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Contactless measurement of Longitudinal & Transversal strain at a tensile test

The RTSS Videoextensometer can measure the longitudinal and transversal strain with one camera. The longitudinal strain is measured through the line marker and the specimen width is measured throught the specimen border. It is possible to measure the transversal strain as an average value between the longitudinal marker (--> Posson number) or as a minumum width (necking --> R/N value).

The video shows a slow tensile test with the RTSS system measuring longitudinal and transversal strain.