Synthesis of Sine-on-Random vibration profiles for accelerated life tests based on fatigue damage spectrum equivalence

Angeli, Andrea; Cornelis, Bram; Troncossi, Marco

doi:10.1016/j.ymssp.2017.10.022

Cited by 42 publications

(20 citation statements)

References 13 publications

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“…17 that the fixture is not rotating because of the resonance of the beam. The curves correspond to the acceleration given by (2) in the direction of the specimen and (3) for an excitation of 1 g. They can be compared to the previous setup with Fig. 7.…”

Section: Resultsmentioning

confidence: 98%

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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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Section: Resultsmentioning

confidence: 98%

“…He observed that damping increases with the augmentation of specimen tip amplitude and explained it by air damping. A similar fixture is used by Angeli et al [2], Ge et al [3] and Zhou et al [3]. The specimens are fixed with 2 through-the-thickness screws.…”

Section: Introductionmentioning

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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“…In an application, the structures are exposed to a combination of harmonic, random and impulse loads [2,3]. While a combination of harmonic and random loads can be studied in the frequency domain [4,5,6,7], the relationship of an impulse excitation in the time and frequency domains is not well researched. These impulse loads can originate in increased clearances in contacts due to wear, unforeseen use of the component, various loading conditions, etc.…”

Section: Introductionmentioning

confidence: 99%

Vibration fatigue at half-sine impulse excitation in the time and frequency domains

Ogrinec

Slavič

Česnik

et al. 2019

International Journal of Fatigue

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Three types of loads are typical in vibration fatigue: random, harmonic and impact. In an application, any combination of these loads is possible. In vibration fatigue the random loads can be investigated by using the frequencyresponse function of the structure. While the theoretical relationship between the frequency-response function and the impact-response function is clear (they form the Fourier pair), the time/frequency relationship of vibration-fatigue damage has not yet been investigated in detail. The focus of this research is a theoretical study of the time-and frequency-domain damage of a single-degreeof-freedom dynamic system under well-separated half-sine impulse excitation.The introduced theoretical relationship between the time-and frequency-domain (Narrow-band and Tovo-Benasciutti method) damage showed that the significantly different results are related to the underlying dynamic properties (e.g., natural frequency and damping) of a flexible system. Based on the introduced relationship, the frequency-domain damage estimation is corrected for a reliable damage estimation. In addition, an experimental test case is presented. The introduced theoretical relationship opens up new possibilities to investigate the impact excitation in the frequency domain and provides the necessary theoret-

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“…In 2004, George et al gave a brief historical overview of these test benches [4]. The acceleration of vibratory fatigue tests with electrodynamic shakers has become more and more common in recent years [5,6]. These controlled closed-loop vibratory fatigue systems [7,8] can be used at relatively high frequencies (>1 kHz) and therefore reduce the duration of the tests.…”

Section: Introductionmentioning

confidence: 99%

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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Synthesis of Sine-on-Random vibration profiles for accelerated life tests based on fatigue damage spectrum equivalence

Cited by 42 publications

References 13 publications

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

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

Vibration fatigue at half-sine impulse excitation in the time and frequency domains

Linearity investigation from a vibratory fatigue bench

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