Fig. 3
Typical experimental stress-strain curve from micro-bending tests. Three preliminary elastic cycles (not represented here) were performed in order to measure the elastic Young modulus (E). The strain was then increased until 0.8% in order to generate tissue damage. One final cycle was performed to characterise the damage. Edamaged stands for the longitudinal elastic modulus after damage (0.8% strain). Damage was characterised by the relative decrease of the elastic modulus according to Eq. 7. MOR stands for the fresh wood modulus of rupture