A new numerical approach and visco-refined zigzag theory for blast analysis of auxetic honeycomb plates integrated by multiphase nanocomposite facesheets in hygrothermal environment

Hajmohammad, Mohammad Hadi; Nouri, Amir Hossein; Zarei, Mohammad; Kolahchi, Reza

doi:10.1007/s00366-018-0655-x

Cited by 59 publications

(23 citation statements)

References 41 publications

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“…As can be seen, the present results are in good agreement with Ref. [20] which shows the accuracy of the obtained results.…”

Section: Numerical Resultssupporting

confidence: 92%

“…Considering the material properties the same as Ref. [20], the dynamic deflection of the structure is shown in Figure 2. As can be seen, the present results are in good agreement with Ref.…”

Section: Numerical Resultsmentioning

confidence: 99%

“…Hajmohammad et al. [20] suggested a mathematical model for the dynamic response of sandwich plates subjected to a blast load using a numerical method.…”

Section: Introductionmentioning

confidence: 99%

“…Boldrin et al [15] described a vibroacoustics analysis of auxetic gradient honeycomb composite structures with hexagonal configurations. Duc et al [16][17][18][19][20] studied many works in the mentioned field. He and co-authors studied dynamic response and vibration of different structures such as composite double curved shallow shells with auxetic honeycombs core [16], sandwich auxetic composite cylindrical panels [17], imperfect functionally graded CNT reinforced composite double curved shallow shells [18], imperfect functionally graded material (FGM) thick plates [19].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic deflection analysis induced by blast load in viscoelastic sandwich plates with nanocomposite facesheets

Mahjoobi

Bidgoli

2019

Jnl of Sandwich Structures & Materials

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The current work suggests a mathematical model for the dynamic response of sandwich concrete foundation with nano-fiber reinforced polymer (NFRP) layers at the top and bottom face sheets subjected to a blast load. The facesheets are reinforced by carbon nano-fibers where the equivalent material properties of the nanocomposite layers are obtained using Mori-Tanaka model considering agglomeration effects. The Kelvin-Voigt model is employed to consider the viscoelastic properties of the structure. The sandwich structure is rested on a soil foundation which is modeled by spring element. Based on refined zigzag theory, energy method and Hamilton’s principle, the motion equations are derived. The differential quadrature method in conjunction with Newmark method is utilized for obtaining the dynamic deflection of the structure for different boundary conditions. The effects of various parameters such as blast load, soil foundation, structural damping, volume fraction of carbon nano-fibers, NFRP layer, geometrical parameters of the structure are considered on the dynamic deflection of the structure. The results show that the NFRP layer can improve the resistance of the concrete foundation with respect to blast load.

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“…As can be seen, the present results are in good agreement with Ref. [20] which shows the accuracy of the obtained results.…”

Section: Numerical Resultssupporting

confidence: 92%

Section: Numerical Resultsmentioning

confidence: 99%

“…Hajmohammad et al. [20] suggested a mathematical model for the dynamic response of sandwich plates subjected to a blast load using a numerical method.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamic deflection analysis induced by blast load in viscoelastic sandwich plates with nanocomposite facesheets

Mahjoobi

Bidgoli

2019

Jnl of Sandwich Structures & Materials

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“…Among them, re-entrant auxetic structures are considered the most important especially when manufactured from high-ductility material. Re-entrant structures exhibit high stability, high load-carrying capacity, and high ductility under dynamic loading [ 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

4D Printing of NiTi Auxetic Structure with Improved Ballistic Performance

et al. 2020

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Auxetic structures have attracted attention in energy absorption applications owing to their improved shear modulus and enhanced resistance to indentation. On the other hand, four-dimensional (4D) printing is an emerging technology that is capable of 3D printing smart materials with additional functionality. This paper introduces the development of a NiTi negative-Poisson’s-ratio structure with superelasticity/shape memory capabilities for improved ballistic applications. An analytical model was initially used to optimize the geometrical parameters of a re-entrant auxetic structure. It was found that the re-entrant auxetic structure with a cell angle of −30° produced the highest Poisson’s ratio of −2.089. The 4D printing process using a powder bed fusion system was used to fabricate the optimized NiTi auxetic structure. The measured negative Poisson’s ratio of the fabricated auxetic structure was found in agreement with both the analytical model and the finite element simulation. A finite element model was developed to simulate the dynamic response of the optimized auxetic NiTi structure subjected to different projectile speeds. Three stages of the impact process describing the penetration of the top plate, auxetic structure, and bottom plate have been identified. The results show that the optimized auxetic structures affect the dynamic response of the projectile by getting denser toward the impact location. This helped to improve the energy absorbed per unit mass of the NiTi auxetic structure to about two times higher than that of the solid NiTi plate and five times higher than that of the solid conventional steel plate.

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The effect of pharmaceutical nanoparticles and atherosclerosis in aorta artery on the instable blood velocity based on numerical method

Motaghedifar

Fakhar

Tabatabaei

et al. 2022

Numer Methods Biomed Eng

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In medicine field, dynamic investigation of aorta artery has received attention due to its notable functions and significance upon performance of heart and individual health. Because, aortic injuries cause lethal occurrences having numerous mortality rates. Therefore, more probes, in particular, dynamic response of aorta arteries conveying blood flow containing pharmaceutical nanoparticles is essential. In present research, we attempt to model biomechanically the dynamic instability assessment of aorta arteries with atherosclerosis in tissue matrix conveying blood including pharmaceutical magnetic nanoparticles. Thus, according to classical cylindrical shell theory, the aorta arteries will be considered as elastic cylindrical vessels and symmetric lipid tissue is utilized in order to model atherosclerosis in the artery. Applying magnetic field to nanoparticles results in attraction of lipid tissue in artery. Moreover, the nature of blood flow is regarded non‐Newtonian based on Casson, Carreau, and power law models. Using Hamilton's principle, the motion equations are derived and based on differential quadrature method, the dynamic instability region of aorta artery is obtained. The influences of different variables such as magnetic field, magnetic nanoparticle's volume percent, combined effects of the tissue, lipid's height and length, and non‐Newtonian models upon dynamic behavior of aorta artery are investigated. According to the results, increase in lipid's height leads to increase in resonance frequency of aorta arteries.

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A new numerical approach and visco-refined zigzag theory for blast analysis of auxetic honeycomb plates integrated by multiphase nanocomposite facesheets in hygrothermal environment

Cited by 59 publications

References 41 publications

Dynamic deflection analysis induced by blast load in viscoelastic sandwich plates with nanocomposite facesheets

Dynamic deflection analysis induced by blast load in viscoelastic sandwich plates with nanocomposite facesheets

4D Printing of NiTi Auxetic Structure with Improved Ballistic Performance

The effect of pharmaceutical nanoparticles and atherosclerosis in aorta artery on the instable blood velocity based on numerical method

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