The mechanical behavior of the wood-bark interface of shrub willow was tested to investigate the influence of key factors: harvest season, moisture content, and cultivars. The mechanical properties enable the design and optimization of the performance of debarking equipment for short-rotation woody stems and can help improve understanding of the mechanical performance of the wood-bark interface. Results show that the low moisture content samples have a significantly higher shear modulus, G (Mean =0.34 GPa) and modulus of toughness $U_t$ (Mean = 12.84 kPa). However, the degree of ductility (0.02) and the ratio of ultimate strain ${\epsilon }_u$ to strain ${\epsilon }_{50}$ (2.18) are lower for low moisture content samples. Different willow cultivars have no significant influence on the mechanical properties of the wood-bark interface tested. Results also reveal that the values of ultimate strain ${\epsilon }_u$ (0.11), modulus of toughness $U_t$ (16.09 kPa), and degree of ductility (0.031) are significantly higher for samples collected in the dormant season compared to the growing season. Covariance analysis reveals that aspect ratio of the sample has a significant effect on shear modulus, G (p = 0.041), ultimate strain, ${\epsilon }_u$ (p = 0.008), modulus of toughness (p = 0.012) and degree of ductility (p = 0.001). Identifying the combination of these desirable properties provides a framework to achieve the maximum debarking efficiency and effectiveness for short-rotation woody crops.

测试了灌木柳木-树皮界面的机械行为，以研究关键因素的影响：收获季节，水分含量和品种。机械性能可以设计和优化用于短旋转木质茎的去皮设备的性能，并有助于增进对木-树皮界面机械性能的了解。结果表明，低水分含量的样品具有明显更高的剪切模量，G（均值= 0.34 GPa）和韧性模量${ü}_{Ť}$（平均值＝ 12.84kPa）。但是，延展度（0.02）和极限应变比${\epsilon }_{ü}$ 紧张 ${\epsilon }_{50}$（2.18）对于低水分含量样品较低。不同的柳树品种对测试的木-树皮界面的机械性能没有重大影响。结果还表明极限应变值${\epsilon }_{ü}$ （0.11），韧性模量 ${ü}_{Ť}$（16.09 kPa）和延展度（0.031）对于休眠季节收集的样品比生长季节要高得多。协方差分析表明，样品的纵横比对剪切模量G（p = 0.041），极限应变，${\epsilon }_{ü}$（p = 0.008），韧性模量（p = 0.012）和延展度（p = 0.001）。确定这些理想特性的组合可为实现短轮伐木本作物的最大去皮效率和有效性提供一个框架。