**IV. TRANSVERSE
SHEAR
LOADING
OF
BEAMS
WITH
**

**
****
CLOSED
CROSS
SECTIONS**
The topics discussed in this section deal with transverse shear loading of
unstiffened or thin-walled stiffened beams with CLOSED cross sections.
Such beams are generally referred to as BOX Beams.
The methods of analysis discussed here are relevant to airplane wing, tail,
and fuselage
structures. However, more reference is given to aircraft wing structures
composed of
a single-cell or a multiple-cell closed box beam.

**Topics covered:**

Flexural shear stress, shear flow, shear center of unstiffened and
thin-walled stiffened sections.

Sections 1 through 4 deal with uniform beams whereas sections 5 and 6 deal
primarily with nonuniform and tapered beams in which the cross-sectional moments
of inertia are not constant.

**Restrictions:**
The beams are considered to be homogeneous and elastic.

IV.1* Single-Cell
Unstiffened Box Beam:
Symmetrical About One Axis
*

IV.2*
Statically Determinate Box Beams With Constant-Shear-Flow Webs
*

IV.3* Single-Cell
Multiple-Flange Box Beams. Symmetric and Unsymmetric Cross Sections
*

IV.4*
Mulitple-Cell Multiple-Flange
Box Beams. Symmetric and Unsymmetric Cross Sections
*

IV.5*
The Determination of the
Flexural Shear Flow Distribution by Considering the Changes in Flange Loads
(The Delta P Method)
*

IV.6* Shear Flow in
Tapered Sheet Panels
*

*TEST Your Knowledge!
*

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Transverse Shear Loading of Open Sections
To Index Page of
Combined Transverse Shear, Bending, and Torsion Loading

*Date of last revision: *