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مکانیک::
پیکربندی تغییرشکل یافته
In the deformed configuration, the material points X(*) and X(y) experience displacements, U(*) and u^, respectively, as shown in Fig. 2.2.
where y^ is the position vector of point in the deformed configuration and y^
Similarly, y^ is the position vector of point x^ in the deformed configuration and y^,-) is the position vector of the first material point that interacts with point X(jy The strain energy density, , of material point x^ can be expressed as a summation of micropotentials, arising from the interaction of material point
The difference between the locations of material points at x and x' in the deformed configuration can be written by using the state notation as
in which VQ) represents the volume of material point j, and the direction of the force density vector is aligned with the relative position vector in the deformed configuration.
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