Single fiber pull-out test of regenerated cellulose fibers in polypropylene: An energetic evaluation

Zarges, Jan-Christoph; Kaufhold, C.; Feldmann, Markus; Heim, Hans-Peter

doi:10.1016/j.compositesa.2017.10.030

Cited by 42 publications

(17 citation statements)

References 31 publications

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“…The highest pull-out force was obtained with GF(a)-PUR matrix. Moreover, the pull-out force required for PETF with a PUR matrix was higher, with about 21.3 N, than PETF with a PDMS matrix with approximately 8.7 N. However, in terms of the GF bundles, the results show that the removal of the silane-based surface treatment of the GF increased the pull-out force to about 45.6 N. A possible reason for this could be (i) the incompatible sizing provided by the supplier or (ii) the presence of rougher surface conditions [11,25] induced by the piranha acid treaded GF bundles, which was applied to remove the silane-based treatment from the manufacturer. Moreover, all reported measurements for GF show generally higher deviations in contrast to the results with PETF.…”

Section: Fiber Bundle Pull-out Testmentioning

confidence: 88%

“…In terms of the various test setups, the FBPO test offers the opportunity to perform experiments faster, more easily, and more economically compared to single fiber measuring devices, which need more careful handling [22] and special test equipment [4]. Besides that, the tests are influenced by the following factors: e.g., (i) the complex stress distribution in a fiber bundle [13,23], (ii) fiber-fiber interaction [24] with more real failure modes [23], or (iii) the presence of statistically distributed filaments inside the fiber bundle [25,26]. These points have a significant effect on the interlaminar shear strength due to the variable cross-section areas of the fiber bundle [4].…”

Section: Introductionmentioning

confidence: 99%

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Comparison and Impact of Different Fiber Debond Techniques on Fiber Reinforced Flexible Composites

et al. 2020

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The focus of this paper is the realization and verification of a modified fiber bundle pull-out test setup to estimate the adhesion properties between threads and elastic matrix materials with a more realistic failure mode than single fiber debond techniques. This testing device including a modified specimen holder provides the basis for an adequate estimation of the interlaminar adhesion of fiber bundles including the opportunity of a faster, easier, and more economic handling compared to single fiber tests. The verification was done with the single-fiber and microbond test. Overall, the modified test setup showed the typical pull-out behavior, and the relative comparability between different test scales is given.

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Section: Fiber Bundle Pull-out Testmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Comparison and Impact of Different Fiber Debond Techniques on Fiber Reinforced Flexible Composites

et al. 2020

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“…Com relação ao efeito do par fibra/matriz sobre a tensão cisalhante interfacial, de acordo com ZARGES et al [13], a remoção da fibra da matriz circundante é realizada quando a carga necessária para o desacoplamento em estado estacionário é menor que a resistência máxima da fibra. Assim, para cada par fibra/matriz existe uma carga correspondente para que o desacoplamento da fibra ocorra.…”

Section: Ensaio De Arrancamento (Pullout Test)unclassified

“…Para a interpretação das propriedades mecânicas de um compósito, a caracterização da adesão entre a fibra/matriz é de especial importância. Para a análise de compósitos convencionais, como compósitos refor-çados com fibra de vidro ou carbono, alguns ensaios estão disponíveis, sendo o de arrancamento (pullout test) um dos mais aplicados para determinar a tensão necessária para quebrar a interface fibra/matriz do compósito [3,[12][13][14][15][16]. Segundo MONTEIRO e D'ALMEIDA [16], os ensaios de arrancamento visam determinar o comprimento crítico da fibra (lc), e a tensão cisalhante interfacial (τ), associada à transferência de esforços entre a fibra e a matriz de um compósito.…”

Section: Introductionunclassified

Desenvolvimento de compósitos poliméricos reforçados com fibra da folha do buriti

Pereira¹,

Ceron²,

Silva³

et al. 2021

Matéria (Rio J.)

