62420 2025 eng 1 23 314 article Elsevier Ltd. 1 -- -- -- Safety-relevant components, for which a failure in service could have catastrophic consequences, are usually designed for extremely low probability of failure and they are subjected to stringent part qualification procedures according to guidelines set by regulatory agencies. Manufacturers are often forced to perform tests on full scale or scaled components to ensure the structural integrity under defined loading conditions, which usually implies a huge experimental and financial effort. Therefore, companies try to develop new strategies such as digital twins, which allow to massively reduce costs, without compromising safety. This work presents a new quasi-static testing and assessment concept, the main idea of which is to replace, or at least reduce, the experimental testing on components by testing specimens representative of the component. Fracture mechanics specimens have been designed iteratively by numerical simulations to match the stress state at the crack-tip of the maximum permissible defect defined by regulatory agencies for the component. Potentially, the major benefit of the proposed approach is that the tests can be performed on conventional laboratory testing machines. The effectiveness of the methodology is demonstrated in case of the structural integrity assessment of a Ni-base superalloy aero-engine turbine disk at overspeed conditions. Engineering Fracture Mechanics 10.1016/j.engfracmech.2024.110710 0013-7944 urn:nbn:de:kobv:b43-624208 publish 16.01.2025 false true Creative Commons - CC BY - Namensnennung 4.0 International Jiangchao Zhu Mauro Madia Michael Schurig Julius Kruse Fabian Conrad Hartmut Schlums Christian Kontermann Uwe Zerbst eng uncontrolled Structural integrity eng uncontrolled Turbine disk eng uncontrolled Burst eng uncontrolled Fracture mechanics eng uncontrolled Representative specimens eng uncontrolled Quasi-static testing Ingenieurwissenschaften und zugeordnete Tätigkeiten 9 Komponentensicherheit 9.4 Integrität von Schweißverbindungen Material Degradationsmechanismen Verlagsliteratur Datei für die Öffentlichkeit verfügbar ("Open Access") Wissenschaftliche Artikel der BAM Bundesanstalt für Materialforschung und -prüfung (BAM) https://opus4.kobv.de/opus4-bam/files/62420/2025_Zhu_et_al.pdf