Assessment of physical, mechanical, and chemical properties of Dendrocalamus asper bamboo after application of wetting and drying cycles

Amaral, Leo Maia do; Rodrigues, Carlos; Poggiali, Flávia Spitale Jacques

doi:10.1016/j.bamboo.2022.100014

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…During the failure stage, all T-layers are completely fractured, and the specimen loses its load-bearing capacity completely. (2) In this study, the fiber tensile strength f t and fracture toughness K IC * of all specimens were obtained using a non-LEFM method, and a normal distribution analysis method was employed for fitting. The fracture parameters of glubam obtained during the softening stage P max are fiber tensile strength f t = µ f = 148.03 MPa and fracture toughness K IC * = µ k = 4.15 MPa √ m. At a 96% reliability level, all the data points of the entire experiment are covered, indicating that the predicted values based on the normal distribution are reliable.…”

Section: Discussionmentioning

confidence: 99%

“…Using the concept of equivalent crack, a 0 with different sizes can be transformed. a * ch is the characteristic crack length, which is related to the G and determines the gradual failure transition between the fiber tensile strength f t criterion and the fracture toughness K IC * criterion, namely, Equation (2). Since the fracture toughness in this paper is not obtained based on a linear stage, it is not a K IC in the strict sense of the term.…”

Section: Fracture Parameters Calculationmentioning

confidence: 99%

“…Bamboo is a natural fibrous composite that has excellent mechanical properties [1][2][3][4][5][6][7][8] and is commonly referred to as "plant bar" [9,10]. However, bamboo has some defects because of its hollow cross-section, fixed nodes, etc., which lead to limitations in its engineering applications [11].…”

Section: Introductionmentioning

confidence: 99%

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Study on the Quasi-Ductile Fracture Behavior of Glubam: The Role of Fiber Distribution

Jiang,

Liu

2024

Materials

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Cracking in fibrous composites is inevitable, and the fracture pattern is influenced by its fiber distribution. Bamboo fibrous composites have a distinct fiber distribution, which makes them an excellent material for studng the relationship between fiber distribution and fracture mode. Glued laminated bamboo is a bi-directional bamboo fibrous composite, which is called glubam for short. Its vertical thickness is about 28 mm, and the ratio of the number of longitudinal fiber layers to the number of transverse fiber layers is 4:1. This study conducted three-point bending fracture tests on single-edge notched specimens of glubam to investigate its mode-I fracture characteristics in the transverse vertical direction. The deformation curves show that the specimens still have the load-carrying capacity after reaching the maximum load, and the load shows a trend of step-like decrease, exhibiting a quasi-ductile fracture behavior. Overall, the fracture process can be divided into four stages, including linear, softening, quasi-ductile, and failure stages. In this study, based on certain assumptions, the prefabricated notch length a0 was adjusted according to the position of the transverse fibers. Subsequently, the non-linear elastic fracture mechanics method was employed to calculate the fracture parameters of glubam during the softening and quasi-ductile stages, including the fracture toughness KIC* and fiber tensile strength ft. The deviation of the fracture parameters between the two stages is within 10%, indicating that the correction of the a0 is correct. This indirectly proves that the staggered structure formed by longitudinal and transverse fibers is responsible for the quasi-toughness fracture of glubam. Finally, this study summarized and analyzed the quasi-ductile fracture behavior and found that materials or structures exhibiting quasi-ductile fracture behavior often possess a staggered structure. This staggered structure makes the crack in the form of semi-stable propagation, while the load decreases in a step-like manner.

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Section: Discussionmentioning

confidence: 99%

Section: Fracture Parameters Calculationmentioning

confidence: 99%

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Study on the Quasi-Ductile Fracture Behavior of Glubam: The Role of Fiber Distribution

Jiang,

Liu

2024

Materials

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“…There are several methods for measuring the density of bamboo fibers [ [41] , [42] , [43] , [44] ], nevertheless, there are two main methods: that of ISO 22157: 2019 the helium pycnometric method …”

Section: Methodsmentioning

confidence: 99%

Evaluation of the potential of Yushina alpina bamboo fibers from Cameroon for the manufacture of biocomposites

Ngouobe,

Lecompte,

Ngohe-Ekam

et al. 2024

Heliyon

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“…Bamboo is a fast-growing, inexpensive, and renewable natural material that has excellent yield, strength, and thermal insulation properties owing to its internal cavities [1][2][3][4]. During its growth, bamboo also absorbs large amounts of harmful carbon dioxide gas from the air and releases large amounts of oxygen.…”

Section: Introductionmentioning

confidence: 99%

Effects of surface modification methods on physical, mechanical, and microstructural properties of sustainable bamboo aggregate subjected to cementitious materials

Wei

Wang

et al. 2023

Preprint

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To alleviate the serious loss of gravel resources and improve the sustainability of concrete materials, this study innovatively proposes the development of a new type of bamboo aggregate from green and renewable Phyllostachys edulis (Moso) bamboo to replace traditional gravel aggregates. To realize the direct application of bamboo aggregates, this study proposes the use of epoxy mortar (EM) and polyurethane (PE) adhesives to modify the bamboo surface. Compared to unmodified and PE-modified bamboo, EM-modified bamboo showed significantly improved physical and mechanical properties. Durability tests revealed that the modified bamboo, especially EM-modified bamboo, was less affected by acidic and alkaline corrosion than the unmodified bamboo and the mass loss rate was almost zero. In the early stages of alkaline corrosion, the strength of the bamboo increased, and then began to decrease after 28 d. The removal of the outer green bamboo significantly improved the adhesion of the adhesive to the bamboo surface, as confirmed by pull-out tests. A sufficient bonding area between the EM-modified bamboo and the cement matrix remained after compression damage, whereas obvious debonding behavior between the cement matrix and unmodified and PE-modified bamboo was observed. In summary, EM modification significantly improved the comprehensive performance of bamboo aggregates. This study is expected to help improve the utilization rate of bamboo, promote bamboo concrete, reduce carbon emissions, and develop sustainable materials.

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Assessment of physical, mechanical, and chemical properties of Dendrocalamus asper bamboo after application of wetting and drying cycles

Cited by 12 publications

References 24 publications

Study on the Quasi-Ductile Fracture Behavior of Glubam: The Role of Fiber Distribution

Study on the Quasi-Ductile Fracture Behavior of Glubam: The Role of Fiber Distribution

Evaluation of the potential of Yushina alpina bamboo fibers from Cameroon for the manufacture of biocomposites

Effects of surface modification methods on physical, mechanical, and microstructural properties of sustainable bamboo aggregate subjected to cementitious materials

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