Dynamics of a composite Timoshenko beam with delamination

Manoach, Emil; Warmiński, Jerzy; Mitura, Andrzej; Samborski, Sylwester

doi:10.1016/j.mechrescom.2012.08.008

Cited by 35 publications

(21 citation statements)

References 12 publications

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“…It is obvious from the gure that the frequencies obtained by the free mode model are smaller than those derived by the constrained mode model are. In other words and as discussed in [27][28][29][30] for classical delaminated beams, the free and constrained mode models can be considered as the lower and upper bounds of the natural frequencies, respectively (neglecting the nonliner e ects due to the contact interaction between the two surfaces of delamination). Likewise, by decreasing the material length-scale parameter, the fundamental natural frequency decreases.…”

Section: Free Vibration Analysismentioning

confidence: 99%

“…The fundamental frequency and linear normal mode of the beam, in uenced by the size and location of delamination, were investigated in their study. Manoach and Warminski [28] presented dynamic behavior of a composite Timoshenko beam with a single delamination. Kargarnovin et al studied on the transient response of a delaminated composite Timoshenko beam under the action of moving loads and moving oscillating masses [29,30].…”

Section: Introductionmentioning

confidence: 99%

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Bending and vibration analysis of delaminated Bernoulli–Euler micro-beams using the modified couple stress theory

et al. 2017

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KEYWORDSAbstract. In this paper, we study static bending and free vibration behaviors of Bernoulli-Euler microbeams with a single delamination using the modi ed couple stress theory. The delaminated beam is modeled by four interconnected sub-beams using the delamination zone as their boundaries. The free and constrained mode theories are utilized to model the interaction of delamination surfaces in the damaged area. The continuity as well as compatibility conditions are satis ed between the neighboring sub-beams. After veri cation of the results for some case studies with available solutions, the e ects of various parameters, such as spanwise and thicknesswise locations of the delamination, material length-scale parameter, and boundary conditions, on the static bending and free vibration characteristics of the size-dependent microbeam, have been investigated in detail.

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Section: Free Vibration Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Bending and vibration analysis of delaminated Bernoulli–Euler micro-beams using the modified couple stress theory

et al. 2017

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“…The RP approach provides a qualitative interpretation of hidden patterns of dynamical systems, based on phase space reconstruction. Phase space analysis methods are widely used for analysis of structural components applied in aircraft [25,26]. The recurrence plot technique was originally introduced by Eckmann [11].…”

Section: Theory Of Recurrence Analysismentioning

confidence: 99%

Dynamics of thin-walled element milling expressed by recurrence analysis

Rusinek

Zaleski

2015

Meccanica

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This paper presents the results of experimental research on the stability of a milling process for producing a thin-walled part made of AL7075 aluminium alloy. The part was machined on a CNC milling machine with a decreasing wall thickness. The acceleration and cutting forces in the process were measured and analyzed to determine stability limit using classical stability diagrams as well as recurrence plots and recurrence quantification analysis.

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“…One of the time-series methods is the method based on the Poincaré maps of the forced response of the structures [3,4]. It was tested and verified experimentally for composite beams with delamination in [5]. This approach was not tested, however, for the important from the practical point of view case for rotating beam.…”

Section: Introductionmentioning

confidence: 99%

Vibration Based Damage Detection of Rotating Beams

2018

Self Cite

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Abstract. The early detection and localization of damages is essential for operation, maintenance and cost of the structures. Because the frequency of vibration cannot be controlled in real-life structures, the methods for damage detection should work for wide range of frequencies. In the current work, the equation of motion of rotating beam is derived and presented and the damage is modelled by reduced thickness. Vibration based methods which use Poincaré maps are implemented for damage localization. It is shown that for clamped-free boundary conditions these methods are not always reliable and their success depends on the excitation frequency. The shapes of vibration of damaged and undamaged beams are shown and it is concluded that appropriate selection criteria should be defined for successful detection and localization of damages.

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Dynamics of a composite Timoshenko beam with delamination

Cited by 35 publications

References 12 publications

Bending and vibration analysis of delaminated Bernoulli–Euler micro-beams using the modified couple stress theory

Bending and vibration analysis of delaminated Bernoulli–Euler micro-beams using the modified couple stress theory

Dynamics of thin-walled element milling expressed by recurrence analysis

Vibration Based Damage Detection of Rotating Beams

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