Abbott Aerospace – Analysis Method

XL-VIKINGDisplay Your Math in Excel

Taken from: Analysis and Design of Composite and Metallic Flight Vehicle Structures

Torsion Stiffness

Abbott Aerospace – Analysis Method

XL-VIKINGDisplay Your Math in Excel

Taken from: Analysis and Design of Composite and Metallic Flight Vehicle Structures

Torsion Stiffness

Axial or direct load stiffness is expressed in the following way:

𝑘 =𝑀

𝜃= 𝐺 ∙ 𝐽

Where:𝑴 Moment applied, in-lb𝜽 Rotation about the moment axis, radians𝑮 Material bulk or shear modulus, psi𝑱 Section torsion constant, in4

Torsion stiffness, stress and angular deflection for common cross sections arecalculated in this spreadsheet:

AA-SM-002-001 Torsion - Regular Sections - Rev B