02 Introduction to Virtual work principle | Potential Energy Principles | Simple Beam Numerical 1

Principle of virtual work. In its more general and more useful form, this principle can be stated as follows: If a system of connected rigid bodies Is in equilibrium, the total virtual work of the external forces applied to the system is zero for any virtual displacement of the system,

Virtual work Simple Beam Numerical by geometrical approach

Forces which do no work during a virtual displacement that is consistent with the constraints imposed on the system are:

a. Reactions at supports

b. Internal forces at connections

c. Forces exerted by inextensible cords and cables

None of these forces need be considered when you use the method of virtual work.

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