Micro–macro constitutive modeling and finite element analytical-based formulations for fibrous materials: A multiscale structural approach for crimped fibers

Marino, Michele; Wriggers, Peter

doi:10.1016/j.cma.2018.10.016

Cited by 13 publications

(14 citation statements)

References 35 publications

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“…The constitutive model parameters can be found in Table 2 and coincide with those used in previous investigations to predict the impact behaviour of the nonwoven fabric [27,31,32]. [23,41] and it is also a conventional approach to study nonwoven materials [6,26,31,36]. The impactor was modelled as a rigid sphere of 5.5 mm in diameter, density 7.85 g/cm 3…”

Section: Constitutive Model Of Nonwoven Fabricsmentioning

confidence: 98%

Multiscale numerical optimisation of hybrid metal/nonwoven shields for ballistic protection

Vila-Ortega

Ridruejo

Martínez-Hergueta

2020

International Journal of Impact Engineering

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This research presents a detailed numerical study of the ballistic performance of lightweight hybrid metal/nonwoven shields for automotive applications. Several configurations, including different number of nonwoven fabrics, were analysed to find the optimal design. Impact response of the nonwoven fabric was predicted by a multiscale numerical constitutive model able to capture its complex deformation and failure mechanisms: fibre straightening, realignment and disentanglement. Special attention was paid to the interaction between layers for different air gaps in the final energy absorption capacity of the shield, and detailed analysis of the different sequences of triggered failure modes was provided. The hybrid shield outperformed the previous configurations, resulting in an absorption capacity about twice the sum of the energies dissipated by the steel plates and the nonwovens individually. Furthermore, the hybrid shield increased the energy absorption capacity of the baseline steel plates by a factor over 8, with an almost negligible increment of areal weight of 5.5%, giving the possibility to improve the ballistic performance of conventional automotive components without penalising the fuel consumption of the vehicle.

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Section: Constitutive Model Of Nonwoven Fabricsmentioning

confidence: 98%

Multiscale numerical optimisation of hybrid metal/nonwoven shields for ballistic protection

Vila-Ortega

Ridruejo

Martínez-Hergueta

2020

International Journal of Impact Engineering

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“…Till now, the research about nylon is mainly limited to the engineering mechanical properties, such as elongation at break or twist, but lacks the discussion on 3D fine structure and constitutive model of nylon. Currently, the research on mesoscopic structure of 3D fabric can provide useful reference 10 – 12 , focusing on three aspects: (1) Different simplified fine structures are adopted, such as: conformal finite element mesh 13 , multielement digital chain 14 , discrete element method 15 and structure genome 16 ; (2) Direct detection methods such as micro-CT 17 (Fig. 3 ) and X-ray tomography 11 are used to determine the real geometric model of 3D composite reinforced materials, and mesoscopic finite element simulation is used to acquire the mechanical properties and air permeability of composite materials; (3) Based on the mechanics of monofilaments continuum 18 and the characterization of mesoscopic mechanics of volume elements 19 , a constitutive model based on the principle of multi-scale structure is established to reflect the microstructure changes of three-dimensional textile composites.…”

Section: Introductionmentioning

confidence: 99%

Investigation on CT characterization of pore structure in nylon-uncured rubber composite from a microscopic view

Chi

Han

et al. 2021

Sci Rep

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In order to construct the geometric models characterizing the real micro pore-fracture structures of nylon-uncured rubber composite, and further compare the distribution law in the pore-fracture of solid (nylon)-gas (pore) two-phases with that of solid (nylon)-viscoelastic body (rubber)-gas (pore) three-phases composite, in this paper, the X-ray three-dimensional (3D) microscope is applied for the nylon material and nylon-rubber composite respectively. By employing the 3D visualization software (Avizo), three-dimensional reconstruction and pore-fracture network model is realized, where the quantitative statistics and comparative analysis are carried out. The results demonstrate that the pore/throat number of nylon material accounting for 20.8%/33.9% are the largest when the pore/throat radius is in the range of 3–4 μm/1–2 μm, respectively, however, the pore/throat number of nylon-rubber composite with the radius 3–4 μm/1–2 μm occupies merely 5.49%/11.3%. Furthermore, the average pore radius of nylon material is believed as larger than that of nylon-rubber composite based on the pore network model, where the pore/throat surface area and pore/throat volume have perfect consistent patterns with that of pore radius. This work will offer a theoretical basis for the investigation of gas seepage capability discrepancy between the solid (nylon) one-phase and solid (nylon)-viscoelastic body (rubber) two-phases.

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“…Equally, multiscale homogenization approaches consider an independent deformation behaviour within the RVE, but its volume-averaged response must be compatible with the macroscopic deformation, e.g. [11,52,41,38]. In contrast, if elastic relative fibre-matrix deformation is to be considered which is governed by the stationarity principle of the total energy with no prior explicit assumptions on the constituents' relative motion, e.g.…”

Section: Introductionmentioning

confidence: 99%

Local micromorphic non-affine anisotropy for materials incorporating elastically bonded fibers

Skatulla¹,

Sansour²,

Limbert³

2021

Preprint

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There has been increasing experimental evidence of non-affine elastic deformation mechanisms in biological soft tissues. These observations call for novel constitutive models which are able to describe the dominant underlying micro-structural kinematics aspects, in particular relative motion characteristics of different phases. This paper proposes a flexible and modular framework based on a micromorphic continuum encompassing matrix and fiber phases. It features in addition to the displacement field so-called director fields which can independently deform and intrinsically carry orientational information. Accordingly, the fibrous constituents can be naturally associated with the micromorphic directors and their non-affine motion within the bulk material can be efficiently captured. Furthermore, constitutive relations can be formulated based on kinematics quantities specifically linked to the material response of the matrix, the fibres and their mutual interactions. Associated stress quantities are naturally derived from a micromorphic variational principle featuring dedicated governing equations for displacement and director

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Micro–macro constitutive modeling and finite element analytical-based formulations for fibrous materials: A multiscale structural approach for crimped fibers

Cited by 13 publications

References 35 publications

Multiscale numerical optimisation of hybrid metal/nonwoven shields for ballistic protection

Multiscale numerical optimisation of hybrid metal/nonwoven shields for ballistic protection

Investigation on CT characterization of pore structure in nylon-uncured rubber composite from a microscopic view

Local micromorphic non-affine anisotropy for materials incorporating elastically bonded fibers

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