TY - CONF

T1 - FATIGUE LIMIT ASSESSMENT OF INTERACTING SMALL DEFECTS BY CYCLIC R-CURVE ANALYSIS

AU - Fladischer, Stefan

AU - Stoschka, Michael

AU - Grun, Florian

N1 - Conference code: 24

PY - 2024/8/26

Y1 - 2024/8/26

N2 - This study focuses on the numerical simulation of short crack growth to investigate geometric interaction effects between small neighboring defects under consideration of crack closure. In an extensive parameter study, circular cracks of various sizes and interaction distances are investigated. The simulation procedure follows a cyclic R-curve analysis in order to determine the fatigue limit of maximum non-propagating crack formation. The interaction effects are quantified in the form of novel geometry factors for interacting cracks as well as the degradation of the fatigue limit due to crack size and proximity. The results are compared to experimental validation tests performed on additively manufactured specimens containing artificial defects.

AB - This study focuses on the numerical simulation of short crack growth to investigate geometric interaction effects between small neighboring defects under consideration of crack closure. In an extensive parameter study, circular cracks of various sizes and interaction distances are investigated. The simulation procedure follows a cyclic R-curve analysis in order to determine the fatigue limit of maximum non-propagating crack formation. The interaction effects are quantified in the form of novel geometry factors for interacting cracks as well as the degradation of the fatigue limit due to crack size and proximity. The results are compared to experimental validation tests performed on additively manufactured specimens containing artificial defects.

M3 - Abstract

T2 - European Conference on Fracture 2024

Y2 - 26 August 2024 through 30 August 2024

ER -