Optimizing bending strength of laminated bamboo using confined bamboo with softwoods

IF 1.9 4区材料科学 Q3 Materials Science

Science and Engineering of Composite Materials Pub Date : 2023-01-01 DOI:10.1515/secm-2022-0215

A. Cruz, C. Takeuchi

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Abstract

Abstract The objective of the study was to improve the stiffness and bending strength of laminated bamboo through confinement with softwood. A total of 144 beams were tested, divided into 6 groups of 24 specimens each. The tests were conducted on specimens of laminated bamboo, wood, and composite sections with different levels of confined bamboo laminate (20, 40, 60, and 80%). The results indicated that the composite exhibited optimal behavior when the ratio of bamboo to wood was between 46 and 54%. Furthermore, the composite demonstrated a bending modulus of elasticity that was 16.6% higher and a modulus of rupture that was 18.3% higher than the values predicted by the mixing rule. A mathematical model was developed to predict the design mechanical properties based on composite thickness. This model was validated through 18 additional bending tests. This new material is an environmentally sustainable alternative that has the potential to be used as beams in buildings, providing improved mechanical performance, reduced weight, and lower manufacturing cost compared to bamboo laminates.

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用软木约束竹材优化复合竹材的抗弯强度

摘要本研究旨在通过软木约束提高竹材复合材料的刚度和抗弯强度。试验共144根梁，分为6组，每组24根试件。试验采用不同限制竹层压水平(20%、40%、60%和80%)的竹层压、木材层压和复合材料截面试件进行。结果表明，竹材比为46 ~ 54%时，复合材料性能最佳。此外，复合材料的弯曲弹性模量比混合规则预测的值高16.6%，断裂模量高18.3%。建立了基于复合材料厚度的设计力学性能预测数学模型。该模型通过18个额外的弯曲试验进行了验证。与竹层压板相比，这种新材料是一种环境可持续的替代品，具有用作建筑物梁的潜力，提供更好的机械性能，减轻重量，降低制造成本。

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来源期刊

Science and Engineering of Composite Materials 工程技术-材料科学：复合

CiteScore

3.10

自引率

5.30%

发文量

审稿时长

4 months

期刊介绍： Science and Engineering of Composite Materials is a quarterly publication which provides a forum for discussion of all aspects related to the structure and performance under simulated and actual service conditions of composites. The publication covers a variety of subjects, such as macro and micro and nano structure of materials, their mechanics and nanomechanics, the interphase, physical and chemical aging, fatigue, environmental interactions, and process modeling. The interdisciplinary character of the subject as well as the possible development and use of composites for novel and specific applications receives special attention.