Micromechanical modelling of the progressive failure in unidirectional composites reinforced with bamboo fibres

Wang, Fang; Li, Xue; Zhang, Junqian; Li, Lü; Keer, Leon M.

doi:10.1016/j.mechmat.2015.12.006

Cited by 24 publications

(25 citation statements)

References 46 publications

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“…It is seen that the composites filled with different fiber volume generally display a noncatastrophic fracture failure, the characteristic of which represents a linear behavior at very low strain, followed by an irregular curve showing a nonlinear behavior with increasing strain up to rupture of the material. Indeed, it could be attributed to the formation and accumulation of some damages like as interfacial slipping . Also, it is explained by the alignment of macromolecules from the view of physical nature .…”

Section: Resultsmentioning

confidence: 99%

“…Afterwards, the samples were cooled for 8 h maintaining the present pressure before removing from the mold. Finally, the composite plate was cut into many rectangular coupons with the required dimensions with length of 150 mm, width of 20 mm, and thickness of 2 mm by using a dedicated cutting machine with a diamond‐coated cutting blade . In this work, configuration is limited to unidirectional lamina with a ply angle of 0°, and the length of continuous BF equals to that of specimen, that is, 150 mm.…”

Section: Methodsmentioning

confidence: 99%

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Effect of fiber volume fraction on the thermal and mechanical behavior of polylactide‐based composites incorporating bamboo fibers

Wang

Yang

Zhou

et al. 2017

J of Applied Polymer Sci

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Biodegradable composites reinforced with natural fibers are emerging as advanced materials in structural applications. In this work, green biocomposites are fabricated using hot pressing molding technique, polylactic acid selected as a matrix. The samples are prepared with different fiber volume fractions (30%, 40%, and 50%). Tensile tests are conducted on the specimens to investigate the composite mechanical behavior, and the influences of fiber content on the morphological and thermomechanical properties are evaluated using scanning electron microscopy, differential scanning calorimetry, and thermogravimetric analysis. There are higher tensile modulus and lower elongation at break for composites with increasing fiber content, respectively. Much variation in the tensile strength is observed when the fiber content is varied, which could be attributed to fiber agglomerations that affect the dispersion of fibers in the matrix, as evidenced by fracture surfaces. Thermal tests demonstrate that the increment of fiber content enhances the glass transition temperature and crystallization temperature of composites. Besides, a comparative analysis of the composites is performed, and the properties of the treated fiber composites are found to be improved compared to those from untreated fibers. Detailed analysis confirms the possibility of the addition of bamboo fibers to a biodegradable matrix for a specific application. V C 2017Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46148.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Effect of fiber volume fraction on the thermal and mechanical behavior of polylactide‐based composites incorporating bamboo fibers

Wang

Yang

Zhou

et al. 2017

J of Applied Polymer Sci

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“…Once the fiber was fixed, the mechanism was mounted at a speed of 0.36mm/sec, and the applied force was recorded. From the transverse area measured by SEM, the average tensile strength of the guadua fibers was obtained [24,25].…”

Section: Atomic Force Microscopymentioning

confidence: 99%

Mechanical and physical characterization of Guadua angustifolia‘Kunth’fibers from Colombia

Espitia¹,

Dios²,

Sjogreen³

et al. 2018

revuin

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Fibers of natural origin have been implemented as reinforcement materials in different areas; hence, it is important to know their properties. In this paper, the results of the physical, chemical, and mechanical characterization of natural fibers of guadua are shown; to achieve this, scanning electron microscopy (SEM), atomic force microscopy (AFM), moisture absorption, apparent density and fiber stress tests were used. The aim was to analyze the general behavior of guadua fibers and to determine their viability as reinforcement in composite materials for construction. From the characterization, it was determined that guadua has an excellent tensile strength and can be used as reinforcement in polymer matrices because of its roughness; that is, it has adhesion, it is light, and it has excellent absorption in comparison to other fibers. ResumenFibras de origen natural se han implementado como material de refuerzo en distintas áreas; por ello la importancia de conocer sus propiedades. En este trabajo se muestran los resultados de la caracterización física, química y mecánica de fibras naturales de guadua; para lograrlo, se emplearon técnicas de Microscopía Electrónica de Barrido (SEM),

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“…Their strengths are found to be ten times stronger than traditional wood . Thus, composites with bamboo fiber reinforcements are emerging as realistic materials in the structural community because of their advantages such as low cost, acceptable specific properties, weather resistant, dimensional stability, and biodegradability over conventional composites . Mandal et al performed a comparative study on the mechanical properties of glass/bamboo fiber reinforced composites .…”

Section: Introductionmentioning

confidence: 99%

Changes in the morphological–mechanical properties and thermal stability of bamboo fibers during the processing of alkaline treatment

Wang

Zhou

et al. 2017

Polymer Composites

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The aim of this study is to perform an intensive investigation of the influence of alkali concentrations on the microstructure and thermomechanical properties of bamboo fibers. The fibers were alkalized with 1, 4, and 7 wt% NaOH solution at room temperature for 1 h, respectively, and then they were examined by using scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, X‐ray diffraction, and tensile tests. The changes in morphology and chemical composition demonstrate that hemicellulose and lignin are likely removed by the alkalization with high concentration of NaOH. Compared with untreated fibers, there is an improvement in the average tensile strength of the fibers with the use of alkali treatment at 4 wt% concentration, which can be attributed to the formation of an effective contact area available for superior bonding with the matrix after treatment, whereas higher concentration used in the treatment induces a decrease of tensile strength. The analysis indicates that the elimination of binding materials with alkali treatment by higher concentration leading to partial removal of cellulose may be responsible for such changes. It is further verified by thermogravimetric analysis and X‐ray diffraction that the increase of alkali concentration helps facilitate an improvement of thermal stability. The overall results suggest that an appropriate alkali treatment is a key technology for enhancing the properties of natural fibers. POLYM. COMPOS., 39:E1421–E1428, 2018. © 2017 Society of Plastics Engineers

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Micromechanical modelling of the progressive failure in unidirectional composites reinforced with bamboo fibres

Cited by 24 publications

References 46 publications

Effect of fiber volume fraction on the thermal and mechanical behavior of polylactide‐based composites incorporating bamboo fibers

Effect of fiber volume fraction on the thermal and mechanical behavior of polylactide‐based composites incorporating bamboo fibers

Mechanical and physical characterization of Guadua angustifolia‘Kunth’fibers from Colombia

Changes in the morphological–mechanical properties and thermal stability of bamboo fibers during the processing of alkaline treatment

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