Growth Resistance was also Observed when the Fatigue Crack was Growing in the Processing Layer in the Specimen with the Processing Layer. the Longer Fatigue Life Observed in the Fatigue Test in the Specimen with the Processing Layer could be Mainly due to the Higher Crack Growth Resistance. it is Speculated that the Fatigue Strength can be Controlled by Change in Condition of Machining Process. it could be Effective way in Industry to Improved Fatigue Strength only by the Cutting Process without Additional Surface Treatment Process.

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