Most of the current material testing procedures and standards have been designed at a time when
camera-based full-field measurements were not available and only point-wise sensors could be used,
like extensometers or strain gauges. As a consequence, such test configurations rely on simple strain
fields (uniform, linear) that can easily be approached with such point sensors, and statically
determinate stress solutions to obtain local stress information from global load-cell readings. While
such tests are easy to analyse, they rely on strong assumptions on boundary conditions and specimen
homogeneity, and are poor in contents, leading to the need for numerous test configurations to be used
to calibrate complex constitutive models
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