Fatigue curves of a low carbon steel obtained from vibration experiments with an electrodynamic shaker

Khalij, Leila; Gautrelet, Christophe; Guillet, Alain

doi:10.1016/j.matdes.2015.07.153

Cited by 24 publications

(18 citation statements)

References 22 publications

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“…The test frequencies were fixed values obtained from the transmissibilities recorded between each test. A sinusoidal excitation level was then imposed at this frequency, increasing in increments from 1 to 20 g. We have chosen to follow in this work the same approach as in reference [19]. An analysis of the experiments on a series of five samples was carried out in order to show the influence of the test frequencies.…”

Section: The Experimental Proceduresmentioning

confidence: 99%

“…Some of them were concerned with structure design under random excitations [10][11][12][13] and multiaxial fatigue [14][15][16][17]. Others had established SN curves [18][19][20] or yet damage detection [21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

“…The Laboratory of Mechanic of Normandy (LMN) has set up a vibratory fatigue bench [6,19] consisting of an electrodynamic shaker and a closed-loop control system that allows precise control. In order to set up complex tests (random, multiaxial, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Linearity investigation from a vibratory fatigue bench

Gautrelet¹,

Khalij²,

Appert³

et al. 2019

Mechanics & Industry

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High-cycle fatigue behaviour of structures can be obtained through vibratory tests using frequency response functions or transmissibilities. To this end, this study deals with the qualification of the vibratory fatigue bench developed at the Laboratory of Mechanic of Normandy. This bench uses an electrodynamic shaker which can reach excitation frequencies that are higher than conventional fatigue machines. To carry out relevant tests, the capacities of the test bench must be well known. Correlations between excitation and response were investigated to determine the allowable setpoints to maintain linearity between the input and output signals to validate our system. The difficulties related to the experiments were presented and discussed.

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Section: The Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Linearity investigation from a vibratory fatigue bench

Gautrelet¹,

Khalij²,

Appert³

et al. 2019

Mechanics & Industry

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“…9. The plates on the fixture have been used for high-cycle fatigue tests [19]. The successive mounting and unmounting of the specimens resulted in a permanent deformation of the upper plate.…”

Section: Fig 4 Transmissibilities For Different Excitation Levelsmentioning

confidence: 99%

Development of a test bench for vibratory fatigue experiments of a cantilever beam with an electrodynamic shaker

et al. 2018

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Abstract. When fatigue tests are carried out using a shaker, dynamic phenomena often appear and lead to a non-linear behaviour in the experiment. In this paper, the dynamic response of the specimen is studied in order to evaluate the impact on the results. The experiment consists in a notched beam fixed on the armature of an electro-dynamic shaker. The transfer function between the center of the armature and the tip of the beam is obtained with a swept sine near the first resonance frequency of the specimen. The drive is a constant acceleration amplitude. An evolution in the transfer function of the beam is observed when the drive is modified: the resonance frequency decreases and the damping increases. This non-linearity is investigated by studying the movement of the shaker, the fixture and the beam. The results show that the beam close to its resonance disrupt the imposed movement. An experimental setup correcting those defects is proposed.

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“…Determining the breaking point of a specimen is an aspect that is extremely complex and delicate. The method frequency based damage detection (FBDD) by Kim et al, which proportionally correlates with the shift of the resonance frequency of a system with the accumulation of the damage itself, is the most recognized method in the literature . This affirms that when the resonance frequency goes down by 5% during the test, it is possible to assert that the specimen has broken.…”

Section: Experimental Testsmentioning

confidence: 99%

Experimental multiaxial fatigue tests realized with newly developed geometry specimens

Morettini

Braccesi

Cianetti

2018

Fatigue Fract Eng Mat Struct

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In the literature there are many experimental results of multiaxial fatigue testing, usually generated by the combination of two or more cyclical loads. The cases in which samples are randomly stressed are rarer. Moreover, to generate particular stress states, the use of specific machinery for fatigue tests is usually required. For these reasons, the authors have created a particular geometry of specimens, which, when solicited by a single input of a random type, guarantees the creation of specific multiaxial stress states without using complex and costly instruments. The experimental tests were finally used for the validation of the multiaxial reduction method developed and currently utilized in the authors' design phase, though potentially used to verify all the other methodologies present in the literature.

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Fatigue curves of a low carbon steel obtained from vibration experiments with an electrodynamic shaker

Cited by 24 publications

References 22 publications

Linearity investigation from a vibratory fatigue bench

Linearity investigation from a vibratory fatigue bench

Development of a test bench for vibratory fatigue experiments of a cantilever beam with an electrodynamic shaker

Experimental multiaxial fatigue tests realized with newly developed geometry specimens

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