Size-dependent thermal buckling analysis of micro composite laminated beams using modified couple stress theory

Mohammadabadi, Mostafa; Daneshmehr, Alireza; Homayounfard, Milad

doi:10.1016/j.ijengsci.2015.03.005

Cited by 54 publications

(7 citation statements)

References 40 publications

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“…According to Gururaja & Ramulu [7], the minimum critical thrust force corresponds to a value of = ( 11 22 ⁄ ) 1 4 , as shown in Fig. 3.…”

mentioning

confidence: 93%

“…Fibre reinforced polymer (FRP) composite laminates possess attractive characteristics like chemical resistance, low weight, design flexibility, high strength and high stiffness-to-weight ratio [1][2][3][4]. These properties account for manufacturing of structural parts with FRP composite in the aircraft and spacecraft industries, where drilling of the structural parts is frequently encountered for manufacturing either riveted assemblies or structural repairs [1,5,6].…”

Section: Introductionmentioning

confidence: 99%

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Thermo-mechanical modelling of FRP cross-ply composite laminates drilling: Delamination damage analysis

Ismail

Ojo

Dhakal

2017

Composites Part B: Engineering

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Among other factors, thrust force, feed rate, twist drill bit chisel edge and point angle are the principal factors responsible for delamination drilling-induced damage during thermomechanical deformation. Hence, in this paper, an analytical thermo-mechanical model is proposed to predict critical feed rate and critical thrust force at the onset of delamination crack on CFRP composite cross-ply laminates, using the principle of linear elastic fracture mechanics (LEFM), laminated classical plate theory, cutting mechanics and energy conservation theory. The delamination zone (crack opening Mode I) is modelled as an elliptical plate. The advantages of this proposed model over the existing models in literature are that the influence of drill geometry (chisel edge and point angle) on push-out delamination are incorporated, and mixed loads condition are considered. The forces on chisel edges and cutting lips are modelled as a concentrated (point) and uniformly distributed loads, resulting into a better prediction. The model is validated with models in the literature and the results obtained show the flexibility of the proposed model to imitate the results of existing models.

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“…According to Gururaja & Ramulu [7], the minimum critical thrust force corresponds to a value of = ( 11 22 ⁄ ) 1 4 , as shown in Fig. 3.…”

mentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Thermo-mechanical modelling of FRP cross-ply composite laminates drilling: Delamination damage analysis

Ismail

Ojo

Dhakal

2017

Composites Part B: Engineering

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“…Also, axial buckling of double-walled boron nitride nanotubes (DWBNNTs) under combined electro-thermo-mechanical loadings is investigated by Arani et al [25]. Mohammadabadi et al [26] studied the thermal effect on size-dependent buckling behavior of micro-composite laminated beams.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear vibration and buckling of functionally graded porous nanoscaled beams

Mirjavadi

Afshari

Khezel

et al. 2018

J Braz. Soc. Mech. Sci. Eng.

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Although many researchers have studied the vibration and buckling behavior of porous materials, the behavior of porous nanobeams is still a needed issue to be studied. This paper is focused on the buckling and nonlinear vibration of functionally graded (FG) porous nanobeam for the first time. Nonlinear Von Kármán strains are put into consideration to study the nonlinear behavior of nanobeam based on the Euler-Bernoulli beam theory. The nonlocal Eringen's theory is used to study the size effects. The mechanical properties of ceramic and metal are used to model the functionally graded material through thickness, and the boundary conditions are considered as clamped-clamped (CC) and simply supportedsimply supported (SS). The generalized differential quadrature method (GDQM) is used in conjunction with the iterative method to solve the equations. The parametric study is done to examine the effects of nonlinearity, porosity, sized effect, FG index, etc., on the vibration and buckling of porous nanobeam.

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“…An important issue in the theoretical analysis of small-scale mechanisms is to take into account small-size effects (Akgöz & Civalek, 2011;Dai, Wang, & Wang, 2015;Dehrouyeh-Semnani, 2014;Kahrobaiyan, Rahaeifard, Tajalli, & Ahmadian, 2012;Karparvarfard, Asghari, & Vatankhah, 2015;Kong, Zhou, Nie, & Wang, 2008) on the dynamical performance; this has been ignored in the dynamical performance analysis of microgyroscopes. This paper is the first which takes this effect into account via use of the modified couple stress theory (Dehrouyeh-Semnani, 2015;Ghayesh & Farokhi, 2015a, 2015bGhayesh, Farokhi, & Alici, 2015;Mohammadabadi, Daneshmehr, & Homayounfard, 2015;Rahaeifard, 2015;Şim¸sek & Reddy, 2013). As we shall see, this effect changes the sensitivity of the system.…”

Section: Introductionmentioning

confidence: 99%