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Static pull tests on the new bolt show that it can elongate to any expected length at a high load level, thereby absorbing a large amount of energy to maintain the stability of surrounding rock.
Static pull tests and dynamic drop tests show that the bolt length elongates by 14 20% at a load level equal to the strength of the bolt material, thereby absorbing a large amount of energy.
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In this study, the static pull-in instability of nanocantilever beams immersed in a liquid electrolyte is theoretically investigated.
The results show that the non-dimensional static pull-in voltage of the studied case is about 5.23 (38.6 V).
For this purpose, the static pull-out (tension) and push-in (compression) tests were conducted on T-joints.
Size-dependent parameters of polysilicon are chosen in order to minimize the difference between calculated and experimental values for static pull-in voltages.
A new universal pull-in formula is also developed for predicting the occurrence of the static pull-in and validated using numerical simulations.
As an application to micro electro mechanical systems (MEMS), the effect of size-dependent shear deformation on static pull-in voltage of an electrostatic microbridge is studied.
On the other hand, according to the results, the non-dimensional dynamic pull-in of the diaphragm is about 4.74 (34.98 V), which is as low as 90.63% of the static pull-in threshold.
Then, an analytical solution for the static pull-in voltage is derived from the lumped model of the system and Taylor expansion of the electrostatic force with fringing field effect.
The results show that the inclusion of a second magnetic force with an attractive interaction results in a delay in the static pull-in and a decrease in the fundamental natural frequency for same spacing distances.
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CEO of Professional Science Editing for Scientists @ prosciediting.com