Beam shear is defined as the internal shear stress of a beam caused by the shear force applied to the beam.

**Beam shear **

Beam shear is defined as the internal shear
stress of a beam caused by the shear force applied to the beam.

where

*V *= total shear force at the location in
question;* *

*Q *=* *statical moment of area;

*t *=
thickness in the mat erial perpendicular to the shear;

*I *=*
*Moment of Inertia* *of the entire cross sectional area.

This formula is also known as t he Jourawski
formula.^{[1]}

**Semi-monocoque shear**

Shear stresses within a semi-
monocoque structure may be calculated by idealizing the cross-section of the
structure into a set of stringers (carrying only axial loads ) and webs
(carrying only shear flows). Dividing th e shear flow by the thickness of a
given portion of the semi-monocoque structure yields the shear stress. Thus,
the maximum shear stre ss will occur either in the web of maximum shear flo w
or minimum thickness.

Also constructions in soil
can fail due to shear; e.g., the we ight of an earth-filled dam or dike may
cause th e subsoil to collapse, like a smalllandslide.

**Impact shear**

The maximum shear stress crea ted in a solid
round bar subject to impact is g iven as the equation:

where

*U *=
change in kinetic e nergy;

*G *=*
*shear modulus;

*V *=
volume of rod;

And

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