DETECTING A SIGNIFICANT EVENT IN EXPERIMENTAL DATA AND USE OF SUCH FOR DETECTION OF ENGAGEMENT DURING A MECHANICAL TEST

摘要

A method of determining onset of a significant event, such as point of engagement, in experimental data (302, 402) such as data measured during indenter (100) or tensile/compression tests. The measured data (302, 402) is processed by differentiation (412, 518) and/or integration (414, 522) to generate a plurality of processed series (413, 415, 417, 512, 524, 532). The method includes setting an upper bound (806, 906) and a lower bound (808, 908) based on thresholds selected as multiples (424, 530) of a standard deviation (421, 528). The significant event (602, 810) is determined from one or both of the upper and lower bounds (806, 906, 808, 908). The method can include calculating an uncertainty (308, 408, 542) for the significant event determination (602, 810).