Equations of Equilibrium.

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Equations of Equilibrium.
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Example.
Determine the resultant internal loadings
acting on the cross section at C of the machine
shaft. The shaft is supported by bearings at A
and B, which exert only vertical force on the
shaft.
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Stress.
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Average Normal Stress Distribution.
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Example.
The 80-kg lamp is supported by two rods AB and
BC. If AB has a diameter of 10mm and BC has a
diameter of 8mm, determine the average normal
stress in each rod.
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Average Shear Stress.
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Single Shear.
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Double Shear.
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Example.
The wooden strut is suspended froma10mm
diameter steel rod, which is fastened to the
wall. If the strut supports a vertical load of
5kN, compute the average shear stress in the rod
at the wall and along the two shaded planes of
the strut, one of which is indicated as abcd.
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Solution-
Average shear stress. For the rod, For the strut,
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The average-shear-stress distribution on the
sectioned rod and strut segment as shown in figs.
(d) and (e), respectively. Also shown with these
figures is a typical volume element of the
material taken at a point located on the surface
of each section. Note carefully how the shear
stress must act on each shaded face of these
elements and then on the adjacent faces of the
elements.
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Thankyou