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crack influences on the static and dynamic characteristic of a micro-beam subjected to electro statically loading
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نویسنده
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shahani a.r. ,rezazadeh g. ,rahmani a.
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منبع
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journal of solid mechanics - 2018 - دوره : 10 - شماره : 3 - صفحه:603 -620
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چکیده
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In the present work the pull-in voltage of a micro cracked cantilever beam subjected to nonlinear electrostatic pressure was studied. two mathematical models were employed for modeling the problem: a lumped mass model and a classical beam model. the effect of crack in the lumped mass model is the reduction of the effective stiffness of the beam and in the beam model; the crack is modeled as a massless rotational spring the compliance of which is related to the crack depth. using these two models the pull-in voltage is extracted in the static and dynamic cases. stability analysis is also accomplished. it has been observed that the pull-in voltage decreases as the crack depth increases and also when the crack approaches the clamped support of the beam. the finding of this research can further be used as a non-destructive test procedure for detecting cracks in micro-beams.
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کلیدواژه
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mems ,cracked micro-beam ,stability analysis
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آدرس
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k.n. toosi university of technology, faculty of mechanical engineering, department of applied mechanics, ایران, urmia university, mechanical engineering departments, ایران, k.n. toosi university of technology, faculty of mechanical engineering, department of applied mechanics, ایران
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Authors
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