Publication: Synchronized Full Field Strain and Temperature measurements

Despite tension tests being a straightforward mechanical test, the material response is not necessarily simple and single values for stress and strain cannot fully represent the complexity of things that happen during these tests. In this work, IMPACT has integrated the use of high speed optical and infrared cameras to monitor how deformation and temperature develop in the whole specimen throughout high strain testing. The investigated materials for this research were four different steels with distinct deformation mechanisms. Data acquisition was synchronized in all systems by clocking and triggering the systems with a waveform generator and using an analog gate to only start data acquisition during the moment-of-interest. Digital Image Correlation (DIC) was used to evaluate the local strains in the sample and its displacement vector field was used so that the temperature maps could be represented in the same reference frame as the strain data. The results were presented in terms of 3D waterfall plots which are useful to compare the development of strain and temperature in the whole specimen and allow for an easier comparison with the different investigated steels. If you would like to know more about this work, the open access paper can be reached through this link: https://doi.org/10.1007/s40799-020-00436-y