Influence of surface integrity on vibration characteristics of microbeams

Shaat, Mohamed; Faroughi, Shirko

doi:10.1016/j.euromechsol.2018.04.009

Cited by 16 publications

(3 citation statements)

References 47 publications

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“…The actual material surface is distinct from the nominal surfaces considered in conventional elasticity. Surface integrity describes the material surface in terms of surface topography, altered layer, and mechanical characteristics [33][34][35]. The influences of the surface roughness on the conductivity [36] and magnetic properties [37]of metals were investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The simultaneous impact of surface and size dependency on the instability of NEMS was investigated in [61][62][63]. Shaat developed a new surface integrity model [34,35]. While the Gurtin-Murdoch model undertakes superpolished surfaces of materials, Shaat's model incorporates the influence of roughness, waviness, the altered layer, and surface energy.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of surface roughness effects on the dynamic performance of electromagnetic nano-resonators

Koochi,

Goharimanesh,

Gharib

2024

Phys. Scr.

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Here, we expose the influence of surface roughness on the dynamics of electromagnetic nano-resonators. To this end, the continuum field equations of an electromechanical nano-resonator subjected to an external magnetic flux are formulated. The developed model considers surface integrity, including surface roughness, waviness, and altered layer. Also, the influence of residual stresses of the extreme surfaces of the resonator is incorporated in the proposed model. It was revealed that the surface roughness significantly tailors the dynamic stability of the resonator, as the voltage that onsets the pull-in instability of the resonator decreases as the surface roughness increases, which thus indicates the necessity of particular calibrations of nano-resonators for surface roughness. To investigate the problem and the effect of factors such as magnetic field intensity, roughness, and beam surface thickness on the pull-in voltage, we have performed an analysis using the Taguchi method and analysis of variance. The results show that the intensity of the magnetic field has the most significant effect on pull-in voltage. Also, the more accurate results show on the resonance frequency; with the increase of the input voltage to the beam, the impact of increasing the intensity of the magnetic field and other factors increases. The rest of the paper proposes a linear and non-linear model to express the pull-in voltage according to the investigated factors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of surface roughness effects on the dynamic performance of electromagnetic nano-resonators

Koochi,

Goharimanesh,

Gharib

2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Conversely, based on processing methods to the surface integrity, several prediction models [14][15][16] were established to describe the relationships between processing parameters and surface integrity characteristics, which can predict the surface performance and service performance of machined parts. Shaat et al [14] proposed a novel surface integrity model to demonstrate the relationships between the surface integrity parameters and vibration behaviours of microbeams. In addition, compared with the Gurtin-Murdoch surface model, the novel model focused on the practical surface characteristics.…”

Section: Introductionmentioning

confidence: 99%