Weibull analysis for the diameter dependence of the elastic modulus of curaua fibers

Monteiro, S. N.; Lopes, Felipe Perissé Duarte; Ferreira, Ailton Silva

doi:10.1590/s1517-70762013000100007

Cited by 5 publications

(4 citation statements)

References 18 publications

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“…This fact indicates that the thinner periquiteira fibers present greater stiffness than the thicker fibers, suggesting that the fibers of smaller diameters have more compact fibril bundles. The inverse correlation of stiffness with diameter can be attributed to the fiber microstructure and also to the random rupture of microfibrils [66][67][68][69]. Similar behavior was observed by Zakikhani et al [70] when studying the mechanical properties of bamboo fibers.…”

Section: Tensile Testssupporting

confidence: 70%

Periquiteira (Cochlospermum orinocense): A Promising Amazon Fiber for Application in Composite Materials

et al. 2023

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Natural lignocellulosic fibers (NLFs) have in recent decades appeared as sustainable reinforcement alternatives to replace synthetic fibers in polymer composite material applications. In this work, for the first time, the periquiteira (Cochlospermum orinocense), a lesser known NLF from the Amazon region, was analyzed for its density and, by X-ray diffraction (XRD), to calculate the crystallinity index as well as the microfibrillar angle (MFA), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron analysis (SEM) and tensile strength. The apparent density found for the periquiteira fiber was 0.43 g/cm3, one of the NLF’s lowest. XRD analysis indicated a crystallinity index of 70.49% and MFA of 7.32°. The TGA disclosed thermal stability up to 250 °C. The FTIR analysis indicated the presence of functional groups characteristic of NLFs. The SEM morphological analysis revealed that the periquiteira fiber presents fine bundles of fibrils and a rough surface throughout its entire length. The average strength value of the periquiteira fiber was found as 178 MPa. These preliminary results indicate that the periquiteira fiber has the potential to be used as a reinforcing agent in polymeric matrices and can generate a lightweight composite with excellent mechanical properties that can be used in various industrial sectors.

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Section: Tensile Testssupporting

confidence: 70%

Periquiteira (Cochlospermum orinocense): A Promising Amazon Fiber for Application in Composite Materials

et al. 2023

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“…e stress-strain curves of LDPE/ CSW/PE-g-MAH composites are shown in Figure 1, and other mechanical properties are shown in Table 2. e tensile strength, elastic modulus, and elongation at break of the material correspond to their strength, stiffness, and toughness [33][34][35]. Figure 1 shows that, after adding CSW, the strength and stiffness are improved.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH

Zhang

Yang

et al. 2019

Journal of Analytical Methods in Chemistry

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In order to improve the strength and resistance of ordinary nonel tubes, calcium sulfate whiskers (CSW, treated with silane coupling agent) and maleic anhydride grafted polyethylene (PE-g-MAH) are used to control the wall material of the nonel tube that the blending of the low-density polyethylene was enhanced. The effects of mass fraction of CSW or PE-g-MAH on the tensile properties, interfacial structure, melting and crystallization characteristics, and thermal decomposition behavior of the composite system were studied, and the thermal decomposition kinetics were calculated. The results show that, relative to pure LDPE, the strength of LDPE/CSW (85/15) is increased by 7.58%, and the strength of LDPE/CSW/PE-g-MAH (84/15/1) is increased by 7.58%. The addition of CSW or PE-g-MAH has gradually changed the fracture mode of the LDPE matrix. Thermal analysis shows that CSW can reduce the crystallinity of LDPE. The melting and crystallization characteristics of LDPE/CSW/PE-g-MAH composites have little effect, but the thermal decomposition stability is improved. The kinetic analysis showed that the reaction order (n) was around 1, CSW could improve LDPE/CSW thermal decomposition activation energy, and PE-g-MAH increased the thermal decomposition activation energy of LDPE/CSW/PE-g-MAH.

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“…The Weibull a parameter for WBFs falls within the values for flax (1.64-2.14) 72 and curaua fiber (1.59-2.23). 70 The lower Weibull shape parameters for WBFs and BFs indicate a larger variability in the modulus than the synthetic fibers as a much higher value was recorded for Nextel 312 (4.6) and Nextel 610 (10.5). 73 The reliability analysis for the elastic modulus of WBFs using Weibull distribution is presented in Figure 11 and Figure 13, and is determined by plotting the probability of survival and experimental elastic modulus.…”

Section: Weibull Analysis Of Elastic Modulus Of Wbfs At Different Rh ...mentioning

confidence: 91%

“…The 11% RH R 2 value for canola fiber is equal to the R 2 0.05 . Furthermore, in order for data to follow the Weibull distribution, the Weibull shape parameter should be greater than 0.5 70 and all the shape parameter data are higher than this threshold value (Table 2), which is discussed further in the following section. Therefore, it was determined that the tensile properties come from the Weibull distribution.…”

Section: Weibull Analysis Of Tensile Strength Of Wbfs At Different Rh...mentioning

confidence: 99%

Probabilistic model for cattail and canola fibers: effect of environmental conditions, structural parameters, fiber length, and estimators

Shadhin

Mann

Rahman

2022

Textile Research Journal

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Biomass fibers are being widely investigated for industrial applications as an alternative to synthetic fibers using a standard humidity condition. In this study, the mechanical properties of two waste biomass fibers – canola and cattail – have been investigated when subjected to different environmental conditions, fiber length, and type of estimators used during analysis. The effect of different environmental conditions and structural variations were investigated by measuring the tensile properties after exposing them to eight different relative humidity conditions using a fixed fiber length of 25 mm. Further investigation was conducted using fiber lengths of 25, 35 and 45 mm using the most conservative relative humidity condition. The data were analyzed by a Weibull distribution model using four different estimators. The results revealed that Weibull strength ( σavg) and modulus (Eavg) closely followed experimental values for cattail and canola fibers. The different relative humidity conditions and fiber lengths resulted in different Weibull parameters with 11% relative humidity and the mean rank estimator predicted the most conservative tensile strength for both waste biomass fibers. The experimental and characteristic Weibull strength decreased when fiber gauge length increased from 25 to 45 mm. The tensile strength and modulus of both waste biomass fibers at 50% reliability lie within the range of average experimental values. However, these values are reduced to 155 MPa (strength) and 20 GPa (modulus) for cattail fiber at 90% reliability. The survival probability of the tensile strength and modulus were found to be the highest at 75% and 100% relative humidity for cattail and canola fibers, respectively.

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Weibull analysis for the diameter dependence of the elastic modulus of curaua fibers

Cited by 5 publications

References 18 publications

Periquiteira (Cochlospermum orinocense): A Promising Amazon Fiber for Application in Composite Materials

Periquiteira (Cochlospermum orinocense): A Promising Amazon Fiber for Application in Composite Materials

Study on Blending of Wall Material of the Nonel Tube by CSW/PE-g-MAH

Probabilistic model for cattail and canola fibers: effect of environmental conditions, structural parameters, fiber length, and estimators

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