Virtual characterization of MDF fiber network
Virtual characterization of MDF fiber network
复制标题
MDF光纤网络的虚拟表征
DOI：
10.1007/s00107-016-1075-5
复制
发表时间：
2017
影响因子：
2.6
通讯作者：
B. Plinke
中科院分区：
文献类型：
--
作者：
J. Šliseris;H. Andrä;M. Kabel;B. Dix;B. Plinke
提出了一种中密度纤维板虚拟设计方法，以优化中密度纤维板的纤维取向和铺层方式。新方法通过使用纤维网络的微观结构模型来估计刚度和强度。采用虚拟设计方法改进了多层定向纤维结构层板的制造工艺。对不同纤维几何形状、胶含量和分布的纤维微结构的力学行为的实验研究是复杂的、耗时的和昂贵的。另一方面，虚拟微结构设计允许开发一种新的木纤维基材料与更少的实验工作。微观结构模型有助于更好地理解木材纤维网络的非线性损伤力学行为取决于纤维的几何参数。微观尺度上的裂纹分布和纤维变形等参数的实验测量是复杂的，但可以使用计算机模拟建模。虚拟设计工具需要较少的经验数据。该模型考虑了平均木纤维取向，纤维直径，纤维长度和木纤维细胞壁和胶的力学性能的信息。采用无取向纤维的标准平行四边形模型，对平行四边形微结构强度和刚度分析的数值方法进行了标定。结果表明，该方法对取向纤维甚至多层结构的热膨胀都能给出精确的结果。该虚拟微结构设计工具可以显著提高和加快木材等木纤维基复合材料的优化制造技术。
A virtual design method for medium density fiberboards (MDF) is proposed with the aim to optimize the fiber orientation and lay-up of MDF. The new method estimates the stiffness and strength by using microstructure models of the MDF fiber network. The virtual design is used to improve the manufacturing technology of MDF plates with multilayer oriented fiber structure. Experimental investigations of the mechanical behavior of MDF microstructure for various fiber geometries, glue content and distribution are complicated, time consuming and expensive. On the other side, virtual microstructure design allows to develop a new wood fiber based material with less experimental work. Microstructure models help to better understand the non-linear damage mechanical behavior of a wood fiber network depending on fiber geometrical parameters. Such parameters as crack distribution and fiber deformation on micro-scale level are complicated to experimentally measure, but possible to model using computer simulations. The virtual design tool requires less empirical data. The model takes into account information on average wood fiber orientation, fiber diameter, fiber length and mechanical properties of wood fiber cell wall and glue. The numerical method for strength and stiffness analysis of MDF microstructure was calibrated using standard MDF with non-oriented fibers. It turned out that this method gives precise results for MDF with oriented fibers and even with multilayer structure. The proposed virtual microstructure design tool can significantly improve and speed-up the optimization manufacturing technology of MDF and other wood fiber based composites.
影响因子：
3.3
作者：
D. Somer;D. Peric;E. A. S. Neto;W. Dettmer
通讯作者：
D. Somer;D. Peric;E. A. S. Neto;W. Dettmer