Dynamic stability of hybrid fiber/nanocomposite-reinforced toroidal shells subjected to the periodic axial and pressure loadings

Shahmohammadi, Mohammad Amin; Mirfatah, Sayed Mohamad; Salehipour, Hamzeh; Azhari, Fatemeh; Cívalek, Ömer

doi:10.1080/15376494.2022.2037172

Cited by 16 publications

(4 citation statements)

References 78 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the state p = 0 the resultant natural frequencies are related to free vibration of the shell panels without the effects of initial compressive stress. This effect is the main concept of dynamic stability of structures which has been focused in Keshtegar et al, 5 Al-Furjan et al, 28 Mirfatah et al, 38 and Shahmohammadi et al 62 At the following of this section, various boundary conditions and the corresponding approximating functions are presented in equation ( 17). [43][44][45] (1) Simply-supported edges at j 1 = 0, a and j 2 = 0, b (SSSS):…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

An analytical closed-form solution for free vibration and stability analysis of curved sandwich panels made of porous metal-foam core and nanocomposite reinforced face-sheets

Badarloo,

Salehipour

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

View full text Add to dashboard Cite

This paper aims to obtain an analytical solution for free vibration and stability analysis of shallow curved sandwich panels made of a porous metal-foam core and nanocomposites reinforced sheets resting on a Winkler-Pasternak elastic foundation. In this regard, two nanocomposites, carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs) are considered for reinforcing the face-sheets. The governing equations are developed by considering the transversal shear strains based on the first-order shear deformation theory (FSDT). The obtained system of differential equations representing the dynamic equilibrium and compatibility of the proposed curved sandwich panels are solved analytically, using the principal of Galerkin method. In order to examine the results of developed formulation, some benchmark examples are adopted from the existing literature and the obtained results corresponding to the considered examples are compared with those are presented in the references. Using the achieved numerical results in the framework of a comprehensive parametric study, the effects of various material and geometrical factors and also various boundary conditions on the natural frequencies and buckling loads of the proposed sandwich panels are assessed. By performing the extensive parametric study it was observed that several results corresponding to the free vibration and stability of the proposed sandwich panels can be achieved by the present method without spending much time for computations. On the contrary, in order to achieve the similar results using the numerical methods, a time-consuming process is required which can justify the novelty of the present work.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

An analytical closed-form solution for free vibration and stability analysis of curved sandwich panels made of porous metal-foam core and nanocomposite reinforced face-sheets

Badarloo,

Salehipour

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

Self Cite

View full text Add to dashboard Cite

show abstract

“…The complete failure criterion in the zero-normal-stiffness can be expressed as follows: (10) where Gi and Gic (i=s, t) are the s-or t-components of work done by the traction with their conjugate separations and the critical fracture energies required to cause failure, respectively. The evolution of the damage variable for linear softening can be calculated as follows: (11) where δm max stands for the maximum value of the effective separation, which is obtained during the loading history.…”

Section: Contact Surfacementioning

confidence: 99%

“…Therefore, it's essential for dam owners and operators to take the necessary precautions to prevent dam failures and to regularly assess the stability of the structures [6]. A wide variety of approaches can be used to gain a comprehensive understanding of a dam's performance and safety, such as finite element method [7][8][9][10][11], and extended finite element method [12,13]. Concrete arch dams are a type of dam that transfers the forces they encounter to their abutments.…”

Section: Introductionmentioning

confidence: 99%

Numerical assessment of the influences of uplift pressure in joints on the seismic response of an arch dam having a jointed foundation

Mostafaei

Mashayekhi²,

Herath³

et al. 2023

NMCE

View full text Add to dashboard Cite

Joints, which are usually located in the abutments of dams, play a vital role in the seismic stability evaluation of arch dams. This paper presents a comprehensive numerical investigation of the influence of uplift pressure in joints on the seismic response of an arch dam, with a focus on the interaction between the dam and the rock wedges. For this study, the Bakhtiari arch dam, having one rock wedge at each abutment, was chosen as a case study, and three distinct finite element models of the dam were developed. Three components of El Centro were applied to the dam's foundation, and the influences of dam-rock wedge interaction on the crest displacement time history and tensile damage of the arch dam were investigated. Four different scenarios were taken into account. The results indicated that taking uplift pressure in joints into account has important effects on the dam responses.

show abstract

Nonlinear forced vibration analysis of laminated composite doubly-curved shells enriched by nanocomposites incorporating foundation and thermal effects

Badarloo

Tayebikhorami

Mirfatah

et al. 2022

Aerospace Science and Technology

View full text Add to dashboard Cite

Dynamic stability of hybrid fiber/nanocomposite-reinforced toroidal shells subjected to the periodic axial and pressure loadings

Cited by 16 publications

References 78 publications

An analytical closed-form solution for free vibration and stability analysis of curved sandwich panels made of porous metal-foam core and nanocomposite reinforced face-sheets

An analytical closed-form solution for free vibration and stability analysis of curved sandwich panels made of porous metal-foam core and nanocomposite reinforced face-sheets

Numerical assessment of the influences of uplift pressure in joints on the seismic response of an arch dam having a jointed foundation

Nonlinear forced vibration analysis of laminated composite doubly-curved shells enriched by nanocomposites incorporating foundation and thermal effects

Contact Info

Product

Resources

About