ASE 4423
Aircraft Structures II
Course Outline
Current Text: Analysis and Design of Flight Vehicle Structures by Bruhn,
S.R. Jacos & Associates, Inc.

Pure Torsion
- Torsion of Members with Circular Cross-Sections
- (a) Elastic and Homogeneous
- (b) Elastic and Non-homogeneous
- (c) Inelastic and Homogeneous
- (d) Inelastic and Non-homogeneous
- (e) Residual Stress Distribution
- Transmission of Power by a Cylindrical Shaft
- Torsion of Members with Non-Circular Cross-Sections
- Elastic Membrane Analogy
- Torsion of Open Sections Composed of Thin Plates
- Torsion of Solid Non-Circular Shapes and Thick-Walled
Tubular Shapes
- Torsion of Thin-Walled Closed Sections
- Expression for Torsional Moment in Terms of Internal
Shear Flow Systems
for Multiple-Cell Closed Sections
- Distribution of Torsional Shear Stresses in a
Multiple-Cell Thin-Walled Closed-Section: Angle of Twist
- Stress Distribution and Angle of Twist for 2-Cell
Thin-Walled Closed Section
- Torsion of Thin-Walled Cylinders Having Closed Type
Stiffeners
- Effect of End Restraint on Members Carrying Torsion

Pure Bending
- Review
- Product of Inertia
- Parallel Axis Theorem
- Elastic and Homogeneous Beam Bending for Symmetric Loading
- (a) Neutral Axis Location
- (b) Normal Stress Distribution (Eq. A13.13)
- (c) Symmetric and Unsymmetric Cross Sections
- Elastic and Homogeneous Beam Bending for Unsymmetric Loading
- (a) Neutral Axis Location
- (b) Normal Stress Distribution (Eq. A13.13)
- (c) Symmetric and Unsymmetric Cross Sections
- Elastic an Non-homogeneous Beam Bending for Symmetric Loading
- (a) Neutral Axis Location
- (b) Normal Stress Distribution
- (c) Symmetric and Unsymmetric Cross Sections
- Inelastic and Homogeneous Beam Bending for Symmetric Loading
- (a) Neutral Axis Location
- (b) Normal Stress Distribution
- (c) Symmetric and Unsymmetric Cross Sections
- Curved Beams: Stresses within the Elastic Range for Symmetric Loading
- (a) Neutral Axis Location
- (b) Normal Stress Distribution
- (c) Symmetric Cross Sections

Transverse Shear Loading of Beams with OPEN Cross Sections
- Shear Center Definition
- Formula for Average Flexural Shear Stress
Restrictions:
- (a) Elastic Condition
- (b) Constant Moment of Inertia (uniform) Beams
- (c) Solid Symmetric Cross-Section
- (d) Applied Shear Loads Passing Through the Shear Center
- Maximum Shear Stresses for Simple Cross-Sections
- Derivation of Flexural Shear Flow Equation.
Symmetrical Beam Section
- Shear Flow, Shear Stress and Shear Center for Beam Sections with
One Axis of Symmetry
- Shear Flow and Shear Stresses Determined for Two Cases:
- Applied Shear Loads Passing Through the Shear Center
- Applied Shear Loads NOT Passing Through the Shear Center
- Shear Stress for Unsymmetrical Beam Sections
- Shear Flow and Shear Stress for Unsymmetrical Beam Sections
- Beams With Constant Shear Flow Webs (i.e., skin-stringer type structures)

Transverse Shear Loading of Beams with CLOSED Cross Sections
- Single Cell Beam: Symmetrical About One Axis
The Entire Section Effective in Bending. Shear Flow Distribution Obtained by
- (a) Shear Center Method
- (b) Direct Method
- Single Cell - Two Flange Beam. Constant Shear Flow Webs
- (a) Shear Flow Distribution
- (b) Shear Center Calculation
- Single Cell - Three Flange Beam. Constant Shear Flow Webs
- (a) Shear Flow Distribution
- (b) Shear Center Calculation
- Single Cell - Multiple Flange Beams. Symmetric and Unsymmetric
- Multiple Cell - Multiple Flange Beams. Symmetrical and Unsymmetric
- The Determination of the Flexural Shear Flow
Distribution by Considering the Changes in Flange Loads (The Delta P
Method)
- Shear Flow in Tapered Sheet Panel
Shear Flow Distribution and Axial Force Calculations in Tapered
Multiple Flange Single- and Two-Cell Beams

Combined Loading
- Torsion and Bending Combination
- Torsion, Bending, and Internal Pressure Combination
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