Figure 4. Shapes of strain gage chains. a) direction of measurement grid is parallel with longitudinal axis of chain, b) direction of measurement grid is perpendicular to longitudinal axis of chain, c) direction of measurement grid is oriented parallel or perpendicular to longitudinal axis of chain, d) measurement grids are in groups with three and angles 0°/60°/120° with respect to longitudinal axis of chain [8]

From

Possibility of Using of Tensometry in Deformation Analysis in Areas With Sudden Change of Geometry

Miroslav Pástor, František Trebuňa, Pavol Lengvarský, Jozef Bocko

American Journal of Mechanical Engineering. 2016, 4(7), 363-367 doi:10.12691/ajme-4-7-23