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Evaluation of the mechanical properties of different parts of bending bamboo culm by nanointendation

  • Xuehua Wang ORCID logo , Mingxin Cao , Jingwen Ma , Junjie Zhu , Caiping Lian , Benhua Fei , Wei Xu EMAIL logo and Fengbo Sun EMAIL logo
Published/Copyright: November 1, 2022
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Holzforschung
From the journal Holzforschung Volume 76 Issue 11-12

Abstract

Bamboo is a flexible natural material, which has high potential value. However, manufacturing processes for bent bamboo products are highly reliant on manual labor. The main challenge in the industrial processing of raw bamboo is that bamboo’s characteristics have not yet been extracted accurately. This mainly originates from bamboo’s complexity and its response to bending, which depends on chemical composition, structure, and properties of bamboo. In order to understand the response of bamboo to bending, samples from different parts of manual processed bent bamboo culm ring were studied through nanoindentation tests. In this regard, elastic modulus, hardness, irreversible work, and residual depth on different bamboo parts were analyzed. The results show that bending has different effects on the tension side (TS, the convex side) and compression side (CS, the concave side) of the bamboo culm. Moreover, the bending effect was different on the green (GBP) and middle bamboo parts (MBP). It was found that bending improved the elastic modulus of GBP in TS by 101%. Moreover, the hardness of GBP in TS decreased by 21% while that of MBP increased by 12.4%. In CS, the hardness of GBP increased by 10% while that of MBP decreased by 19%. The performed analyses reveal that the ratio of irreversible work to total work increased in the bent bamboo and the difference between GBP and MBP was not large for both TS and CS. The relative residual depth was about 60% for the neutral side (NS) and increased to above 70% in TS and CS. It was proposed that either TS or CS formed a respective complete tension-compression stress system in the bent bamboo specimen.

Keywords: bent bamboo; elastic modulus; hardness; tension-compression stress system; work loss
Corresponding authors: Wei Xu, College of Furnishings and Industrial Design, Nanjing Forestry University, 210037 Nanjing, China, E-mail: ; and Fengbo Sun, International Centre for Bamboo and Rattan, Beijing, China, E-mail:

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: 31800471

Acknowledgments

We thank Guangmin Suo from Suoshi Bamboo Industry Co. Ltd for providing the bamboo bent member.

  1. Author contributions: Conceptualization, Benhua Fei, Xuehua Wang; experimental operation, data curation, Mingxin Cao, Junjie Zhu, Jingwen Ma; funding acquisition, Fengbo Sun; writing – original draft, review & editing, Caiping Lian, Xuehua Wang.

  2. Research funding: This research was funded by National Natural Science Foundation of China, grant number 31800471.

  3. Conflict of interest statement: The funders had no role in the design of the study; in the collection, analyses, or interpretation of data; in the writing of the manuscript, or in the decision to publish the results. The authors declare that they have no conflicts of interest regarding this article.

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Received: 2022-05-15
Accepted: 2022-09-30
Published Online: 2022-11-01
Published in Print: 2022-12-16

© 2022 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Original Articles
  3. Intra-species variation in maximum moisture content, cell-wall density and porosity of hardwoods
  4. Fractal dimension of wood pores from pore size distribution
  5. Fatigue testing of wood up to one billion load cycles
  6. The influence of vacuum heat treatment on the pore structure of earlywood and latewood of larch
  7. The relationship between color and mechanical properties of heat-treated wood predicted based on support vector machines model
  8. Effect of water/moisture migration in wood preheated by hot press on sandwich compression formation
  9. Quercetin-grafted modification to improve wood decay resistance
  10. Organosolv delignification of birch wood (Betula pendula): DMSO/water pulping optimization
  11. Alkali lignin as a pH response bifunctional material with both adsorption and flocculation for wastewater treatment
  12. Evaluation of the mechanical properties of different parts of bending bamboo culm by nanointendation
https://doi.org/10.1515/hf-2022-0088
Keywords for this article
bent bamboo; elastic modulus; hardness; tension-compression stress system; work loss

Articles in the same Issue

  1. Frontmatter
  2. Original Articles
  3. Intra-species variation in maximum moisture content, cell-wall density and porosity of hardwoods
  4. Fractal dimension of wood pores from pore size distribution
  5. Fatigue testing of wood up to one billion load cycles
  6. The influence of vacuum heat treatment on the pore structure of earlywood and latewood of larch
  7. The relationship between color and mechanical properties of heat-treated wood predicted based on support vector machines model
  8. Effect of water/moisture migration in wood preheated by hot press on sandwich compression formation
  9. Quercetin-grafted modification to improve wood decay resistance
  10. Organosolv delignification of birch wood (Betula pendula): DMSO/water pulping optimization
  11. Alkali lignin as a pH response bifunctional material with both adsorption and flocculation for wastewater treatment
  12. Evaluation of the mechanical properties of different parts of bending bamboo culm by nanointendation
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