A micromechanics-based incremental damage model for carbon black filled rubbers

Jiang, Yunpeng; Shi, Xueping; Qiu, Kun

doi:10.1016/j.compositesb.2015.01.027

Cited by 11 publications

(5 citation statements)

References 47 publications

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“…Periodic boundary conditions are considered to be the most efficient and accurate choice for calculating the properties of RVEs . The prescription of periodic boundary conditions can be challenging for complicated meshes, therefore mixed boundary conditions are used more often in finite element modeling of the damping properties of polymer composites …”

Section: Finite Element Modelmentioning

confidence: 99%

“…[49][50][51][52][53] The prescription of periodic boundary conditions can be challenging for complicated meshes, therefore mixed boundary conditions are used more often in finite element modeling of the damping properties of polymer composites. [9,13,54] In this paper, for the purpose of understanding the impact of boundary conditions on the predicted values of the damping of polymer composites, we use both mixed and periodic boundary conditions.…”

Section: Boundary Conditionsmentioning

confidence: 99%

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A Stochastic Analysis of the Damping Property of Filled Elastomers

Kulkarni

Tabarraei

2018

Macro Theory & Simulations

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Finite elements modeling is used to investigate the damping property of Polymer composites consisting of a viscoelastic matrix and randomly dispersed elastic particles. The impact of vibration frequency, inclusions size and volume fraction on the damping capability of polymer composites are studied. It is shown that analytical micromechanics methods give accurate predictions only when inclusions volume fraction is small. The results show that loading frequency and inclusions volume fraction significantly impact the damping capability of polymer composites. The effect of domain boundary conditions on the simulation results is studied by conducting finite element modelings on representative volume elements (RVEs) which are subjected to periodic or mixed boundary conditions. The modeling results indicate that both boundary conditions lead to similar predictions for damping. Sensitivity analyses are conducted to assess how material properties influence the damping property. The sensitivity analyses show that an increase in the stiffness of the composite matrix leads to a reduction in the damping capability of polymer composites. In contrast, an increase in the stiffness of inclusions results in an increase in the damping capability of polymer composites. Moreover, the damping properties are improved if the relaxation time of the viscoelastic matrix is increased.

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Section: Finite Element Modelmentioning

confidence: 99%

Section: Boundary Conditionsmentioning

confidence: 99%

A Stochastic Analysis of the Damping Property of Filled Elastomers

Kulkarni

Tabarraei

2018

Macro Theory & Simulations

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“…Different from hard resin-based or ceramic-based composite materials [4][5][6], due to the high elasticity of rubber, conductive rubber composite materials are used as sensors, thermistors, wearable electronic devices and electromagnetic material [7][8][9][10][11][12][13]. At present, in order to improve the microwave absorption of rubber-based composites, some conductive particles, such as carbon black (CB) [14][15][16], single-wall carbon nanotubes [17], multi-wall carbon nanotubes [18], barium titanate (BT) [19], M-type hexagonal ferrites [20], Pb (Mg 1/3 Nb 2/3 ) 0.65 Ti 0.35 O 3 powder [21] and carbonyl iron [22,23] are added alone. Alternatively, two kinds of conductive particles are added to the rubber matrix, such as CB and carbon nanotubes [24] and CB and strontium ferrite [25].…”

Section: Introductionmentioning

confidence: 99%

Mechanical and Dielectric Properties of a Flexible Anisotropic Rubber-Based Composite

et al. 2022

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Rubber-based conductive composites are widely used in sensors, wearable electronic devices and electromagnetic fields. In this work, by using the two-roll milling and hot-pressing process, chopped glass fiber (CGF) and graphene (Gr) as additives, and acrtlinitrile-brtadiene rubber (NBR) as the matrix, a series of anisotropic flexible rubber-based composites were prepared. Using this preparation method, both CGF and Gr additives were directly arranged in the material. When the content of CGF was 1 wt.%, the tensile strength in both the T and W directions of the material reached 27 MPa and 28 MPa, respectively. When the content of CGF was fixed at 1 wt.% and Gr was 1.5 wt.% and the elongation at break in both directions reached 328% and 347%. By focusing on the comparison of the dielectric differences in the T and W directions in the X band, it was found that the directional arrangement of the additives led to differences in the dielectric properties.

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“…As these materials are characterized by a highly heterogeneous microstructure with pores and/or soft inclusions [13,14], the type of computational model depends on the desired scale at which the corresponding physical mechanisms are specified: macro-, micro-, or mesoscale. In contrast to macrosopic phenomenological models [15][16][17][18] where the microstructure is treated as a homogeneous medium, continuum micromechanics models take into account the influence of the microstructure using the matrix-inclusion concept [19] in conjunction with inelastic material laws defined at the microscale (elastoplasic [20][21][22] or hyperelastic [23][24][25]) and the utilization of nonlinear homogenization schemes [26,27]. However, as the microstructure is not explicitly resolved but idealized in terms of a representative effective medium, deformation gradients at the scale of microstructure and formation of localization bands cannot be simulated.…”

Section: Introductionmentioning

confidence: 99%

Cementitious Composites with High Compaction Potential: Modeling and Calibration

Iskhakov

Timothy

et al. 2020

Materials

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There is an increasing need for the development of novel technologies for tunnel construction in difficult geological conditions to protect segmental linings from unexpected large deformations. In the context of mechanized tunneling, one method to increase the damage tolerance of tunnel linings in such conditions is the integration of a compressible two-component grout for the annular gap between the segmental linings and the deformable ground. In this regard, expanded polystyrene (EPS) lightweight concrete/mortar has received increasing interest as a potential “candidate material” for the aforementioned application. In particular, the behavior of the EPS lightweight composites can be customized by modifying their pore structure to accommodate deformations due to specific geological conditions such as squeezing rocks. To this end, novel compressible cementitious EPS-based composite materials with high compaction potential have been developed. Specimens prepared from these composites have been subjected to compressive loads with and without lateral confinement. Based on these experimental data a computational model based on the Discrete Element Method (DEM) has been calibrated and validated. The proposed calibration procedure allows for modeling and prognosis of a wide variety of composite materials with a high compaction potential. The calibration procedure is characterized by the identification of physically quantifiable parameters and the use of phenomenological submodels. Model prognoses show excellent agreement with new experimental measurements that were not incorporated in the calibration procedure.

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A micromechanics-based incremental damage model for carbon black filled rubbers

Cited by 11 publications

References 47 publications

A Stochastic Analysis of the Damping Property of Filled Elastomers

A Stochastic Analysis of the Damping Property of Filled Elastomers

Mechanical and Dielectric Properties of a Flexible Anisotropic Rubber-Based Composite

Cementitious Composites with High Compaction Potential: Modeling and Calibration

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