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首页> 外文期刊>Industrial Crops and Products >Soy-based polyurethane spray foam insulations for light weight wall panels and their performances under monotonic and static cyclic shear forces
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Soy-based polyurethane spray foam insulations for light weight wall panels and their performances under monotonic and static cyclic shear forces

机译：用于轻质墙板的大豆基聚氨酯喷涂泡沫绝缘材料及其在单调和静态循环剪切力作用下的性能

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摘要

This work was dedicated to the investigation of the strengthening effects of soy-based rigid polyurethane (PU) foam cores, neat and composite foams containing wood fiber, on the performance of small-scale wooden wall panels under monotonic and static cyclic shear loads. Adding wood fiber resulted in a reduction in the density (23%) and compressive strength (63%) of the foam while specific tensile modulus, ratio of tensile modulus to density of foam, increased about 39%. Both monotonic and static cyclic shear tests showed that inclusion of the composite foam core increased the maximum strength of panels significantly. Panels containing composite foam cores had an average shear strength of 12.0 kN compared to 10.7 kN and 8.0 kN for panels with neat foam and empty panels, respectively. The results of this research demonstrated for the first time that, in addition to their thermal insulation capabilities, soy-based rigid PU foams significantly contribute to the shear strength of wooden wall panels. This characteristic is important especially in the construction of residential and low-rise commercial buildings. (C) 2015 Elsevier B.V. All rights reserved.
机译：这项工作致力于研究大豆基硬质聚氨酯（PU）泡沫芯，包含木纤维的纯泡沫和复合泡沫对单调和静态循环剪切载荷下小型木板墙的性能的增强作用。添加木纤维导致泡沫的密度（23％）和抗压强度（63％）降低，而比拉伸模量，拉伸模量与泡沫密度的比值增加约39％。单调和静态循环剪切试验均表明，复合泡沫芯的​​加入显着增加了面板的最大强度。包含复合泡沫芯的​​面板的平均剪切强度为12.0 kN，而带有纯泡沫和空面板的面板的平均剪切强度分别为10.7 kN和8.0 kN。这项研究的结果首次证明，除了具有隔热性能外，大豆基硬质PU泡沫还显着提高了木质墙板的剪切强度。该特性在住宅和低层商业建筑的建造中尤其重要。 （C）2015 Elsevier B.V.保留所有权利。

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