木材半切和桌形搭接节点的有限元建模及试验验证

IF 1.3 Q2 MATERIALS SCIENCE, PAPER & WOOD
Francesco Mirko Massaro, H. Stamatopoulos, Joacim Andersen, Eirik Brekke-Rasmussen
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引用次数: 1

摘要

木工接缝在现有木结构中非常常见,由于其高度可逆性,它们可能在当代结构中引起人们的注意。因此,可靠的木工接头有限元(FE)模型有助于评估其能力,并更好地了解影响其力学性能的参数。本文介绍了用Abaqus软件对木材半桌式搭接节点进行有限元分析,并给出了试验结果。有限元模型采用内聚带模型,考虑垂直于颗粒方向的剪切和拉伸联合破裂。对云杉实木试件进行了实验验证。样品是用数控机床构造的。为了进行比较,测试了两个手工制作的样本,结果显示其承载能力较低。有限元结果表明,初始间隙对容量有相当大的影响。对于某些假设的初始间隙,有限元模型可以预测其承载力,但低估了其变形。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Finite element modelling and experimental verification of timber halved and tabled scarf joints
ABSTRACT Carpentry joints are very common in existing timber structures and they may gain attention for contemporary structures, due to their high degree of reversibility. Therefore, reliable Finite Element (FE) models for carpentry joints can contribute to assessing their capacity and provide a better insight into the parameters influencing their mechanical properties. This paper presents a FE study (using Abaqus) of timber halved-and-tabled scarf joints, together with experimental results. The FE-model considers fracture due to combined shear and tension perpendicular-to-grain by using cohesive zone modelling. Experimental tests on spruce solid timber specimens were performed to validate the model. The specimens were constructed by the use of a CNC-machine. For comparative purposes, two handmade specimens were tested, resulting in a lower load capacity. The FE results showed that initial gaps have a considerable effect on capacity. For certain assumed initial gaps, the FE-model could predict the capacity, however, it underestimated the deformation.
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来源期刊
International Wood Products Journal
International Wood Products Journal MATERIALS SCIENCE, PAPER & WOOD-
CiteScore
2.40
自引率
0.00%
发文量
27
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