Free vibration and buckling of foam-filled composite corrugated sandwich plates under thermal loading

Han, Bin; Qin, Ke-Ke; Zhang, Qiancheng; Zhang, Qi; Lu, Tian Jian; Lu, Bingheng

doi:10.1016/j.compstruct.2017.03.051

Cited by 56 publications

(22 citation statements)

References 54 publications

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“…For the foam-filled corrugated core (k = 2), the effective stiffness matrices and thermal expansion coefficient are obtained from a homogenization method [19], in which the coupling effects between the corrugated structure and the filled foam are concerned. When the MD of the foam-filled corrugated core coincides with the x-direction of the global coordinate system, the plane stress-reduced and transverse shear stiffness matrices the foam-filled corrugated core are given as Q (2)…”

Section: Stress-strain Relationsmentioning

confidence: 99%

“…The HCS plates all made of Ti-6Al-4V with Rohacell 31 foam filled are taken into consideration. The material properties of the foam and base structures that are listed in Tables 1 and 2 refer to the values given by Han [19]. The number of the unit cells with triangular corrugated-core shape is n c = 25 and other dimensions are a/h = 50, b/a = 1,…”

Section: Validation Studymentioning

confidence: 99%

“…The HCS plates all made of Ti-6Al-4V with Rohacell 31 foam filled are taken into consideration. The material properties of the foam and base structures that are listed in Table 1 and Table 2 refer to the values given by Han [19]. The number of the unit cells with triangular corrugated-core shape is nc = 25 and other dimensions are a/h = 50, b/a = 1, h1 = h3 = hf = 0.1 h, t = 0.1 h. In the MSC.Nastran software, the corrugated sandwich plate and the filling foam are both simulated by CHEXA solid elements with totally 142,500 elements and 193,431 nodes as shown in Figure 3.…”

Section: Validation Studymentioning

confidence: 99%

“…Han et al [18] revealed that filling foam contributed to both enhanced buckling resistance and additional mass, and subsequently assessed the structural efficiency through optimization study. Furthermore, they derived the effective thermoelastic properties of the HCS plates using a homogenization method based on the Gibbs free energy [19]. Yang et al [20] compared modal characteristics of empty and foam-filled corrugated sandwich cylindrical panels by experiments and numerical analysis.…”

mentioning

confidence: 99%

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Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Zhuang

Yang

2020

Applied Sciences

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Hybrid corrugated sandwich (HCS) plates have become a promising candidate for novel thermal protection systems (TPS) due to their multi-functionality of load bearing and thermal protection. For hypersonic vehicles, the novel TPS that performs some structural functions is a potential method of saving weight, which is significant in reducing expensive design/manufacture cost. Considering the novel TPS exposed to severe thermal and aerodynamic environments, the mechanical stability of the HCS plates under fluid-structure-thermal coupling is crucial for preliminary design of the TPS. In this paper, an innovative layerwise finite element model of the HCS plates is presented, and coupled fluid-structure-thermal analysis is performed with a parameter study. The proposed method is validated to be accurate and efficient against commercial software simulation. Results have shown that the mechanical instability of the HCS plates can be induced by fluid-structure coupling and further accelerated by thermal effect. The influences of geometric parameters on thermal buckling and dynamic stability present opposite tendencies, indicating a tradeoff is required for the TPS design. The present analytical model and numerical results provide design guidance in the practical application of the novel TPS.

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Section: Stress-strain Relationsmentioning

confidence: 99%

Section: Validation Studymentioning

confidence: 99%

Section: Validation Studymentioning

confidence: 99%

mentioning

confidence: 99%

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Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Zhuang

Yang

2020

Applied Sciences

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“…The researchers showed the variations of the critical buckling temperatures, natural frequencies and mode shapes against various effective parameters like core thickness. Han et al [32] developed a new, accurate and simple refined theory to examine buckling and free vibration of foam-filled corrugated rectangular sandwich plates with simply supported boundary conditions considering thermal influence of environment. They showed that foam filling can decrease the performance of the structure in buckling and vibration up to 13.7%.…”

Section: Introductionmentioning

confidence: 99%

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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Thermal post-buckling and vibration analysis of a symmetric sandwich beam with clamped and simply supported boundary conditions

Zhao

2017

Arch Appl Mech

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Free vibration and buckling of foam-filled composite corrugated sandwich plates under thermal loading

Cited by 56 publications

References 54 publications

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

Mechanical Stability of Hybrid Corrugated Sandwich Plates under Fluid-Structure-Thermal Coupling for Novel Thermal Protection Systems

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

Thermal post-buckling and vibration analysis of a symmetric sandwich beam with clamped and simply supported boundary conditions

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