Damping analysis of stiffened laminated composite plates in thermal environment

Chandra, S.; Maeder, Marcus; Sepahvand, K.; Matsagar, Vasant; Marburg, Steffen

doi:10.1016/j.compstruct.2022.116163

Cited by 3 publications

(5 citation statements)

References 60 publications

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“…In contrast, the variation in shock dissipation energy in the PEEK system is relatively small with temperature, indicating that the damping performance of PEEK is insensitive to temperature. This behavior can be attributed to the rigidity and thermal stability of the PEEK molecular chains. , …”

Section: Results and Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Molecular Origins of Shock Dissipation in Polymer-Based Nanocomposites

Li,

Mao,

Wang

et al. 2024

J. Phys. Chem. B

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To explain the molecular origin of shock dissipation in polymer-based composites, a new method is proposed by absolutely quantifying the relative position between molecular chains, which directly reflects the shock dissipation energy between molecular chains and at the interfaces with nanofillers during mechanical deformation. The effects of nanofiller content and system temperature on energy dissipation were examined based on this newly proposed method, and the differences in energy dissipation between the thermosetting polymer (polydimethylsiloxane) and thermoplastic polymer (polyether-ether-ketone) under identical physical conditions were both studied to validate the reliability of the quantification method proposed in this paper. The present study offers a tool that provides theoretical insights to understand the molecular origins of shock dissipation in polymer composites as well as to facilitate the optimal design of composites with outstanding damping characteristics.

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Section: Results and Discussionmentioning

confidence: 99%

“…This behavior can be attributed to the rigidity and thermal stability of the PEEK molecular chains. 28,32 3.3.6. Difference in Shock Dissipation Energy between PDMS and PEEK.…”

Section: Effect Of Gnp Content On Shock Dissipationmentioning

confidence: 99%

Molecular Origins of Shock Dissipation in Polymer-Based Nanocomposites

Li,

Mao,

Wang

et al. 2024

J. Phys. Chem. B

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“…Sinha et al [38][39][40] conducted numerical and experimental studies on the free vibration of glass-fiber laminated composite stiffened plates. Chandra et al [41,42] investigated the damping and structural dynamic responses of composite stiffened plates in a thermal environment. Wang et al [43] formulated an analytical model for the structural dynamic characteristics of stiffened composite sandwich plates embedded with multilayer viscoelastic damping membranes and validated this model through a comparison with FEM results.…”

Section: Introductionmentioning

confidence: 99%

“…= 0; setting m = M and n = N, Equation (41) transforms into a set of linear Equation (40) with 5 × (M + 1) × (N + 1) + 10 × (M + N + 2) unknown coefficients. The natural frequencies and mode shapes of the composite stiffened plate can be obtained by solving the eigenvalues and eigenvectors of Equation(41).…”

mentioning

confidence: 99%

Free and Forced Vibration Characteristics of a Composite Stiffened Plate Based on Energy Method

Gu,

Wang,

et al. 2024

JMSE

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The composite stiffened plate has garnered significant attention in the lightweight design of ship structures due to its superior mechanical properties. Although it reduces the structural weight, it also increases vibration sensitivity. Thus, investigating the vibration characteristics of the composite stiffened plate is crucial. This paper proposed a theoretical model based on the energy principle and the improved Fourier series method (IFSM) to analyze the composite stiffened plate vibration characteristics. The model demonstrates high reliability and accuracy, as confirmed through convergence analysis and comparison with experimental results from the published literature. Results indicate that geometry and material parameters significantly impact the natural frequency and can mitigate vibration responses by increasing thickness and stiffness. Additionally, ply design parameters markedly influence the vibration of composite stiffened plates, enhancing low-frequency vibration performance through optimal ply design. The structural parameters of the stiffeners, particularly the height and number of stiffeners, play a crucial role, enhancing stiffness and reducing the vibration responses of the composite stiffened plates.

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“…The analysis showed that established theory was feasible for solving large amplitude vibration of damping sandwich composite with nonlinear frequency dependence. Chandra et al 12 adopted the first-order shear deformation theory and considered viscoelastic properties of composite laminates to simulate the damping dynamic performance of composite laminates in thermal environment, so as to determine the most appropriate damping model to evaluate the damping effect. It was found that the damping analysis of energy method was a reliable method to evaluate the damping performance.…”

Section: Introductionmentioning

confidence: 99%

Free vibration of co‐curing damping sandwich composites with different lay‐up angles

Zheng,

Zhou,

et al. 2023

Polymer Composites

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In this article, the dynamic characteristics of Co‐curing Damping Sandwich Composites with Different Lay‐up Angles (CDSCDLA) are studied by means of modal analysis and numerical simulation to optimize the structure of co‐curing composites. The vibration equilibrium equation of CDSCDLA is derived according to first order shear deformation theory and Hamilton equation. The dynamic model of the structure is established by finite element simulation to verify the accuracy of the theoretical calculation. The influence of different lay‐up angle and the damping film thickness on the free vibration of CDSCDLA is explored under the condition of constant skin thickness. The theoretical derivation and finite element simulation results reveals that the overall dynamic characteristic of damping sandwich composite with a lay‐up angle of 45° is optimal when the damping film thickness is constant. In particular, when the thickness of the damping film is 0.1 mm, the first‐order mode damping and mode frequency of composite plate with a lay‐up angle of 45° reach the maximum value of 0.1495 and 747.9 Hz, respectively. The first order damping loss factor of the CDSCDLA with different layup angles is maximum when the damping film thickness is 0.3 mm. However, blindly increasing the damping layer thickness can not always improve the damping performance of the composite structure, but will greatly reduce the stiffness of the composite. The work provides a reference for dynamic performance optimization and structural design of sandwich plate with high strength and large damping loss factor.Highlights Free vibration of sandwich composites with lay‐up angles is investigated. The dynamic analytical model of the structure is established. The validity of the derived theory is verified by numerical simulation.

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Damping analysis of stiffened laminated composite plates in thermal environment

Cited by 3 publications

References 60 publications

Molecular Origins of Shock Dissipation in Polymer-Based Nanocomposites

Molecular Origins of Shock Dissipation in Polymer-Based Nanocomposites

Free and Forced Vibration Characteristics of a Composite Stiffened Plate Based on Energy Method

Free vibration of co‐curing damping sandwich composites with different lay‐up angles

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