Fig. 10From: Unique characteristics of residual stress distribution of large-diameter keyaki (Zelkova serrata) logs and examination of their measurement methodRelationship between the change point (y) and the value of initial L/D ratio (x) and the comparison with the thresholds of previous researches [36,37,38,39]. Initial L/D was calculated as half of the plank length divided by log diameterBack to article page