|Table of Contents |Section Contents|

CHARTS OF THEORETICAL STRESS-CONCENTRATION FACTORS

GROOVED ROUND BAR IN TORSION

Nomenclature:
tau0 = shear stress without concentration factor
T = Loading torque
D = un-grooved bar diameter
d = grooved bar diameter
r = groove radius
J = Bar polar moment of inertia
c = Distance to shear element

Relationships:
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c = d / 2
J = 3.14159 * d^4 / 32
tau0 = T * c / J