Fig. 4
From: The impact of preload on 3-dimensional deformation parameters: principal strain, twist and torsion

Correlation between 3-dimensional principal and area strains. GPS: global principal strain; and GAS: global area strain
From: The impact of preload on 3-dimensional deformation parameters: principal strain, twist and torsion
Correlation between 3-dimensional principal and area strains. GPS: global principal strain; and GAS: global area strain