# virtual displacement

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## virtual displacement

[′vər·chə·wəl di′splās·mənt]
(mechanics)
Any change in the positions of the particles forming a mechanical system.
An infinitesimal change in the positions of the particles forming a mechanical system, which is consistent with the geometrical constraints on the system.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
where [delta]x is a virtual displacement between two neighboring trajectories of system (1).
According to the virtual displacement principle of elastic mechanics, the momentum equation of coal-rock mass skeleton under quasi-static condition is 
In the finite element method, the coordinates, velocity, acceleration, and virtual displacement are interpolated from their values at the nodes using shape functions, [N.sub.A], where A is the node number.
According to the principle of virtual displacement, it can be obtained:
Using the principle of virtual displacement, the equilibrium equation can be expressed for CLPT as:
That is to say, torque equation can be derived by co-energy and virtual displacement method from electromechanical energy conversion.
The development of corrosion-induced rebar expansion is simulated based on the increase in the virtual displacement resulting from corrosion-induced rebar expansion to understand the effect of the increase in rebar corrosion on the stress field in the surrounding concrete.
The cohesive virtual work [delta][W.sup.coh] is produced by traction vector [t.sub.d] between the faces of the discontinuity rd and the virtual displacement jump vector [[[delta]u]]; thus
According to the principle of virtual displacement, the virtual potential energy [delta]U should vanish at the equilibrium state of the system.
where [delta]u is the virtual displacement and [P.sup.*] is the generalized force.
The governing equations of the third-order nonlocal plate theory can be derived, using the dynamic version of the principle of virtual displacement (Hamilton's principle), as

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