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One-dimensional nanostructured materials are often used as beams in many applications such as ultrahigh-frequency resonators and ultrasensitive sensors.Compared with usual macroscopic beams,nanobeams have much higher surface/volume ratios so that their surface energies may play a significant role.Besides,they often bear large deflections due to their typically large slenderness ratios and larger elastic ranges.There is,however,lack of a theory that takes into account of both the above two features owned by nanobeams.In this paper,we present such a theory and give applied examples to show that surface energy and large deflection may individually or jointly have notable effects.
One-dimensional nanostructured materials are often used as beams in many applications such as ultrahigh-frequency resonators and ultrasensitive sensors. Compared with usual macroscopic beams, nanobeams have much higher surface / volume ratios so that their surface energies may play a significant role. they often bear large deflections due to their typically large slenderness ratios and larger elastic ranges.There is, however, lack of a theory that takes into account of both the above two features owned by nanobeams.In this paper, we present such a theory and give applied examples to show that surface energy and large deflection may individually or jointly have notable effects.