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Mechanical performance of glulam products made with Portuguese poplar
European Journal of Wood and Wood Products ( IF 2.6 ) Pub Date : 2020-07-16 , DOI: 10.1007/s00107-020-01569-y
Sandra R. S. Monteiro , Carlos Martins , Alfredo M. P. G. Dias , Helena Cruz

Due to its average mechanical properties, poplar, a fast-growing species, has been disfavored compared to stronger species for several decades. Wood-based products may help changing that perspective and thus, poplar has been gaining its market share for structural uses. A state-of-the-art review concerning the use of poplar to produce glued laminated products, with special focus on the use of Portuguese poplar, is presented. The Portuguese forest produces a great variety of species. The most common poplar species found in this country are Populus x canadensis, P. nigra L., and P. alba L. Despite its limited availability, and the market hesitation on its structural application, recent studies on poplar grown in the Portuguese forest showed its suitability for structural purposes. Glued laminated timber (GLT) beams made with this species revealed a very promising mechanical behavior. Bending strength tests evidenced a ductile behavior on more than 70% of the beams, which motivated deepening the study on the raw material used to produce those beams. To predict the mechanical behavior of such beams, a 3D numerical model was developed. The numerically predicted results were compared with the experimental ones, showing very good agreement between both approaches.



中文翻译:

用葡萄牙杨树制成的胶合木产品的机械性能

由于其平均的机械性能,几十年来,杨树(一种快速生长的树种)与强壮的树种相比一直不受欢迎。木质产品可能有助于改变这种观点,因此,白杨树已在结构用途方面获得了市场份额。本文介绍了有关使用杨树生产胶合层压制品的最新技术综述,其中重点是葡萄牙杨树的使用。葡萄牙森林生产各种各样的物种。在这个国家中最常见的杨树品种是杨x黄花欧洲黑杨属,和银白杨L.尽管供应有限,并且在结构应用方面市场犹豫,但最近对葡萄牙森林中种植的杨树的研究表明其适合结构用途。用这种树种制成的胶合层压木(GLT)梁显示出非常有前途的机械性能。弯曲强度测试证明了超过70%的梁具有延展性,这推动了对用于生产这些梁的原材料的研究的深入。为了预测此类梁的机械性能,开发了3D数值模型。将数值预测的结果与实验结果进行了比较,表明两种方法之间的一致性很好。

更新日期:2020-07-16
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