Compressive Plastic Working of Woody Materials

1.木质材料压缩塑性加工装置的研制，该加工装置由1)塑化装置、2)挤压装置、3)模板固定装置组成。这些设备是在1995年购买的，目前工作正常，没有重大问题。使用该设备进行的研究是将日本雪松的方形木材在开水中加热后压缩到原来体积的三分之一。为了固定模板，在将材料加热到180Cﾟ之前，我们使用了一种方法来密封材料的两端。2.压缩木材材料的强度评估。我们评估了用所述装置变形的压缩雪松的强度，通过拉伸和弯曲试验。弯曲强度与压缩率成正比，三分之一压缩木材的抗弯强度是未压缩木材的2.5倍。压缩材料的强度没有表现出3倍的原因是因为材料的纤维是Destro…更多的是对压缩工作的关注。压缩木材的比强度是铝材的2倍，钢材的4倍，可以认为压缩木材是一种值得作为轻质建筑材料使用的材料。3.形状修复实验。我们对压缩木材材料进行了形状修复实验，形状固定材料通过开水等物质重新加热恢复了形状。实验进行了10次，将压缩的材料放入100Cﾟ的开水中10分钟，然后从水中取出。结果表明，压缩速率越高，复原率越低。4.定形过程中加热/降温曲线的优化。对于压缩后的木材，定形必须在180℃ﾟ、10-atms的压力下加热10分钟，然后冷却。5.压缩木材生产中的尺寸效应。我们比较了实验室实验水平上使用的小试块和长度不超过2米的大试块的尺寸效应。结果表明，用小的实验碎片进行的实验结果与实际生产大小没有基本差异。较少

1.Development of a compressive plastic working device for wood materials.The working device consists of 1), plasticization device, 2), press device, 3), form fixation device. These devices where bought in 1995 and are working without major problems at the present time. The research done with the device were on compressing square timbers of Japanese cedar to one third of its original volume after heating the material in boiled water. To fix the form we used a method of sealing the both ends of the material before heating it to 180Cﾟ.2.Strength evaluation of compressed wood materials.We evaluate the strength of the compressed cedar, deformed with the mentioned device, trough tensile and bend test. The bending strength came out to be proportionately with the compression rate, which the one-third compressed wood showed 2.5 times stronger than the uncompressed one. The reason that the strength of the compressed material did not show 3 times was because the fibers of the material were destro … More yed at the compressive working. Figuring out that the compressed wood's specific strength is 2 times larger than that of the Aluminum and 4 times larger than that of the steel, we can consider that compressed woods are worthy of use as lightweight construction material.3.Form restoration expeiment.We made experiment of the form restoration of the compressed wood material, which the form fixed material restored its form by being reheated with substances like boiled water. The experiment was done 10 times by putting the compressed material into boiled water at 100 Cﾟ for 10 minutes and taking out from it. The results showed that for higher compressing rate, lower restoration rate could be got.4.Optimization of the heating/cooling curve at form fixing process.For form fixing of a compressed wood, it has to be heated at 180Cﾟ, at a pressure of 10-atms for 10 minutes and then cooled. We could know that the cooling curve affects the form fixing performance.5.Size effect at compressed wood production.We compared the size effect between small test fragments used at laboratory experiment level and large test fragments with length up to 2 meters. The results showed no basic differences between the results of the experiment done with the small experiment fragment and actual productive size. Less