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RESUMO O objetivo desta pesquisa foi estudar a viabilidade, com relação à resistência à tração, da utilização da folha de buriti como reforço em compósitos com fibras contínuas unidirecionais em matriz polimérica. Como matriz, foram utilizadas as resinas de poliéster isoftálico, de poliéster ortoftálico e de epóxi. Analisou-se a resistência à tração da fibra, das resinas e dos compósitos confeccionados com cada polímero. Testes de arrancamento foram realizados para verificar a adesão da fibra nas resinas usadas como matriz. Foi feita uma caracterização da fibra através de microscopia óptica e com microscópio eletrônico de varredura (MEV), além da determinação de sua densidade. Quanto à estrutura, observou-se que as fibras possuem uma lacuna central entre as faces adaxial e abaxial e que há um enrolamento da fibra. Os ensaios de arrancamento mostraram que houve maior adesão entre a fibra da folha de buriti e a matriz de epóxi, com um comprimento crítico lc = 1,0 mm, seguido pela matriz de poliéster isoftálico, com lc = 2,8 mm, e pela matriz de poliéster ortoftálico, com lc = 26,8 mm. A fibra apresentou resistência à tração variando entre 100,8 MPa e 224,1 MPa. Verificou-se que a resistência à tração das fibras é maior para diâmetros menores. Entre as resinas estudadas, a de epóxi foi a que apresentou maior resistência média à tração (60,5 MPa), seguido pela de poliéster isoftálico (34,5 MPa) e pela de poliéster ortoftálico (27,7 MPa). Testes com os compósitos criados mostraram que a matriz de epóxi é a mais promissora quanto à resistência à tração, seguida pela matriz de poliéster isoftálico. A matriz de poliéster ortoftálico apresentou valores de resistência bem abaixo da demais. Conclui-se que a fibra da folha de buriti apresentou um bom potencial para a produção de compósitos leves e resistentes.

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“…Regarding the different test devices, FBPO testing generally provides the potential to conduct measurements faster, easier and with less complexity to estimate the fiber–matrix adhesion with more realistic failure modes (e.g., statistical fiber distribution or fiber–fiber interaction) than the single fiber tests, which, however, require more sensitive handling [ 8 , 14 ] as well as expensive special test equipment [ 28 , 29 ]. In addition, the FBPO tests are significantly influenced by several factors such as (i) the complex stress distribution in a fiber bundle [ 21 , 30 ], (ii) fiber–fiber interaction [ 29 ] with more real failure modes [ 14 , 31 ] or (iii) the presence of statistically distributed filaments inside the fiber bundle [ 32 , 33 ]. Due to the variable cross-section areas inside a fiber bundle, these aspects influence the interlaminar shear strength [ 19 , 34 ], and, therefore, the results can be considered more reliable for performance predictions on laminate lay-ups [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Tailored Interfaces in Fiber-Reinforced Elastomers: A Surface Treatment Study on Optimized Load Coupling via the Modified Fiber Bundle Debond Technique

et al. 2020

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The interface between the reinforcement and surrounding matrix in a fibrous composite is decisive and critical for maintaining component performance, durability, and mechanical structure properties for load coupling assessment, especially for highly flexible composite materials. The clear trend towards tailored solutions reveals that an in-depth knowledge on surface treating methods to enhance the fiber–matrix interfacial interaction and adhesion properties for an optimized load transfer needs to be ensured. This research aims to quantify the effect of several surface treatments for glass fibers applied in endless fiber-reinforced elastomers with pronounced high deformations. Due to this, the glass fiber surface is directly modified with selected sizings, using a wet chemical treatment, and characterized according to chemical and mechanical aspects. For this purpose, the interfacial adhesion performance between fibers and the surrounding matrix material is investigated by a modified fiber pull-out device. The results clearly show that an optimized surface treatment improves the interface strength and chemical bonding significantly. The fiber pull-out test confirms that an optimized fiber–matrix interface can be enhanced up to 85% compared to standard surface modifications, which distinctly provides the basis of enhanced performances on the component level. These findings were validated by chemical analysis methods and corresponding optical damage analysis.

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Single fiber pull-out test of regenerated cellulose fibers in polypropylene: An energetic evaluation

Cited by 42 publications

References 31 publications

Comparison and Impact of Different Fiber Debond Techniques on Fiber Reinforced Flexible Composites

Comparison and Impact of Different Fiber Debond Techniques on Fiber Reinforced Flexible Composites

Desenvolvimento de compósitos poliméricos reforçados com fibra da folha do buriti

Tailored Interfaces in Fiber-Reinforced Elastomers: A Surface Treatment Study on Optimized Load Coupling via the Modified Fiber Bundle Debond Technique

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