CyclicCyclic torsion, often referred to as cyclicCyclic twisting, denotes the repeated application of torque, that is, twisting moments to a material or structural componentComponent. This kind of loadingLoading can accumulate damageDamage over timeTime, ultimately resulting in torsionalTorsional fatigueFatigue failure even when the applied torque is well below the material’s monotonic torsionalTorsional strength. The working principle of cyclicCyclic torsion involves imposing alternating shear stressesStress upon a material’s cross-section as the structure experiences repeated twisting and untwisting motions.