Numerical analysis of progressive damage in nonwoven fibrous networks under tension

Farukh, Farukh; Demirci, Emrah; Sabuncuoğlu, Barış; Acar, Memiş; Pourdeyhimi, Behnam; Silberschmidt, Vadim V.

doi:10.1016/j.ijsolstr.2014.01.015

Cited by 48 publications

(38 citation statements)

References 31 publications

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“…Kästner et al [22] performed uniaxial tensile, relaxation and cyclic experiments to quantify parameters of inelastic behaviour of polypropylene that were subsequently used to formulate constituent equations for implementation in numerical modelling. A parametric numerical code was developed to model fibrous networks [23] based on their realistic microstructure and several models were implemented employing this code, incorporating elastic, plastic and viscous properties of constituent fibres obtained from tests [24][25][26]. The randomness of the microstructure was introduced into the models in terms of the orientation distribution function (ODF) for fibres.…”

Section: Introductionmentioning

confidence: 99%

Inelastic behaviour of bacterial cellulose hydrogel: In aqua cyclic tests

et al. 2015

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Citation: GAO, X. et al., 2015. Inelastic behaviour of bacterial cellulose hydrogel: in aqua cyclic tests. Polymer Testing, 44, Additional Information:• This paper was accepted for publication in the journal Poly- AbstractHydrogels are finding an increasingly broad use, especially in biomedical applications. Their complex structure -a low-density network of microfibrils -defines their non-trivial mechanical behaviour. The focus of this work is on test-based quantification of mechanical behaviour of a bacterial cellulose (BC) hydrogel exposed to cyclic loading. Specimens for the tests were produced using Gluconacetobacter xylinus ATCC 53582 and tested in aqua under uniaxial cyclic loading conditions in a displacement-controlled regime. Substantial microstructural changes were observed in the process of deformation. A combination of qualitative microstructural observations with quantitative force-displacement relations allowed identification of main deformation mechanisms, confirming inelastic behaviour of BC hydrogel under a loading-unloading-reloading regime. Elastic deformation was accompanied by non-elastic (viscoplastic) deformation in both tension and compression. This study also aims to establish a background for micromechanical modelling of overall properties of BC hydrogels.

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Section: Introductionmentioning

confidence: 99%

Inelastic behaviour of bacterial cellulose hydrogel: In aqua cyclic tests

et al. 2015

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“…Apparently, in the process of stretching, one of the main microstructural changes induced in the fibrous network is re-orientation of fibres towards the direction of deformation; this process was observed in various networks (see e.g. [45]). …”

Section: Statistics Of Fibre Orientationmentioning

confidence: 99%

Assessing stiffness of nanofibres in bacterial cellulose hydrogels: Numerical-experimental framework

Gao

Sozumert

Shi

et al. 2017

Materials Science and Engineering: C

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This work presents a numerical-experimental framework for assessment of stiffness of nanofibres in a fibrous hy-drogel -bacterial cellulose (BC) hydrogel -based on a combination of in-aqua mechanical testing, microstructur-al analysis and finite-element (FE) modelling. Fibrous hydrogels attracted growing interest as potential replacements to some tissues. To assess their applicability, a comprehensive understanding of their mechanical response under relevant conditions is desirable; a lack of such knowledge is mainly due to changes at microscale caused by deformation that are hard to evaluate in-situ because of the dimensions of nanofibres and aqueous en-vironment. So, discontinuous FE simulations could provide a feasible solution; thus, properties of nanofibres could be characterised with a good accuracy. An alternative -direct tests with commercial testing systems -is cumbersome at best. Hence, in this work, a numerical-experimental framework with advantages of convenience and relative easiness in implementation is suggested to determine the stiffness of BC nanofibres. The obtained magnitudes of 53.7-64.9 GPa were assessed by calibrating modelling results with the original experimental data.

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“…fibre slip, fibre failure and bond breakage). A finiteelement method has been used to study various aspects of mechanical behaviour of nonwoven materials such as axial stress-strain behaviour including elastic stiffness under monotonic loading (Hou et al, 2009: Silberstein et al 2012, mechanical performance under complex loading histories including out-of-plane loading Demirci et al2013), a notch-sensitive behaviour (Ridruejo et al 2010), mechanisms involved in deformation and damage (Farukh et al 2014) as well as effects of manufacturing parameters on mechanical performance of nonwovens materials (Sabuncuoglu et al, 2012). However, most of the studies were focussed on a particular aspect of mechanical behaviour of nonwovens while fully or partially neglecting others.…”

Section: Introductionmentioning

confidence: 99%

Nonwovens modelling: a review of finite-element strategies

Farukh

Demirci

Ali

et al. 2015

The Journal of The Textile Institute

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This paper reviews the main strategies used to simulate the mechanical behaviour of nonwoven materials that is defined by a structure of their fibrous networks and a mechanical behaviour of constituent fibres or filaments. The main parameters influencing the network structure of nonwoven materials are discussed in the first part. The second part deals with two main strategies employed in the analysis of mechanical behaviour of nonwoven materials using finiteelement models based on continuous and discontinuous techniques. Both strategies have further sub-types, which are critically reviewed, and future trends in this area of research are discussed. Key WordsNonwovens, mechanical properties, thermal bonding, finite-element modelling NONWOVENS MODELLING: A REVIEW OF FINITE-ELEMENT STRATEGIES AbstractThis paper reviews the main strategies used to simulate the mechanical behaviour of nonwoven materials that is defined by a structure of their fibrous networks and a mechanical behaviour of constituent fibres or filaments. The main parameters influencing the network structure of nonwoven materials are discussed in the first part. The second part deals with two main strategies employed in the analysis of mechanical behaviour of nonwoven materials using finiteelement models based on continuous and discontinuous techniques. Both strategies have further sub-types, which are critically reviewed, and future trends in this area of research are discussed.

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Numerical analysis of progressive damage in nonwoven fibrous networks under tension

Cited by 48 publications

References 31 publications

Inelastic behaviour of bacterial cellulose hydrogel: In aqua cyclic tests

Inelastic behaviour of bacterial cellulose hydrogel: In aqua cyclic tests

Assessing stiffness of nanofibres in bacterial cellulose hydrogels: Numerical-experimental framework

Nonwovens modelling: a review of finite-element strategies

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