Development of a novel vibration-based fatigue testing methodology

George, Tommy; Seidt, Jeremy D.; Shen, M.-H. Herman; Nicholas, T.; Cross, Charles

doi:10.1016/j.ijfatigue.2003.10.012

Cited by 129 publications

(85 citation statements)

References 11 publications

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“…This research improves on the approach of George et al [18] by testing at near resonance with a real-time phase-locked control loop, which improves the control of the stress load level. With this enhancement it is possible to monitor the instantaneous modal parameters without any interruptions to the fatigue test.…”

Section: Introductionmentioning

confidence: 92%

“…A further development of the fatigue testing in the resonant area was made by George et al [18], who developed a new methodology based on the dynamic response of the kinematically excited test specimen in the near-resonant area. The proposed methodology can be performed with an electro-dynamical shaker, to which the specimen needs to be fastened.…”

Section: Introductionmentioning

confidence: 99%

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Uninterrupted and accelerated vibrational fatigue testing with simultaneous monitoring of the natural frequency and damping

Česnik

Slavič

Boltežar

2012

Journal of Sound and Vibration

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Section: Introductionmentioning

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Uninterrupted and accelerated vibrational fatigue testing with simultaneous monitoring of the natural frequency and damping

Česnik

Slavič

Boltežar

2012

Journal of Sound and Vibration

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“…Hooreweder et al [5] used this specificity to ensure accurate contact surfaces. In [6], George et al maintained the plate-shaped specimen between two blocks with two screws positioned close to the embedded part. One objective was to reduce the potential damping in the clamp, that's why the maximum torque was applied to the mounting bolts.…”

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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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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“…Over the years, a number of testing methodologies that differ in terms of testing machines, specimen geometry and type of excitation, have been proposed [6][7][8][9][10]. While servo-hydraulic machines normally adopt cylindrical specimens, vibratory tests by shakers tables make use of a wider set of specimen configurations, ranging from simple (plate, cylindrical) to more elaborated layouts (Y-geometry), as already commented in [11].…”

Section: Introductionmentioning

confidence: 99%

An innovative system for uncoupled bending/torsion tests by tri-axis shaker: numerical simulations and experimental results

2018

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Abstract. This work describes a new testing system for applying a coupled/uncoupled bendingtorsion loading in vibratory tests by a tri-axis shaker. The system is composed of a cylindrical specimen with eccentric tip masses, excited by horizontal and/or vertical base accelerations. The specimen tip is constrained by a lateral thin and flexible plate which impedes any bending when the specimen is excited horizontally, but which permits the specimen torsional rotation. This layout then allows torsional and bending deformations to be produced and controlled independently, when vertical and horizontal base accelerations are applied simultaneously. A finite element model is first used to estimate the system dynamic response and the stresses in the notched specimen section. The model is then validated through experimental tests under harmonic base accelerations. The strains at clamping system are also monitored to indirectly estimate the bending and torsion moment in the specimen. Comparison of numerical and experimental results showed a close correlation and proved that bending-torsion loading are truly uncoupled. Preliminary fatigue tests with harmonic bending loading (vertical base excitation) are finally compared to the constant amplitude S-N curve, showing a quite satisfactory agreement.

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Development of a novel vibration-based fatigue testing methodology

Cited by 129 publications

References 11 publications

Uninterrupted and accelerated vibrational fatigue testing with simultaneous monitoring of the natural frequency and damping

Uninterrupted and accelerated vibrational fatigue testing with simultaneous monitoring of the natural frequency and damping

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

An innovative system for uncoupled bending/torsion tests by tri-axis shaker: numerical simulations and experimental results

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