A constitutive model for the in-plane mechanical behavior of nonwoven fabrics

Ridruejo, Álvaro; González, C.; LLorca, J.

doi:10.1016/j.ijsolstr.2012.04.014

Cited by 56 publications

(30 citation statements)

References 35 publications

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“…They are based on homogenization of fibrous networks and calculation of their mostly anisotropic properties that depend strongly on orientation distribution of fibres. More information regarding these models can be found elsewhere [34,35,36]. An amniotic fibrous microstructure was presented by a sparse network in [37], in which fibre interconnections (crosslinks) were randomly distributed ensuring no free fibres and crosslinks.…”

Section: Introductionmentioning

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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Section: Introductionmentioning

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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“…These two models are the Planas model (P model) [68], [69], and the Jearanaisilawong model (JS model) [70]. Both models rely on the concepts of an effective fiber stretch [61], and an orientation distribution weighted response.…”

Section: Models Consideredmentioning

confidence: 99%

“…These spurious effects are reduced by the introduction of the element characteristic length to the damage evolution law [80]. The form of the "fracture energy" ariable, , used in the present model is analogous to that used in Ridruejo [69], but with a variable, nonlinear modulus parameter that scales with the effective stretch ratio. since damage cannot physically be greater than 100%.…”

Section: Progressive Damage Modelmentioning

confidence: 99%

Large-displacement Lightweight Armor

Clough¹

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Large-displacement Lightweight ArmorRandomly entangled fibers forming loosely bound nonwoven structures are evaluated for use in lightweight armor applications. These materials sacrifice volumetric efficiency in order to realize a reduction in mass versus traditional armor materials, while maintaining equivalent ballistic performance. The primary material characterized, polyester fiberfill, is shown to have improved ballistic performance over control samples of monolithic polyester as well as 1095 steel sheets.The response of fiberfill is investigated at a variety of strain rates, from quasistatic to ballistic, under compression, tension, and shear deformation to elucidate mechanisms at work during ballistic defeat. Fiberfill's primary mechanisms during loading are fiber reorientation, fiber unfurling, and frictional sliding. Frictional sliding, coupled with high macroscopic strain to failure, is thought to be the source of the high specific ballistic performance in fiberfill materials.The proposed armor is tested for penetration resistance against spherical and cylindrical 7.62 mm projectiles fired from a gas gun. A constitutive model incorporating the relevant deformation mechanisms of texture evolution and progressive damage is developed and implemented in Abaqus explicit in order to expedite further research on ballistic nonwoven fabrics.v

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“…The final residual strength was provided by friction between bundles, which also led to an additional energy dissipation. Ridruejo et al (2012a) also characterized the mechanical behavior of a thermally bonded polypropylene nonwoven (Typar SF32 manufactured by Dupont). In this material, the fibers underwent plastic strains prior to bond failure, see The central feature governing the mechanical behavior of entangled networks is the formation of temporary contacts and entanglements between fibers.…”

Section: Mechanical Response Of Nonwovensmentioning

confidence: 99%

“…The structure and deformation of the fiber network follows the model developed by Ridruejo et al (2012a), which was successfully applied to simulate mechanical behavior of thermally-bonded polypropylene nonwoven fabrics (Ridruejo et al, 2012a,b). The model considers a mesodomain formed by a square planar region of arbitrary size containing a random network of long, curly, noninteracting fibers, Fig.…”

Section: Network Modelmentioning

confidence: 99%

Multiscale analysis of the mechanical behavior of needle-punched nonwoven fabrics

Hergueta¹

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A constitutive model for the in-plane mechanical behavior of nonwoven fabrics

Cited by 56 publications

References 35 publications

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

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

Large-displacement Lightweight Armor

Multiscale analysis of the mechanical behavior of needle-punched nonwoven fabrics

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