A theoretical investigation on low-velocity impact response of a curved sandwich beam

Sadeghpour, Ebrahim; Afshin, M.; Sadighi, Mojtaba

doi:10.1016/j.ijmecsci.2015.07.011

Cited by 16 publications

(3 citation statements)

References 27 publications

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“…Aerospace structures may encounter low-velocity impact caused by sources such as tool drop, runway stones, etc. According to the literature, the analytical modeling procedure of impact can be classified into three types [16]: spring-mass models [17,18], energy balance models [19,20], structural models based on plate theories(including 1-tem Ritz method [21] and N-term Ritz method [22]).…”

Section: Introductionmentioning

confidence: 99%

Eccentric low-velocity impact on fiber-metal laminates under in-plane loading using unified zigzag theory

Ghalami-Choobar

Liaghat

Sadighi

et al. 2018

Composite Structures

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This paper investigates the eccentric low-velocity impact of Fiber metal laminates (FMLs) subjected to spherical projectile using a unified ZigZag plate theory. The presented zigzag plate theory enforces transverse shear stress continuity through the thickness and can be reduced to conventional plate theories using appropriate shape function. The governing equations and suitable boundary conditions are obtained using the principle of minimum total potenital energy. Runge-Kutta method is employed to solve initial value problem resulted by the method of Ritz. The present model is validated by comparison and good agreement between its results and those of reports in open literature. Influence of various specifications of impact phenomenon such as laminate thickness, projectile radius, projectile velocity, in-plane load and eccentricity parameter is examined on deflection and contact force time history. The obtained results indicate that continuity of transverse shear stress is required to achieve accurate contact force even for moderately thin FMLs.

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Section: Introductionmentioning

confidence: 99%

Eccentric low-velocity impact on fiber-metal laminates under in-plane loading using unified zigzag theory

Ghalami-Choobar

Liaghat

Sadighi

et al. 2018

Composite Structures

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“…Using the Timoshenko beam theory, Jam and Kiani (2015) analyzed the response of functionally graded carbon nanotube-reinforced composite (FG-CNTRC) beam subjected to the action of an impacting mass. Sadeghpour et al (2015) studied the low-velocity impact behavior of a curved Sandwich beam using two methods, a new high-order model and the layerwise theory. An experimental research of nanoclay reinforced beam subjected to low-velocity impact was studied by Heydari-Meybodi et al (2016).…”

Section: Introductionmentioning

confidence: 99%

Effect of the multiple projectile on the low-velocity impact response of CNTs reinforced beam

Qanber

Alhusseini

Al-Kasob

et al. 2020

MMMS

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PurposeThe main objective of this article is to develop a theoretical formulation for predicting the response of CNTs reinforced beam under multiple impactors with general boundary conditions, using first-order shear deformation beam theory.Design/methodology/approachThe rule of mixtures is implemented to derive the material properties of the beam. The nonlinear Hertz contact law is applied for simulation between impactors and the surface of the beam. A combination of approaches includes energy method, Ritz method and generalized Lagrange equations are used to extract the matrix form of equations of motion. The time-domain solution is obtained using implementing the well-known Runge Kutta 4th order method.FindingsAfter examining the accuracy of the present method, the effects of the number of impactors include one impactor, and three impactors in various CNTs volume fraction are studied for CNTs reinforced beam with clamped-clamped, clamped-free and simply supported boundary conditions under the low-velocity impact. The most important finding of this article is that contact force and beam indentation at the middle of the beam in the case of one impactor are greater than those reported in the case of three impactors.Originality/valueThis article fulfills an identified need to study how CNTs reinforced beam behaviour with general boundary conditions under multiple low-velocity impacts can be enabled.

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“…Using the dynamic stiffness method, Damanpack and Khalili (2012) studied free vibration analysis of three-layered symmetric sandwich beams with a flexible core. Sadeghpour et al (2015) evaluated free vibration analysis of a debonded curved sandwich beam using high-order sandwich theory based on Timoshenko beam theory. By considering high-order theory, Sadeghpour et al (2016) considered the free vibration response of a debonded curved sandwich beam using Lagrange’s principle and the Rayleigh–Ritz method.…”

Section: Introductionmentioning

confidence: 99%

Free vibration analysis of micro-magneto-electro-elastic cylindrical sandwich panel considering functionally graded carbon nanotube–reinforced nanocomposite face sheets, various circuit boundary conditions, and temperature-dependent material properties using high-order sandwich panel theory and modified strain gradient theory

Mohammadimehr

Alavi

Okhravi

et al. 2017

Journal of Intelligent Material Systems and Structures

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In this article, based on high-order sandwich panel theory and modified strain gradient theory, free vibration analysis of a micro-magneto-electro-elastic sandwich panel with a transversely flexible core and functionally graded carbon nanotube–reinforced nanocomposite face sheets is investigated. Also, the influences of temperature-dependent material properties and various circuit boundary conditions such as open and closed are considered in this study. Carbon nanotubes are arranged in longitudinal direction inside polyvinylidene fluoride matrix with various functionally graded (FG) distributions such as uniform, FG-V, FG-A, FG-X, and FG-O in the face sheets. The generalized rule of mixture is employed to predict mechanical, electrical, magnetic, and thermal properties of micro-sandwich composite panel. The classical shell theory and an elasticity high-order theory are used for the face sheets and the core, respectively. Then, the governing equations of motion are derived using Hamilton’s principle. In this article, the influences of the volume fraction, the various distributions of carbon nanotubes, the multi-physical fields, open- and closed-circuit boundary conditions, the material length scale parameters, different face sheet and core thicknesses, and temperature changes on the natural frequency are investigated, and the obtained results show that these influences play an important role in the natural frequencies and can be used in order to prevent the resonance phenomenon and also for manufacturing process design and optimization of micro-magneto-electro-elastic composite sandwich cylindrical panels.

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A theoretical investigation on low-velocity impact response of a curved sandwich beam

Cited by 16 publications

References 27 publications

Eccentric low-velocity impact on fiber-metal laminates under in-plane loading using unified zigzag theory

Eccentric low-velocity impact on fiber-metal laminates under in-plane loading using unified zigzag theory

Effect of the multiple projectile on the low-velocity impact response of CNTs reinforced beam

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