Fig. 5
Relationship between elastic modulus and failure strain at 25 and 80 °C in lateral tension. Circles, samples with the annual ring inclination of 0°; triangles, samples with the annual ring inclination of 45°; squares, samples with the annual ring inclination of 90°. R2 mean contribution ratio and error bars indicate 95% confidence interval. The symbols in round brackets beside R2 mean the symbols with linear regression