MecMovies 4.0 : M5.7: Rigid Bar and Two Axial Members

The figure shows the deflection suffered by the supporting rods. The deflection at point B which is 380 millimeters to the right of point A is v subscript B and the deflection at point C which is 760 millimeters from point A is v subscript c.

The deformaton in bar $(1)$ can be determined by considering the initial and final lengths of the axial member. The initial length of bar $(1)$ is $L_{init} = L_{1}$ , and the length after deformation is $L_{final} = L_{1} + v_{B}$ . The deformation of bar $(1)$ can be found from:

$δ_{1} = L_{final} - L_{init} = L_{1} + v_{B} - L_{1} = v_{B}$

Similarly, the deformation of bar $(2)$ can be determined from its initial and final lengths:

$δ_{2} = L_{final} - L_{init} = L_{2} + v_{C} - L_{2} = v_{C}$