A Study on High-speed Disk Bursting Strength

抄録

This paper presents a comparison of the spin-test results of both unnotched and notched disks with a center hole. The unnotched disk bursted after it deformed plastically in quasi-circular shape satisfactorily under approximately steady strain rate. On the other hand, the notched disks deformed in elliptic shape and its change further became greater with an advance of rotating speed because of a severe strain concentration generated around the notch roots and the final bursting at relatively low speed would come quickly. For the unnotched disk the usual average stress theory was adopted as the criterion of burst, but it was not applicable to the notched disks. The measured results of X-ray residual stress in unnotched disk almost coincided with the plastic stress distribution calculated on the basis of the Tresca criterion with the Mises flow rule, but the measured results for the notched disk were different from them.