TY - JOUR A1 - Duarte, Larissa A1 - Madia, Mauro A1 - Zerbst, Uwe A1 - SchΓΆnherr, J. A. A1 - Geilen, M. B. A1 - Klein, M. A1 - Oechsner, M. T1 - Recent developments in the determination of fatigue crack propagation thresholds T2 - International Journal of Fatigue N2 - The impact of crack closure and environmental effects on the experimental determination of the fatigue crack propagation threshold is a major problem for the assessment of cyclically loaded components, especially at low stress ratios 𝑅. In this work, the influence of the experimental procedure and air humidity on dπ‘Žβˆ•d𝑁 βˆ’ π›₯𝐾 data at different 𝑅 is discussed. Unlike the results at 𝑅 = βˆ’1, the threshold values obtained at 𝑅 β‰ˆ 0.8, i.e. under negligible crack closure levels, show a very small scatter band regardless of the variation of the test parameters and environmental conditions. PB - Elsevier Ltd. KW - Fatigue crack propagation threshold KW - Component assessment KW - Crack closure KW - Environmental effects KW - Testing parameters PY - 2022 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/55403 AN - OPUS4-55403 SN - 0142-1123 VL - 164 SP - 1 EP - 15 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany