Evaluation of measurement method for plastic strain ratio of metal sheet

After the revision of ISO 10113:2020, its content had been greatly adjusted compared with that before the revision, the semi-automatic measurement method had been added, and the manual measurement, semi-automatic measurement and automatic measurement were more clearly defined. The influence of different types of transverse extensometers on the plastic strain ratio of different specimens was verified by automatic measurement method. The results show that the repeatability of measurement results could be improved by using multi-point transverse measurement method for different types of metal materials.