Dog-bone Samples may not Provide Direct Access to the Longitudinal Tensile Strength of Clear-wood

Fig. (6) Distribution of the Tsai-Wu FI in a Norway spruce clear-wood dog-bone sample (−60 ≤ x ≤ 20, y ≥ 0) hypothetically breaking in gauge region evaluated according to FE analysis. Black mark highlights the position of the maximal FI ≈ 1.05.