TY - JOUR A1 - Mair, Georg A1 - Scholz, Irene A1 - Schönfelder, Thorsten T1 - The residual strength of breathing air composite cylinders toward the end of their service life - a first assessment of a real-life sample N2 - Applications by fire brigades expose the composite cylinders to harsh temperature and handling conditions. Standards have been used for certifying composite cylinders, which are designed for transport of dangerous goods and do not reflect service conditions specific to fire brigades. In this paper, the residual safety of a design type (fully wrapped with aluminum and carbon fiber composite) at the end of their service life of 15 yrs is analyzed. One sample underwent hydraulic load cycle (LC) tests, another conventional burst tests, and the third slow burst tests (SBTs). The statistical evaluation and the handling of an unexpected high amount of early failures are shown. KW - Composite cylinders KW - End of life KW - Slow burst test KW - Residual strength KW - Sample testing KW - Probabilistic KW - Distribution function PY - 2016 DO - https://doi.org/10.1115/1.4033878 SN - 0094-9930 SN - 1528-8978 VL - 138 IS - 6 SP - PVT-15-1030, 1 EP - 9 PB - American Society of Mechanical Engineers CY - New York, NY AN - OPUS4-33157 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -