Low-velocity impact response of sandwich conical shell with agglomerated single-walled carbon nanotubes-reinforced face sheets considering structural damping

Azizi, A.; Khalili, S.M.R.; Fard, K. Malekzadeh

doi:10.1177/1099636217715807

Cited by 10 publications

(5 citation statements)

References 36 publications

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“…Therefore, some qualitative comparisons were done between the results of the present paper and the results of other papers. According to the previous studies, for example, references 17 and, 18 adding nanoparticles caused an increase in the contact force and a reduction in the contact duration which is consistent with the results of the present study.…”

Section: Results Of Abaqus Simulation Of Impact On Sandwich Structuressupporting

confidence: 93%

“…For the first time, Hosur et al 17 studied the low-velocity impact response of sandwich structures reinforced with nanoclay experimentally. Different nanoparticles including single-walled carbon nanotubes, 18 multi-walled carbon nanotubes, 19 and graphene 20 were added to the face sheets or the core of sandwich structures for increasing the impact properties of the sandwich targets. In some studies, the nano reinforcements were added to the adhesive layer between the core and the face sheets.…”

Section: Introductionmentioning

confidence: 99%

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Sensitivity of the impact performance of nano reinforced sandwich structures to the material and geometrical variations

Tofighi

Biglari

Shokrieh

2022

Journal of Composite Materials

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The low-velocity impact response of sandwich structures with aluminum face sheets and neat or nano-reinforced polypropylene core was studied. A strain-rate dependent micromechanics model (SRDM) was presented in the literature for predicting the dynamic behavior of nano-reinforced polymers. In the present study, the dynamic behavior of nano-reinforced polypropylene was simulated based on SRDM results. The finite element model was validated against the experimental results. It was shown that the results of the simulation performed by the SRDM model were in very good agreement with the experimental data. Then, the proposed finite element model was used for checking the sensitivity of the impact performance of nano-reinforced sandwich structures to the material and geometrical variations. A special sandwich structure with a core of 1 mm thickness and a face thickness of 1 mm was considered as the base structure. Different material and geometrical variations including doubling the thickness of the core or face sheets, a different weight ratio of graphene, and increasing material parameters of the face sheets up to 90%, were undertaken on the base structure. The results of the present study imply that the optimal amount of graphene should not exceed 0.5 wt.% to improve impact properties. The impact response of nano-reinforced sandwich structures was more sensitive to the variations of the face thickness in comparison to the variations of the core thickness. Moreover, the impact outputs were more sensitive to changes in the yield stress of faces compared to changes in Young’s modulus of faces.

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Section: Results Of Abaqus Simulation Of Impact On Sandwich Structuressupporting

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Sensitivity of the impact performance of nano reinforced sandwich structures to the material and geometrical variations

Tofighi

Biglari

Shokrieh

2022

Journal of Composite Materials

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“…Tey stated in their paper that the infuence of material features, rotary inertia, and shear deformation of the beam system is included. Azizi et al [15] handled the small fast impulse reaction and dynamic stresses of compound Sandwich truncated conical shells with a compressible or incompressible kernel. It was stated that the efects are accepted to take place usually on the top face sheet, and the interplay between the impactor and the structure is simulated employing a new equivalent three-degree-offreedom spring-mass-damper pattern.…”

Section: Introductionmentioning

confidence: 99%

Examination of Precast Concrete Movement Subjected to Vibration Employing Mass-Spring Model with Two Convective Masses

Aktas

2024

Shock and Vibration

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This article investigates the movement of concrete subjected to vibration employing mass-spring model. For this purpose, two different prefabricated concrete-formworks, on which experimental work was done before, were analysed analytically. The theoretical modeling of precast formworks employed in experiments has been made by the three-dimensional finite element method employing the SAP2000 program. Modeling of mortar is performed to resolve the interaction between the fresh concrete and formwork using the mass-spring model. Considering the dynamic behavior of the fluid, it is possible to define multiple oscillation (convective) masses with different frequency values in addition to the impulse mass. Thus, one impulse mass and two convective masses were used in the mass-spring model. This study is essentially theoretical, and its accuracy has been strengthened by experimental work. The time-dependent results of concrete movement obtained from the dynamic mass-spring model were compared with the measured ones. The matches indicate that the findings are consistent.

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“…The dynamic behavior of laminated conical shells subjected to impact load was not much explored, although conical shells have many practical applications in modern engineering. An analytical approach was presented by Azizi 25 to study the low-velocity impact behavior of agglomerated SWCNTs-reinforced conical sandwich frusta using spring–mass–damper (SMD) model. Das et al 26 presented the time-dependent response of impact-induced functionally graded conical shell considering porosity.…”

Section: Introductionmentioning

confidence: 99%

Study on CNT reinforced functionally graded sandwich conical shell subjected to low-velocity impact under thermal environment

Das

2022

Noise & Vibration Worldwide

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In the present work, low-velocity impact behavior of pre-twisted carbon nanotubes (CNTs) reinforced functionally graded (FG) sandwich conical shell panels is studied using finite element method. The top and bottom face sheets are reinforced with single-walled CNTs reinforced FG materials with various patterns. The temperature-dependent material properties of the CNTs reinforced functionally graded facings are evaluated using micromechanical models. The dynamic equilibrium equation of the impacted sandwich panel is formulated using Lagrange’s equation. A modified Hertzian contact law is used to evaluate contact force. The solutions of the resulting equations are obtained using Newmark’s time integration method. After validation study of the present method, the effects of the CNTs grading pattern, velocity of the impactor, size of the impactor, CNTs volume fraction, operating temperature, angle of twist, and core-to-facing thickness ratio on the low-velocity impact response of the CNTs reinforced functionally graded sandwich conical shell panel are studied in detail. Numerical results show that increasing the volume fraction of CNTs increases the contact force while a lower contact force is predicted at elevated temperatures.

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Low-velocity impact response of sandwich conical shell with agglomerated single-walled carbon nanotubes-reinforced face sheets considering structural damping

Cited by 10 publications

References 36 publications

Sensitivity of the impact performance of nano reinforced sandwich structures to the material and geometrical variations

Sensitivity of the impact performance of nano reinforced sandwich structures to the material and geometrical variations

Examination of Precast Concrete Movement Subjected to Vibration Employing Mass-Spring Model with Two Convective Masses

Study on CNT reinforced functionally graded sandwich conical shell subjected to low-velocity impact under thermal environment

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