Microscopic computed tomography aided finite element modelling as a methodology to estimate hygroexpansion coefficients of wood: a case study on opposite and compression wood in softwood branches

IF 2.2 3区农林科学 Q2 FORESTRY

Holzforschung Pub Date : 2023-08-31 DOI:10.1515/hf-2023-0014

S. Florisson, M. Hartwig, M. Wohlert, E. Gamstedt

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引用次数: 1

Abstract

Abstract Microscopic X-ray computed tomography (XµCT) aided finite element (FE) modelling is a popular method in material science to relate material properties to heterogeneous microstructures. Recently, a methodology was developed for the XµCT aided FE modelling of wood, which characterises the process from specimen preparation to estimation of material properties. In the current research, this methodology is tested on branches of Norway spruce (Picea abies (L.) Karst.) to estimate the hygroexpansion coefficients of opposite (OW) and compression wood (CW). These properties are largely unknown and have engineering implications. The study is complemented by measurements of density, moisture content (MC) and elastic moduli. Results showed that the methodology assisted in the design of an integrated process and the identification of bottlenecks. It was seen that the level of detail of the numerical model had a strong influence on the obtained hygroexpansion properties. CW from branches showed higher density and longitudinal shrinkage coefficients, and elastic moduli less affected by MC. These differences are unlikely caused by MC, but more likely by the characteristics of the microstructure.

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微观计算机断层扫描辅助有限元建模作为一种方法来估计木材的湿膨胀系数:对软木枝上的对生和压缩木材的案例研究

微观X射线计算机断层扫描(XµCT)辅助有限元(FE)建模是材料科学中将材料性能与非均相微观结构联系起来的一种流行方法。最近，开发了一种用于XµCT辅助木材有限元建模的方法，该方法描述了从试样制备到材料性能估计的过程。在目前的研究中，这种方法在挪威云杉(Picea abies (L.))的分支上进行了测试。)来估算对生木(OW)和压缩木(CW)的湿膨胀系数。这些特性在很大程度上是未知的，具有工程意义。该研究是由密度，水分含量(MC)和弹性模量的测量补充。结果表明，该方法有助于设计集成过程和识别瓶颈。可以看出，数值模型的细节水平对所得的水膨胀特性有很大的影响。枝状连续枝的密度和纵向收缩系数较高，弹性模量受MC的影响较小，这些差异不太可能是MC造成的，而更可能是由微观结构特征造成的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Holzforschung 工程技术-材料科学：纸与木材

CiteScore

4.60

自引率

4.20%

发文量

审稿时长

3.3 months

期刊介绍： Holzforschung is an international scholarly journal that publishes cutting-edge research on the biology, chemistry, physics and technology of wood and wood components. High quality papers about biotechnology and tree genetics are also welcome. Rated year after year as one of the top scientific journals in the category of Pulp and Paper (ISI Journal Citation Index), Holzforschung represents innovative, high quality basic and applied research. The German title reflects the journal''s origins in a long scientific tradition, but all articles are published in English to stimulate and promote cooperation between experts all over the world. Ahead-of-print publishing ensures fastest possible knowledge transfer.