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COMPARISON OF MECHANICAL AND ELASTIC CHARACTERISTICS BETWEENSOLID WOOD AND LIGNOCELLULOSIC COMPOSITE

机译：实木和木质纤维素复合材料的力学和弹性特性比较

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A report by FAO (Food and Agriculture Organization of the United Nations) shows that the amount of wood of different species cut by sawmills in Europe in the year 2010 is about 125.36 million m3. So sawdust is an important renewable raw material and can be used in other areas moreover than heating. Wood combined with other materials has multiple benefits and utilities, becoming a subject of active research area, with new ideas that are to be examined and then developed. The paper presents experimental research on elastic properties of lignocellulosic composite with different sizes of grain and type of reinforced material (hemp and flax) determined with tensile test. A new material with a natural texture was made. Then, the results were compared with elastic properties of solid wood from references. The fracture behavior in case of weft direction of samples is brittle, while the warp direction is ductile due to successive ruptures of reinforcement elements. By adding wood particles between layers of fabric, the material anisotropy was improved resulting decreasing of longitudinal elasticity modulus on the warp direction of only 14.8%, compared to the longitudinal modulus of the material in the weft direction. By embedded the wood particles in gaps of fabrics, the compaction of the material increase and mechanical properties of the composites are improved. In this case breaking behavior for tensile test is brittle too.
机译：粮农组织（联合国粮食及农业组织）的一份报告显示，2010年欧洲锯木厂砍伐的不同树种的木材量约为1.2536亿立方米。因此，木屑是重要的可再生原料，除供暖外还可用于其他领域。木材与其他材料的结合具有多种益处和实用性，已成为活跃的研究领域，并提出了要研究和发展的新想法。本文通过拉伸试验确定了不同粒径和增强材料类型（麻和亚麻）的木质纤维素复合材料的弹性性能的实验研究。制作了具有自然纹理的新材料。然后，将结果与参考文献中的实木弹性性能进行比较。样品在纬向的情况下的断裂行为是脆性的，而由于增强元件的连续断裂，经向是延性的。通过在织物层之间添加木材颗粒，材料的各向异性得以改善，与材料在纬向的纵向模量相比，在经向的纵向弹性模量仅降低了14.8％。通过将木材颗粒嵌入到织物的缝隙中，材料的致密性增加，复合材料的机械性能得到改善。在这种情况下，拉伸试验的断裂行为也很脆。

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