Calculate the resistance of a shaft or member to torsional deformation.
Member Properties
Pa
m⁴
m
N·m
Calculation Results
Enter material and geometry details
About this calculator
Quick Reference
kTorsional Stiffness
GShear Modulus
JTorsional Constant
LMember Length
Overview
Torsional stiffness (k) is a measure of the torque required to produce a unit of angular twist in a member. It is influenced by the material's shear modulus and the cross-section's geometry.
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Pro Tips
Stiffness is calculated as k = (G · J) / L.
Shear Modulus (G) for steel is approx 79 GPa.
Units of stiffness are typically N·m/rad.
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Fun Facts
"The torsional stiffness of a car's chassis affects its handling and vibration characteristics."
"Torsion bars are often used in tank suspensions because of their high energy density."
"Longer shafts are less stiff than shorter shafts of the same diameter."
