The elastic stress field arising in the single-fiber pull-out test

Marotzke, Christian

doi:10.1016/0266-3538(94)90027-2

Cited by 53 publications

(14 citation statements)

References 21 publications

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“…Similar observations were made by LópezManchado et al (2003) and Stamboulis et al (1999) for flax fiber composites. The explanation is the strong stress field heterogeneity of natural fibers at the fiber entry and the fiber end, which is called as "end effect" and which depends strongly on the fiber embedded length (Marotzke 1993(Marotzke , 1994Herrera and Brought to you by | EP Ipswich Authenticated Download Date | 10/9/14 6:39 AM Valadez 2005). The relation between IFSS and the ratio of embedded length to the fiber diameter is also illustrated in Figure 4b.…”

Section: Typical Displacement-load Curve Of the Pull-out Testmentioning

confidence: 98%

Pull-out method for direct measuring the interfacial shear strength between short plant fibers and thermoplastic polymer composites (TPC)

Wang¹,

Tian²,

Wang³

et al. 2013

Holzforschung

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Thermoplastic polymer composites reinforced with short plant fiber are worldwide in focus of research activities. Interfacial shear strength (IFSS) is an important indicator for evaluating the bonding quality between the fiber and the matrix polymer. However, the direct measurement of IFSS is especially difficult in the case of short fibers. In the present article, a method is proposed to this purpose, which is related to the known "fiber pulling out" methodology. In the case of single bamboo fibers, the IFSS in a polypropylene (PP) matrix was on, an average, of 5 MPa, which can be considered as weak. Scanning electron microscopy images revealed a rough inner surface in PP cavities left after fiber pulling out. This is direct evidence that a mechanical interlocking mechanism is active in the interphase between the hydrophilic fibers and the hydrophobic matrix.

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Section: Typical Displacement-load Curve Of the Pull-out Testmentioning

confidence: 98%

Pull-out method for direct measuring the interfacial shear strength between short plant fibers and thermoplastic polymer composites (TPC)

Wang¹,

Tian²,

Wang³

et al. 2013

Holzforschung

View full text Add to dashboard Cite

show abstract

“…In the case of an ideal elastic fibre and matrix properties and a brittle interface fracture, strong stress field inhomogeneities are appeared at the fibre entry as well as at the fibre end. Their quantities depend strongly on the embedded length of the fibre and influence both the crack initiation and propagation at stress loading 7,13,14) . Consequently, the apparent shear stress calculated using Eq.…”

Section: Introductionmentioning

confidence: 99%

Interfacial characterisation of flax fibre-thermoplastic polymer composites by the pull-out test

Stamboulis¹,

Baillie

Schulz

1999

Angew. Makromol. Chem.

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The interface between flax fibres and thermoplastic polymer matrices has been investigated. Two types of flax fibres have been used: dew retted and upgraded Duralin fibres. The latter fibres have been treated by a novel treatment process for improved moisture and rot sensitivity. The apparent shear strength of dew‐retted and upgraded Duralin fibres embedded in high and low density polyethylene, polypropylene and maleic anhydride modified polypropylene, respectively, has been calculated from the maximum force measured from the pull‐out test using the Kelly‐Tyson equation. Higher apparent shear strength values have been measured in the case of high density polyethylene. An improvement in the interfacial shear strength by the use of upgraded flax fibres has not been clearly observed. The curves of pull‐out force versus displacement for all samples are typical of a brittle fracture mixed mode interface behaviour. The pull‐out test of flax fibre‐polymer matrices exhibit similar characteristics with the pull‐out test of synthetic fibre‐polymer systems.

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“…The failure process in these composites involves fracture failure along the fibre surfaces, with pull-out for short fibres and fracture for longer fibres. Their quantities depend strongly on the embedded length of the fibre and influence both the crack initiation and propagation at stress loading 7,13,14) . The advantage of this test is that the debonding force can be plotted as a function of embedded length.…”

Section: Introductionmentioning

confidence: 99%

Interfacial characterisation of flax fibre-thermoplastic polymer composites by the pull-out test

Stamboulis¹,

Baillie

Schulz

1999

Angew. Makromol. Chem.

View full text Add to dashboard Cite

The interface between flax fibres and thermoplastic polymer matrices has been investigated. Two types of flax fibres have been used: dew retted and upgraded Duralin fibres. The latter fibres have been treated by a novel treatment process for improved moisture and rot sensitivity. The apparent shear strength of dew-retted and upgraded Duralin fibres embedded in high and low density polyethylene, polypropylene and maleic anhydride modified polypropylene, respectively, has been calculated from the maximum force measured from the pull-out test using the Kelly-Tyson equation. Higher apparent shear strength values have been measured in the case of high density polyethylene. An improvement in the interfacial shear strength by the use of upgraded flax fibres has not been clearly observed. The curves of pull-out force versus displacement for all samples are typical of a brittle fracture mixed mode interface behaviour. The pull-out test of flax fibrepolymer matrices exhibit similar characteristics with the pull-out test of synthetic fibre-polymer systems.

show abstract

The elastic stress field arising in the single-fiber pull-out test

Cited by 53 publications

References 21 publications

Pull-out method for direct measuring the interfacial shear strength between short plant fibers and thermoplastic polymer composites (TPC)

Pull-out method for direct measuring the interfacial shear strength between short plant fibers and thermoplastic polymer composites (TPC)

Interfacial characterisation of flax fibre-thermoplastic polymer composites by the pull-out test

Interfacial characterisation of flax fibre-thermoplastic polymer composites by the pull-out test

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