Relationship between piezoelectric behavior and the stress – strain curve of wood under combined compression and vibration stresses
Relationship between piezoelectric behavior and the stress – strain curve of wood under combined compression and vibration stresses
复制标题
压缩和振动联合应力下木材的压电行为与应力-应变曲线的关系
DOI：
10.1007/s10086-003-0590-2
复制
发表时间：
2004
影响因子：
2.9
通讯作者：
T. Nakao
中科院分区：
文献类型：
--
作者：
T. Nakai;M. Hamatake;T. Nakao
一般认为木材的压电效应是由细胞壁中的天然纤维素晶体引起的。然而，天然纤维素不能作为分子存在于木材中。纤维素的许多分子链与半纤维素和木质素形成成束的纤维结构，即微纤维。细胞壁可以被认为是这些微纤维的框架。因此，木材变形过程中压电电压的增加和减少源于细胞壁的动态变形。许多关于木材压电效应的研究都是考察木材小试样在微小载荷作用下的物理性质，但对木材变形的研究很少。1-3因此，我们研究了在与纤维方向和载荷方向成45度角的情况下受到压缩和振动应力的组合的试样，以澄清压电电压和变形之间的关系。本研究阐明了压电行为与应力-应变曲线初始形状之间的关系。
It is generally thought that the piezoelectric effect of wood results from natural cellulose crystals in the cell wall. However, natural cellulose cannot exist as a molecule in wood. Many molecular chains of cellulose form fiber structures in bundles with hemicellulose and lignin, ie, microfibrils. The cell wall can be considered as a frame for these microfibrils. Hence, the increase and decrease of the piezoelectric voltage during the deformation of wood originates from the dynamic deformation of the cell wall. Many studies of the piezoelectric effect in wood have examined the physical properties of small specimens of wood under a minute load, but there is very little research on deformation. 1–3 Therefore, we examined test specimens subjected to combined compression and vibration stresses at a 45-degree angle to the fiber direction and load direction, to clarify the relationship between the piezoelectric voltage and deformation. This study elucidated the relationship between piezoelectric behavior and the initial shape of the stress-strain curve.