principle of virtual work


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principle of virtual work

[′prin·sə·pəl əv ′vər·chə·wəl ‚wərk]
(mechanics)
The principle that the total work done by all forces acting on a system in static equilibrium is zero for any infinitesimal displacement from equilibrium which is consistent with the constraints of the system. Also known as virtual work principle.
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References in periodicals archive ?
The principle of virtual work states that the variation of work W induced by forces [F.
To extend the principle of virtual work for dynamic systems, mass accelerations are introduced.
Then the principle of virtual work is written on each of these elements with a local finite element approximation and evaluated to yield element discrete equations which are then assembled so as to form an approximate membrane representation [11].
The present finite element formulation (11, 15) is based on the principle of virtual work.
Assuming that the membrane is in equilibrium, the principle of virtual work states that, for arbitrary infinitesimal displacements, the change in total strain energy (W) is equal to the work done by the external forces (U) through these displacements.
In order to analyze the overall deformation behavior of the membrane during inflation, the principle of virtual work has to be applied to each element.

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