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Analysis of Crack Expansion and Morphology of Cross-Laminated Timber Planar Shear Test

Yujie Huang1, Yifan Zhang1, Zheng Wang1,*, Assima Dauletbe2, Yao Lu1, Zhaoyu Shen1

1 College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, 210037, China
2 College of Civil Engineering, Nanjing Forestry University, Nanjing, 210037, China

* Corresponding Author: Zheng Wang. Email: email

(This article belongs to the Special Issue: Advanced Wood Composites from Renewable Materials)

Journal of Renewable Materials 2022, 10(3), 849-870. https://doi.org/10.32604/jrm.2022.018515

Abstract

To describe the dynamic cracking process of the CLT vertical layer, the correlation between a load-displacement curve, specimen cracking, and planar shear failure mechanism of the CLT were explored. A three-point bending test and an improved planar shear test are used to evaluate the shear performance of the CLT. In this study, the load-displacement curve is recorded, the experimental part is synchronized with the video, the dynamic process of cracking of the vertical layer is observed and analyzed throughout the test. From the load-displacement curve, the image characteristics of the initial cracking and the sudden increase of the cracking of the specimen are summarized. The description results of the whole dynamic process of the CLT vertical layer cracking are analyzed by planar shear strength value, cracking phenomenon, and azimuth angle of cracking surface. The main conclusions show that the three-point bending test and the improved plain shear test can be used to test the plain shear strength of the CLT, with a difference of only 5.7%. The original crack and the new crack expansion account for 18.9% and 81.1% of the main cracking surface, respectively. And the vertical layer of the CLT specimen under three-point bending has three cracking morphologies, such as radial shake, ring shake, neither along with the radial shake nor along with the ring shake. The azimuth angle of the cracking surface of the CLT vertical layer under planar shear is quite consistent with the first main plane azimuth of the vertical layer of the CLT specimens under the three-point bending test and the shearing test. The shape in the cracking direction of the left half-span or the right half-span of the vertical layer of the specimen is similar to the Chinese character eight.

Graphic Abstract

Analysis of Crack Expansion and Morphology of Cross-Laminated Timber Planar Shear Test

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APA Style
Huang, Y., Zhang, Y., Wang, Z., Dauletbe, A., Lu, Y. et al. (2022). Analysis of crack expansion and morphology of cross-laminated timber planar shear test. Journal of Renewable Materials, 10(3), 849-870. https://doi.org/10.32604/jrm.2022.018515
Vancouver Style
Huang Y, Zhang Y, Wang Z, Dauletbe A, Lu Y, Shen Z. Analysis of crack expansion and morphology of cross-laminated timber planar shear test. J Renew Mater. 2022;10(3):849-870 https://doi.org/10.32604/jrm.2022.018515
IEEE Style
Y. Huang, Y. Zhang, Z. Wang, A. Dauletbe, Y. Lu, and Z. Shen, “Analysis of Crack Expansion and Morphology of Cross-Laminated Timber Planar Shear Test,” J. Renew. Mater., vol. 10, no. 3, pp. 849-870, 2022. https://doi.org/10.32604/jrm.2022.018515

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cc Copyright © 2022 The Author(s). Published by Tech Science Press.
This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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