TY - CONF A1 - Klingelhöffer, Hellmuth T1 - Demands for improvement of temperature stability of extensometers T2 - Proc. Eighth Int. Conf. on Low Cycle Fatigue (LCF8) N2 - Thermal fluctuations do exist at extensometers but they remain quite often unknown because the temperature of the extensometer is not measured, recorded and assessed in strain controlled tests. The temperature fluctuation leads to thermal expansion of the gauge length of the extensometer resulting in force fluctuations as a materials response of the material tested in a strain controlled test. The thermal expansion leads to an error of the strain range applied. A case study was conducted to calculate the strain range error when the strain range was varied as well as the thermal fluctuation of the extensometer. The most important outcome of the study is that the strain range error can exceed the allowed limits if the thermal fluctuation of the extensometer is too high. Sources of thermal fluctuation of the extensometer were analyzed and identified. Suggestions are given to reduce the thermal fluctuation of the extensometer. T2 - LCF8 CY - Dresden, Germany DA - 27.06.2017 KW - Accuracy KW - Strain error KW - Temperature fluctuation KW - Extensometer PY - 2017 SN - 978-3-9814516-5-8 SP - 227 EP - 232 PB - DVM CY - Berlin AN - OPUS4-40888 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -