Measurement of residual strains at stem periphery using the two-grooves method
Résumé
The two grooves method commonly used for measuring residual growth strains at tree stem surface has been analysed through finite elements simulations. The effect of groove depth and distance between gauge and groove are qualitatively similar to previously published experimental findings, but a strong effect of the stem radius can be observed. Simulations show that for too small groove depth and gauge length the residual strain value would be considerably underestimated. Further analysis should take better account of localised non-linear deformation processes.