The mechanical behavior of porous metal fiber sintered sheets

Jin, Miao; Chen, Chang; Lu, Tianjian

doi:10.1016/j.jmps.2012.08.006

Cited by 54 publications

(21 citation statements)

References 51 publications

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“…At the fibre intersections, additional beam elements were inserted to model the cross-linkers whose density had a significant role in both the strength and the stiffness of the stochastic fibre network. The simulation results showed good agreement with the dimensional analysis and experimental data ( Jin et al, 2013 ).…”

Section: Introductionsupporting

confidence: 70%

Numerical analysis of shear stiffness of an entangled cross-linked fibrous material

Chatti

Michon

Poquillon

2020

International Journal of Solids and Structures

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To cite this version:Fadhel Chatti, Christophe Bouvet, Guilhem Michon, Dominique Poquillon. Numerical analysis of shear stiffness of an entangled cross-linked fibrous material. a b s t r a c tThe objective of this paper is to understand and study the effect of morphological parameters on the shear stiffness of an entangled cross-linked fibrous material made with carbon fibres where some of the contacts are bonded by the epoxy resin. This current work presents a 3D finite element model using ABAQUS/Standard in order to characterize the mechanical behaviour of different carbon fibre networks rigidified by epoxy cross-links. Numerical simulations are achieved on a representative volume element (RVE) with the orientation distribution of the fibres based on a tested sample. Since not all the strands are perfectly separated, an equivalent diameter of fibre is determined to obtain the rigidity experimentally measured in shear. Then, an investigation of the influence of morphological descriptors, such as the distance between cross-links, distribution fibre orientations and junction properties, is carried out. For the entangled cross-linked fibrous material with a small fibre volume fraction, the relationship between the shear stiffness and the fibre volume fraction is a linear function whereas the relation between the shear stiffness and the distance between junctions is a power law with exponent of −3/2. The shear stiffness depends slightly on the twisting joint stiffness, and its relationship with the tension joint stiffness is a logarithmic function. The effect of fibre stiffness is also investigated by taking Young's modulus values corresponding to those of glass fibres, inox fibres or aramid fibres. A linear function is obtained between the shear stiffness and the Young's modulus. These results are consistent with the analytical models in the literature for a cross-linked fibrous material.

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Section: Introductionsupporting

confidence: 70%

Numerical analysis of shear stiffness of an entangled cross-linked fibrous material

Chatti

Michon

Poquillon

2020

International Journal of Solids and Structures

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“…Recent studies showed that the mechanical prop erties of metal fiber networks, when compared with metal foams, are also very promising [12][13][14], Future studies will be devoted to quantify the static and dynamic energy absorption capacity of sandwich panels with metal fiber networks as the core.…”

Section: Resultsmentioning

confidence: 99%

Dynamic Crushing of All-Metallic Corrugated Panels Filled With Close-Celled Aluminum Foams

Han

et al. 2015

Journal of Applied Mechanics

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Under quasi-static uniaxial compression, inserting aluminum foams into the interstices o f a metallic sandwich panel with corrugated core increased significantly both its peak crushing strength and energy absorption per unit mass. This beneficial effect diminished however if the foam relative density was relatively low or the compression velocity became sufficiently high. To provide insight into the varying role o f aluminum foam filler with increasing compression velocity, the crushing response and collapse modes o f all metallic corrugate-cored sandwich panels filled with close-celled aluminum foams were studied using the method o f finite elemen ts (FEs). The constraint that sandwich panels with and without foam filling had the same total weight was enforced. The effects o f plastic hardening and strain rate sensitivity o f the strut material as well as foam!strut interfacial debonding were quantified. Three collapse modes (quasi-static, transition, and shock modes) were identified, corresponding to different ranges o f compression velocity. Strengthening due to foam insertion and inertial stabilization both acted to provide sup port fo r the struts against buckling. At relatively low compression velocities, the struts were mainly strengthened by the surrounding foam; at high compression velocities, inertia stabilization played a more dominant role than foam filling.

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“…In addition to the experiments with 3D RF materials, finite element modeling (FEM) has also been widely employed to study the mechanical properties of random structures in RF materials . For instance, by using the morphological characteristics of 3D RF material, such as fiber length, diameter, and distribution, as observed in experiments and defined with nonlinear elements, the compressive responses of such materials can be well simulated using 3D FE models .…”

Section: Introductionmentioning

confidence: 99%

High‐temperature short‐range compressive responses and contact effect of ultrahigh porosity 3D random fibrous materials

Xia

et al. 2018

J Am Ceram Soc

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Through experiments and finite element modeling (FEM) of contacting fibers, we study the compressive responses of a 3‐dimensional (3D) random fibrous (RF) material of ultrahigh porosity (89%) in the through‐the‐thickness (TTT) and in‐plane (IP) directions from 299 (room temperature) to 1273 K. The experimental results indicate that localized failure and overall compressive deformation dominate the deformation process of RF materials loaded in the TTT direction at low and high temperatures, respectively. On the other hand, only localized failure is observed in the IP direction upon loading. Based on its morphological characteristics, a FE model that considers contact between the fibers is developed to simulate the compressive responses of the tested 3D RF material. In this model, the contact mechanism between the fibers is simulated based on a user‐defined nonlinear spring element. The simulated strength and elastic modulus agree well with the observations from the compressive experiments.

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The mechanical behavior of porous metal fiber sintered sheets

Cited by 54 publications

References 51 publications

Numerical analysis of shear stiffness of an entangled cross-linked fibrous material

Numerical analysis of shear stiffness of an entangled cross-linked fibrous material

Dynamic Crushing of All-Metallic Corrugated Panels Filled With Close-Celled Aluminum Foams

High‐temperature short‐range compressive responses and contact effect of ultrahigh porosity 3D random fibrous materials

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