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纤维偏差对薄桦木罗斯单板强度的影响。

Influence of Fiber Deviation on Strength of Thin Birch Roth Veneers.

作者信息

Pramreiter Maximilian, Bodner Sabine C, Keckes Jozef, Stadlmann Alexander, Kumpenza Cedou, Müller Ulrich

机构信息

Institute of Wood Technology and Renewable Materials, Department of Material Science and Process Engineering, University of Natural Resources and Life Sciences Vienna, Austria (BOKU), Konrad Lorenz Strasse 24, 3430 Tulln a.d. Donau, Austria.

Department of Materials Science, University Leoben, Jahnstrasse 12, 8700 Leoben, Austria.

出版信息

Materials (Basel). 2020 Mar 25;13(7):1484. doi: 10.3390/ma13071484.

DOI:10.3390/ma13071484
PMID:32218244
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7177803/
Abstract

The currently pursued implementation of wood into novel high performance applications such as automotive parts require knowledge about the material behaviour including ultimate strength. Previous research has shown that fiber deviation seems to be the dominating factor influencing the strength of thin veneers. This study aims to further investigate and quantify the influence of fiber deviation in two dimension and different hierarchical levels on the tensile strength of thin birch veneers. The fiber deviation in- and out-of-plane as well as the micro fibril angle were assessed by means of wide-angle X-ray scattering. Tensile strength was determined in laboratory experiments. Results show a high variability for in-plane fiber deviation mainly constituted by knots and other growth influencing factors. Pearson correlations between strength and fiber deviation ranged from -0.594 up to -0.852. Best correlation (r = -0.852) was achieved for maximum in-plane fiber deviation directly followed by a combined angle of in- and out-of-plane fiber deviation (r = -0.846). Based on the results it was shown that fiber deviation in- and out-of-plane is the dominating factor influencing ultimate tensile strength of thin birch veneers. Further research in regard to non-destructive strength prediction is necessary.

摘要

目前将木材应用于汽车零部件等新型高性能应用领域的实践，需要了解包括极限强度在内的材料性能。先前的研究表明，纤维偏差似乎是影响薄单板强度的主要因素。本研究旨在进一步探究并量化二维和不同层级水平下纤维偏差对薄桦木单板拉伸强度的影响。通过广角X射线散射评估面内和面外的纤维偏差以及微纤丝角。在实验室实验中测定拉伸强度。结果表明，面内纤维偏差具有很大的变异性，主要由节疤和其他生长影响因素构成。强度与纤维偏差之间的皮尔逊相关系数范围为-0.594至-0.852。最大面内纤维偏差的相关性最佳（r = -0.852），其次是面内和面外纤维偏差的组合角度（r = -0.846）。基于这些结果表明，面内和面外的纤维偏差是影响薄桦木单板极限拉伸强度的主要因素。有必要针对无损强度预测开展进一步研究。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/9b9f70439062/materials-13-01484-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/2735976f1a3c/materials-13-01484-g0A1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/d92fd5a195fe/materials-13-01484-g0A2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/fc312ead3ac5/materials-13-01484-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/527ef1db382a/materials-13-01484-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/7a654e2bbef5/materials-13-01484-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/4768bfb8166f/materials-13-01484-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/982d4819aebb/materials-13-01484-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/eb6062f33c47/materials-13-01484-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/9b9f70439062/materials-13-01484-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/2735976f1a3c/materials-13-01484-g0A1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/d92fd5a195fe/materials-13-01484-g0A2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/fc312ead3ac5/materials-13-01484-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/527ef1db382a/materials-13-01484-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/7a654e2bbef5/materials-13-01484-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/4768bfb8166f/materials-13-01484-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/982d4819aebb/materials-13-01484-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/eb6062f33c47/materials-13-01484-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/eeb2/7177803/9b9f70439062/materials-13-01484-g007.jpg

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