Assessment of low cycle fatigue strength of notched components

Medekshas, H.; Balina, V. S.

doi:10.1016/j.matdes.2004.09.015

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…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). The effect of stress concentration on fatigue strength can be…”

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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“…Such an iron is quite plastic, tensile, resistant to impact loading and easy welded after selecting a proper technology and a material for electrodes. Testing of such a connection for cyclic loading according to the programme coordinated with real structural element operational loading, when the number of cycles exceeds 10 8 , is necessary for ensuring the longevity for the exploited and being designed structures [14][15][16][17][18][19]. From the point of view of the fracture mechanics the fatigue diagram is important -the dependence of crack growth rate on stress intensity factor K, allowing to estimate the material cyclic strength from the beginning of crack formation up to complete failure.…”

Section: Testing Proceduresmentioning

confidence: 99%

High-cyclic failure analysis of welded cast iron plates

Stonkus

Leonavičius

Petraitis

et al. 2011

mech

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“…Experimental evidences have validated Neuber’s rule for notched fatigue specimens 7 and specimens under multiaxial stress–strain conditions. 8,9 Further research efforts 10–17 have applied Neuber’s rule to predict the fatigue life for a wide range of notched specimens and materials. Recently, Zappalorto and Lazzarin 18–20 have modified the Neuber’s rule to incorporate the dependence on the notch opening angle and the inelastic response of the materials in the control volume surrounding the notch tip.…”

Section: Introductionmentioning

confidence: 99%

A modified Neuber’s rule for welded cruciform joints under low-cycle actions

Feng

Qian

2017

The Journal of Strain Analysis for Engineering Design

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This article presents a modified Neuber's rule to estimate the inelastic stress and strain at the toe of welded plate connections under large-scale cyclic yielding, caused by the low-cycle fatigue loadings. In contrast to the original Neuber's rule, which usually overestimates the notch-tip elastic-plastic stress and strain as the applied nominal stress approaches or exceeds the material yield strength, the modified Neuber's rule provides a convenient and accurate estimation of the stress and strain at the weld toe as an alternative to the time-consuming numerical computation. The numerical study covers the variations in both the geometric configuration and the material properties in the modified Neuber's rule. This article also provides closed-form expressions for the two critical parameters in the modified Neuber's rule to facilitate engineering applications.

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Assessment of low cycle fatigue strength of notched components

Cited by 11 publications

References 15 publications

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

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

High-cyclic failure analysis of welded cast iron plates

A modified Neuber’s rule for welded cruciform joints under low-cycle actions

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