Free vibration and buckling analysis of composite sandwich plates in thermal environment

Zhai, Yanchun; Su, Jianmin; Liang, Shuquan

doi:10.1177/1099636218795375

Cited by 10 publications

(9 citation statements)

References 29 publications

(31 reference statements)

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“…[34]. It can be concluded from Figure 3 that the results obtained from the present research are so close to those reported by Zhai et al [34] for thermal buckling analysis of sandwich plates.…”

Section: Verification Studysupporting

confidence: 90%

“…The structure is presumed to be exposed to environment with uninform temperature distribution. The material properties of the core and face sheets are considered as [34] :…”

Section: Verification Studymentioning

confidence: 99%

“…The proficiency of the applied approach was evaluated by comparing the results with three-dimensional solution. Zhai et al [34] investigated buckling temperature and natural frequencies of simply supported soft-core sandwich plates with single-layer orthotropic skins under thermal environments effects. They studied the buckling and vibration characteristics of sandwich plates analytically and concluded that they are significantly affected by temperature-induced thermal stresses.…”

Section: Introductionmentioning

confidence: 99%

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Hygrothermal effects on the buckling of soft‐core sandwich plates with composite layered face sheets

2020

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The present work attempts to investigate the influence of hygrothermal environments on the buckling of soft-core sandwich plates with laminated composite face sheets. The stability equations are derived based on piecewise low-order shear deformation theory (PLSDT) and then solved using different methods, depending on the boundary conditions. For fully simply supported sandwich plates, an analytical method is developed which results in some closed-form solutions. For sandwich plates with two parallel simply supported edges and two clamped edges, a semi-analytical solution is established using one-dimensional generalized differential quadrature (GDQ) technique. Finally, for fully clamped sandwich plates, twodimensional GDQ approach is applied to the governing equations. To validate the results of proposed methods, a comparative study with various examples is carried out verifying that the methods in the present work can accurately predict the buckling load of sandwich plates in hot and wet environments. Then, a comprehensive parametric study is performed to show the effects of temperature and moisture content on the buckling of sandwich plates for different parameters such as length-to-thickness ratio, core thickness, and boundary conditions. It is concluded that both temperature and moisture content have significant influences on the buckling behavior of sandwich plates.

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Section: Verification Studysupporting

confidence: 90%

“…The structure is presumed to be exposed to environment with uninform temperature distribution. The material properties of the core and face sheets are considered as [34] :…”

Section: Verification Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hygrothermal effects on the buckling of soft‐core sandwich plates with composite layered face sheets

2020

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“…The second comparison involves thermal buckling of a rectangular sandwich plate with soft core and single layer orthotropic face sheets (0 � =Core=0 � ). Zhai et al [16] used an analytical solution for this type of sandwich plate with only simply supported boundary conditions. The material properties of the core and face sheets are assumed as follows:…”

Section: Presentmentioning

confidence: 99%

“…It was also concluded that it is possible to maintain the fundamental natural frequency of the structure at a constant value under any operating temperature by implementing an appropriate stable gain control voltage. Zhai et al [16] focused on the buckling temperature and natural frequencies of sandwich plates with soft core and single-layer face sheets. They presented an analytical solution for buckling and vibration of sandwich plates with simply supported type of boundary conditions under thermal environments and illustrated the influence of geometrical parameters on the behaviour of structure in free vibration and buckling.…”

Section: Introductionmentioning

confidence: 99%

Thermal buckling analysis of sandwich plates with soft core and CNT-Reinforced composite face sheets

Kamarian

Bodaghi

Barbaz‐Isfahani

et al. 2020

Jnl of Sandwich Structures & Materials

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Previous studies on the thermal buckling of sandwich plates with composite face sheets indicate that only thin skins with high stiffness and low coefficients of thermal expansion (CTE) can lead to the desired buckling temperatures. Thus, carbon nanotubes (CNTs) that can significantly enhance thermo-mechanical properties of fibre-reinforced polymer composites are used in the present study to increase the critical buckling temperature of sandwich plates with soft core and laminated composite face sheets. First, a comprehensive series of experimental tests are conducted to evaluate the effects of nanotubes on thermo-mechanical properties of the face sheets. The experimental results indicate that using only 0.3% CNTs considerably increases the longitudinal and transverse Young’s modulus and shear modulus of the carbon fibre/epoxy composite face sheets. The obtained data also show that CNTs significantly decrease the CTE of composite skins. Subsequently, thermal buckling equations of sandwich plates with CNT-reinforced composite face sheets are derived based on piecewise low-order shear deformation theory (PLSDT). Three analytical, semi analytical, and numerical methods are used to investigate thermal buckling behaviour of the sandwich plates with various boundary conditions. To verify the results, several comparisons are performed, which show that the implemented methods can predict the buckling temperatures of sandwich plates with high accuracy. Finally, a parametric study is conducted to examine the effects of CNTs on the thermal buckling of sandwich plates for different length to thickness ratios, thicknesses of face sheets, stacking sequences of layers, and various types of boundary conditions. The results indicate that CNTs can increase the critical buckling temperature of sandwich plates by 22%–36%, based on the layup, geometrical parameters, and boundary conditions.

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Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

Al Mahmoud,

Safaei,

Sahmani

et al. 2024

Arch Computat Methods Eng

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Recently, the mechanical performance of various mechanical, electrical, and civil structures, including static and dynamic analysis, has been widely studied. Due to the neuroma's advanced technology in various engineering fields and applications, developing small-size structures has become highly demanded for several structural geometries. One of the most important is the nano/micro-plate structure. However, the essential nature of highly lightweight material with extraordinary mechanical, electrical, physical, and material characterizations makes researchers more interested in developing composite/laminated-composite-plate structures. To comprehend the dynamical behavior, precisely the linear/nonlinear-free vibrational responses, and to represent the enhancement of several parameters such as nonlocal, geometry, boundary condition parameters, etc., on the free vibrational performance at nano/micro scale size, it is revealed that to employ all various parameters into various mathematical equations and to solve the defined governing equations by analytical, numerical, high order, and mixed solutions. Thus, the presented literature review is considered the first work focused on investigating the linear/nonlinear free vibrational behavior of plates on a small scale and the impact of various parameters on both dimensional/dimensionless natural/fundamental frequency and Eigen-value. The literature is classified based on solution type and with/without considering the size dependency effect. As a key finding, most research in the literature implemented analytical or numerical solutions. The drawback of classical plate theory can be overcome by utilizing and developing the elasticity theories. The nonlocality, weight fraction of porosity, or the reinforcements, and its distribution type of elastic foundation significantly influence the frequencies.

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Free vibration and buckling analysis of composite sandwich plates in thermal environment

Cited by 10 publications

References 29 publications

Hygrothermal effects on the buckling of soft‐core sandwich plates with composite layered face sheets

Hygrothermal effects on the buckling of soft‐core sandwich plates with composite layered face sheets

Thermal buckling analysis of sandwich plates with soft core and CNT-Reinforced composite face sheets

Computational Linear and Nonlinear Free Vibration Analyses of Micro/Nanoscale Composite Plate-Type Structures With/Without Considering Size Dependency Effect: A Comprehensive Review

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