Finite element study on elastic transition in platelet reinforced composites

Safaei, Babak; Fattahi, A. M.; Chu, Fulei

doi:10.1007/s00542-017-3651-y

Cited by 51 publications

(18 citation statements)

References 21 publications

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“…(9) in the weak form of governing thermal equation Eq. (7) was resulted in following discrete mesh-free form [38]:…”

Section: Meshless Formulationsmentioning

confidence: 99%

“…Because of such extraordinary thermal behavior, these two nanofiller are excellent candidates to improve thermal conductivity of polymeric nanocomposite materials. On the other hand, it is well established that the FG dispersion of nanofiller in nanocomposite materials results in more manageable thermal-mechanical responses of nanocomposite structures [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Graphene and CNT impact on heat transfer response of nanocomposite cylinders

Behdinan

Moradi‐Dastjerdi

Safaei

et al. 2020

Nanotechnology Reviews

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AbstractReinforcing polymers with nanofillers is an advanced approach to improve and manage the thermal behaviors of polymeric nanocomposite materials. Among the proposed nanofillers, graphene and carbon nanotube (CNT) with superior thermal conductivity are two advanced nanofillers, which have extensively been utilized to enhance the heat transfer responses of host polymeric materials. In this work, the impacts of randomly oriented graphene and CNT to steady state and transient heat transfer behaviors of functionally graded (FG) nanocomposite cylinders have been investigated using an axisymmetric model. Nanocomposite cylinders have been assumed to be under heat fluxes, heat convections or temperatures as different types of thermal boundary conditions. The thermal properties of the resulted nanocomposite materials are estimated by micromechanical model. Moreover, the governing thermal equations of axisymmetric cylinders have been analyzed using a highly consistent and reliable developed mesh-free method. This numerical method predicts temperature fields via MLS shape functions and imposes essential boundary conditions with transformation approach. The effects of nanofiller content and distribution as well as thermal boundary conditions on the heat transfer responses of nanocomposite cylinders are studied. The results indicated that the use of nanofiller resulted in shorter stationary times and higher temperature gradients in FG nanocomposite cylinders. Moreover, the use of graphene in nanocomposites had stronger impact on thermal response than CNT.

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“…(9) in the weak form of governing thermal equation Eq. (7) was resulted in following discrete mesh-free form [38]:…”

Section: Meshless Formulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Graphene and CNT impact on heat transfer response of nanocomposite cylinders

Behdinan

Moradi‐Dastjerdi

Safaei

et al. 2020

Nanotechnology Reviews

Self Cite

View full text Add to dashboard Cite

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“…For instance, Safaei et al [6] introduced a finite element model for graphene platelet-reinforced composites. Selim et al [7] investigated the active vibration control FG composite plates coated with piezoelectric layers.…”

Section: Introductionmentioning

confidence: 99%

On size-dependent large-amplitude free oscillations of FGPM nanoshells incorporating vibrational mode interactions

Sahmani

Safaei

2020

Archiv.Civ.Mech.Eng

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At nanoscale, surface free energies of the atoms located on the free surfaces of structures significantly affect their mechanical characteristics. In this study, nonlinear large-amplitude free vibration response of nanoshells prepared from functionally graded porous materials (FGPM) is investigated by taking into account surface stress size effects and vibrational mode interactions. Non-classical shell model is constructed on the basis of the Gurtin-Murdoch type of the surface theory of elasticity having the capability of capturing surface stress size dependency. The accuracy of nonlinear vibration analysis is improved by incorporating the interaction of the main vibration mode and the first, third and fifth symmetric oscillation modes. Moreover, the closed-cell Gaussian-Random field scheme is put to use to extract the mechanical characteristics of FGPM nanoshell. Multiple timescales technique is then applied to achieve surface stress elastic-based nonlinear frequency of FGPM nanoshell analytically for different interactions between vibrational modes. It is revealed that by incorporating the interactions of the main vibration mode and higher symmetric oscillation modes, the behavior of the backbone curves belongs to the nonlinear free oscillation response of FGPM nanoshells changes from hardening to softening schema. It is found that when only the main vibration mode is taken into account, surface elasticity effects makes an enhancement in the significance of the hardening schema. However, by considering the interactions of higher symmetric oscillation modes, surface elasticity effects makes a reduction in the significance of the softening schema.

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“…[3][4][5] Several experimental tests on investigation of the flexural behavior of composite panels with delamination have been carried out. [6][7][8][9] In addition, numerical techniques and parametric study 10 and the finite element (FE) analysis [11][12][13] are also employed to investigate buckling behavior of reinforced sandwich composite beams and plates.…”

Section: Introductionmentioning

confidence: 99%

Failure study of fiber/epoxy composite laminate interface using cohesive multiscale model

Moheimani

Sarayloo

Dalir

2020

Advanced Composites Letters

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In this study, finite element modeling is performed to investigate the compressive failure of the composite sandwich structures with layered composite shells. An embedded debond area between the layered composite shell and the foam core is assumed as a defect. The composite shells are several plies of equal thickness Kevlar, carbon fiber composite, and E-glass composite with epoxy resin. Three different lay-ups, namely, (0°/90°/0°/90°/0°/90°), (45°/−45°/0°/90°/60°/−30°), and (60°/−30°/90°/0°/30°/90°) are considered for symmetric and asymmetric sequences. The work focuses on the importance of cohesive zone model versus the previously conducted numerical simulation and experimental results for buckling of sandwich composite structures. This enables one to account for delamination growth between shells and core and improve the correlation results with those of experiments. It has been shown that not only the cohesive model is capable of demonstrating delamination propagation, but it also correlates very well with the experimental data. By compiling user-defined cohesive mesoscale model in Abaqus simulation, the local and global buckling of the face-sheets can be precisely detected and response of sandwich structure becomes mesh independent, while mesh size is reduced.

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Finite element study on elastic transition in platelet reinforced composites

Cited by 51 publications

References 21 publications

Graphene and CNT impact on heat transfer response of nanocomposite cylinders

Graphene and CNT impact on heat transfer response of nanocomposite cylinders

On size-dependent large-amplitude free oscillations of FGPM nanoshells incorporating vibrational mode interactions

Failure study of fiber/epoxy composite laminate interface using cohesive multiscale model

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