Influence of the transformation of a non-proportional multiaxial loading to a proportional one on the high cycle fatigue life

Chamat, A.; Azari, Z.; Jodin, P.; Gilgert, J.; Dominiak, S.

doi:10.1016/j.ijfatigue.2007.09.003

Cited by 5 publications

(2 citation statements)

References 11 publications

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“…In the case of constant amplitude fatigue (Iqbal et al 2002;Newman et al 1999), the allowable stress amplitude method is recommended in the code for designing steel structures in China, in which the stress amplitude [∆σ] is determined by the S-N relation curve obtained in constant amplitude fatigue experiments. In the case of variable amplitude fatigue (Chamat et al 2008;Miner 1945), the damage degree D is adopted to estimate the fatigue life of the joint, according to the modified linear cumulative damage law. Fatigue failure of the bolted spherical ball is caused mainly by the stress concentration contributed by notch effects (Verreman and Limodin 2008;Medekshas and Balina 2006;Yamguchi et al 2004;Choi and Kim 2008).…”

Section: Ductility and Fatigue Performance Of The Visual Bolt-ball Jointmentioning

confidence: 99%

Experimental Study on the Mechanical Property of Visual Bolt-Ball Joint System

Wang

Kai

Liu

et al. 2013

Advances in Structural Engineering

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Grid structures with bolted spherical joints suffer impairment because of the “fake tightened-up” phenomenon. To prevent the “fake tightened-up” phenomenon, this study presents a new type of visual bolt-ball joint system that visually and effectively estimates the length of threads inserted into the bolt hole after adjusting the position of the fixed trip bolt and the location of the chute. The ultimate bearing capacity of the high-strength bolt and sleeve are studied via experiments. Results show that the failure section of high-strength bolts is the inclined section, which has a 60° angle to the direction of the screw, and a formula for calculating the ultimate bearing capacity is derived. Sleeves are compressed as their bearing failure is strength failure, which is due to yielding of the net section. A design method of the visual bolt-ball joint system is put forward according to the experimental results, and the safety of the visual bolt-ball joint is verified. Finally, the ductility and the fatigue performance of the visual bolt-ball joint are discussed in the paper.

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Section: Ductility and Fatigue Performance Of The Visual Bolt-ball Jointmentioning

confidence: 99%

Experimental Study on the Mechanical Property of Visual Bolt-Ball Joint System

Wang

Kai

Liu

et al. 2013

Advances in Structural Engineering

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“…A strain parameter for evaluation of multiaxial LCF life under non-proportional loading has been proposed by Itoh et al [5][6][7]. However, there is few studies discussing high cycle fatigue strength under the non-proportional loading [8,9]. One of the reason that the testing time takes very long and no suitable testing machine to adapt to the test conditions with high frequency has existed.…”

Section: Introductionmentioning

confidence: 99%

Development of Bending and Torsion Fatigue Testing Machine for Multiaxial Non-Proportional Loading

Morishita

Itoh

Sakane

2016

AMM

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This study presents a newly developed multiaxial high cycle fatigue testing machine which can load a cyclic bending loading and a reversed torsion loading onto an hour-glass shaped solid bar specimen. This testing machine can perform the fatigue tests with a high frequency under a proportional and a non-proportional loading conditions. In the non-proportional loading, principal directions of stress and strain are changed in a cycle. In the testing machine, the loading is generated by centrifugal force caused by the revolving weights attached to rotational wheels. The maximum frequency of the testing machine is 50Hz. A material tested was a type 304 stainless steel. In the test, two types of loading paths are employed, a proportional loading and a non-proportional loading. The former is a cyclic bending loading and the latter a combining cyclic bending and reversed torsion loading in the developed testing machine. In this study, an applicability of the testing machine is evaluated by carrying out the tests under these loading conditions.

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