Damage criterion comparison at unidirectional and alternating torsion of samples

5th International Conference Recent Trends in Structural Materials

Bogatov, A.A.^1 ; Lezhnev, S.N.^2 ; Tolkushkin, A.O.^1

Ural Federal University, Mira street 19, Yekaterinburg, Russia^1

Rudny Industrial Institute, 50 years of October street 38, Rudny, Kazakhstan^2

关键词: Cylindrical samples;    Damage criteria;    Deformation amplitude;    Deformation degrees;    Testing samples;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/461/1/012086/pdf
DOI  :  10.1088/1757-899X/461/1/012086

来源: IOP

【 摘 要 】

The paper presents the results of the analysis of computer simulation of unidirectional and alternating torsion of cylindrical samples in the software complex Deform 3D. The accumulated deformation degree and damage criterion were taken as compared parameters. Damage was calculated by two existing methods: Cockroft-Latham and Bogatov methods. The results of the analysis show that the proposed method for determining the damage criterion is more accurate when testing samples for alternating twisting than the most currently used method since it takes into account the number of loading stages and the plastic deformation amplitude.