Tensile behaviour of nonwoven structures: comparison with experimental results

Rawal, Amit; Priyadarshi, Apurv; Kumar, Narender; Lomov, Stepan Vladimirovitch; Verpoest, Ignace

doi:10.1007/s10853-010-4755-2

Cited by 22 publications

(34 citation statements)

References 21 publications

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“…This can effectively increase the tensile strength. The findings of the study by Rawal et al also confirmed the fiber contact theory, where tensile and compressive strengths depended on numbers of fibers that are in cohesion [13].…”

Section: Puncture Strength Of Filament-reinforced Geotextilessupporting

confidence: 61%

Applications of geotextiles made of PET-filament-based nonwoven fabrics

et al. 2016

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Climate change has been occuring in recent years. The extraordinary changes lead to high temperatures, floods, and typhoons that become a significant threat to people's lives and property. Therefore, engineering methods have become important, as they decrease the level of people's loss caused by natural disasters. Synthetic fibers have been commonly used in geotechnical engineering field since their invention, and are now widely available. Whether geotextiles are made using fabrics or nonwoven fabrics, water permeability and appropriate strength are their indispensable properties in reinforcement, separation, filtration, drainage, and protection. In this study, polyester (PET) filaments and nonwoven fabrics are combined using hot pressing, during which different weight amounts of filament are used. The composites are tested for delamination strength, tensile strength, tear strength, burst strength, and puncture strength to characterize the filament-based geotextiles. The experimental results show that a high needle punching depth has a negative influence on the strengths of geotextiles. Moreover, the geotextiles exhibit the optimal tensile and tearing strength when they are hot pressed at 170 o C, and optimal burst strength and puncture strength when they are hot pressed at 180 o C.

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Section: Puncture Strength Of Filament-reinforced Geotextilessupporting

confidence: 61%

Applications of geotextiles made of PET-filament-based nonwoven fabrics

et al. 2016

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“…Several studies based on experimental and numerical modelling related to deformation and fracture of nonwovens were performed with some of them focused on micromechanisms involved in these phenomena [11][12][13][14][15][16][17][18][19][20][21][22]. Moreover, most of the work in this area was related not to nonwoven fabrics but to paper [23][24][25][26], which is a very particular type of nonwoven.…”

Section: Introductionmentioning

confidence: 99%

Meso-scale deformation and damage in thermally bonded nonwovens

et al. 2012

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Abstract:Thermal bonding is the fastest and cheapest technique for manufacturing nonwovens. Understanding mechanical behaviour of these materials, especially related to damage, can aid in design of products containing nonwoven parts. A finite-element model incorporating mechanical properties related to damage such as maximum stress and strain at failure of fabric's fibres would be a powerful design and optimization tool. In this study, polypropylene-based thermally bonded nonwovens manufactured at optimal processing conditions were used as a model system. A damage behaviour of the nonwoven fabric is governed by its single-fibre properties, which are obtained by conducting tensile tests over a wide range of strain rates. The fibres for the tests were extracted from the nonwoven fabric in a way that a single bond point was attached at both ends of each fibre. Additionally, similar tests were performed on unprocessed fibres, which form the nonwoven. Those experiments not only provided insight into damage mechanisms of fibres in thermally bonded nonwovens but also demonstrated a significant drop in magnitudes of failure stress and respective strain in fibres due to the bonding process. A novel technique was introduced in this study to develop damage criteria based on the deformation and fracture behaviour of a single fibre in a thermally bonded nonwoven fabric. The damage behaviour of a fibrous network within the thermally bonded fabric was simulated with a finite-element model consisting of a number of fibres attached to two neighbouring bond points. Additionally, various arrangements of fibres' orientation and material properties were implemented in the model to analyse the respective effects.

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“…In contrast to knitted fabric and woven fabric, the random and discontinuous microstructure is the most characteristic features of a nonwoven fabric, which has an important effect on its tensile behaviour [1].…”

Section: Introductionmentioning

confidence: 99%

“…Due to the complex structure of nonwoven fabrics, a few researchers had used considerable efforts to understand the mechanical behaviour of the nonwoven fabric by applying the mechanical model. For example, Rawal et al [1] developed a micromechanical model by incorporating the effect of fibre orientation. Hou et al [2] investigated the effects of random and discontinuous microstructure of the nonwoven fabric on their mechanical properties by incorporating random discontinuous structures representing micro-structures of a real nonwoven material.…”

Section: Introductionmentioning

confidence: 99%

Finite Element Modelling for Tensile Behaviour of Thermally Bonded Nonwoven Fabric

Gao

Wang

2015

Autex Research Journal

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A nonwoven fabric has been widely used in geotextile engineering in recent years; its tensile strength is an important behaviour. Since the fibre distributions in nonwoven fabrics are random and discontinuous, the unit-cell model of a nonwoven fabric cannot be developed to simulate its tensile behaviour. This article presents our research on using finite element method (FEM) to study the tensile behaviour of a nonwoven fabric in macro-scale based on the classical laminate composite theory. The laminate orientation was considered with orientation distribution function of fibres, which has been obtained by analysing the data acquired from scanning electron microscopy with Hough Transform. The FE model of a nonwoven fabric was developed using ABAQUS software; the required engineering constants of a nonwoven fabric were obtained from experimental data. Finally, the nonwoven specimens were stretched along with machine direction and cross direction. The experimental stress-strain curves were compared with the results of FE simulations. The approximate agreement proves the validity of an FE model, which could be used to precisely simulate the stress relaxation, strain creep, bending and shear property of a nonwoven fabric.

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Tensile behaviour of nonwoven structures: comparison with experimental results

Cited by 22 publications

References 21 publications

Applications of geotextiles made of PET-filament-based nonwoven fabrics

Applications of geotextiles made of PET-filament-based nonwoven fabrics

Meso-scale deformation and damage in thermally bonded nonwovens

Finite Element Modelling for Tensile Behaviour of Thermally Bonded Nonwoven Fabric

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