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Analytical study on the dynamic mechanical behaviours of foam-core sandwich plate under repeated impacts
https://orcid.org/0000-0002-5461-9795
Highlights An analytical model on the dynamic responses of foam-core sandwich plates under repeated wedge impacts is proposed based on the rigid-perfectly plastic theory. Repeated impact tests of PVC foam-core sandwich plates were conducted by using a horizontal impact experimental apparatus. Theoretical results of foam-core sandwich plates under repeated impacts are in good agreement with experimental and numerical results. The influence of energy levels on impact force and permanent deformation is carried out.
Abstract The foam-core sandwich structures are probably subjected to repeated impact loadings in engineering applications, resulting in structural plastic deformation and accumulative damage. A valuable analytical approach is needed to predict the accumulative plastic deformation of foam-core sandwich structures under repeated impacts. In this paper, an analytical model of the dynamic responses of foam-core sandwich plates under repeated impacts is proposed using the circumscribing yield locus and the inscribing yield locus based on the rigid-perfectly plastic theory. By employing the principle of energy dissipation rate balance, the analytical expressions of structure permanent deformation and peak force are obtained from the iteration of initial conditions. In addition, polyvinyl chloride (PVC) foam has steady chemical properties and corrosion resistance, which can better adapt to the practical environment and meet the needs of structural protection. To validate the proposed analytical model, the repeated impact dynamic mechanical behaviours of PVC foam-core sandwich plates were experimentally and numerically studied. Results show that theoretical results such as the permanent deformation, peak force, and deformation modes of foam-core sandwich plates under repeated impacts are in good agreement with experimental and numerical results. With the increase in impact numbers, the global bending deformation and local indentation deformation of facesheets increase, the PVC foam core layer is constantly being compressed, and the bottom facesheet plays an increasingly important part in the repeated impact energy absorption with a maximum value of 29.20 %.
Analytical study on the dynamic mechanical behaviours of foam-core sandwich plate under repeated impacts
https://orcid.org/0000-0002-5461-9795
Highlights An analytical model on the dynamic responses of foam-core sandwich plates under repeated wedge impacts is proposed based on the rigid-perfectly plastic theory. Repeated impact tests of PVC foam-core sandwich plates were conducted by using a horizontal impact experimental apparatus. Theoretical results of foam-core sandwich plates under repeated impacts are in good agreement with experimental and numerical results. The influence of energy levels on impact force and permanent deformation is carried out.
Abstract The foam-core sandwich structures are probably subjected to repeated impact loadings in engineering applications, resulting in structural plastic deformation and accumulative damage. A valuable analytical approach is needed to predict the accumulative plastic deformation of foam-core sandwich structures under repeated impacts. In this paper, an analytical model of the dynamic responses of foam-core sandwich plates under repeated impacts is proposed using the circumscribing yield locus and the inscribing yield locus based on the rigid-perfectly plastic theory. By employing the principle of energy dissipation rate balance, the analytical expressions of structure permanent deformation and peak force are obtained from the iteration of initial conditions. In addition, polyvinyl chloride (PVC) foam has steady chemical properties and corrosion resistance, which can better adapt to the practical environment and meet the needs of structural protection. To validate the proposed analytical model, the repeated impact dynamic mechanical behaviours of PVC foam-core sandwich plates were experimentally and numerically studied. Results show that theoretical results such as the permanent deformation, peak force, and deformation modes of foam-core sandwich plates under repeated impacts are in good agreement with experimental and numerical results. With the increase in impact numbers, the global bending deformation and local indentation deformation of facesheets increase, the PVC foam core layer is constantly being compressed, and the bottom facesheet plays an increasingly important part in the repeated impact energy absorption with a maximum value of 29.20 %.
Analytical study on the dynamic mechanical behaviours of foam-core sandwich plate under repeated impacts
https://orcid.org/0000-0002-5461-9795
Highlights An analytical model on the dynamic responses of foam-core sandwich plates under repeated wedge impacts is proposed based on the rigid-perfectly plastic theory. Repeated impact tests of PVC foam-core sandwich plates were conducted by using a horizontal impact experimental apparatus. Theoretical results of foam-core sandwich plates under repeated impacts are in good agreement with experimental and numerical results. The influence of energy levels on impact force and permanent deformation is carried out.
Abstract The foam-core sandwich structures are probably subjected to repeated impact loadings in engineering applications, resulting in structural plastic deformation and accumulative damage. A valuable analytical approach is needed to predict the accumulative plastic deformation of foam-core sandwich structures under repeated impacts. In this paper, an analytical model of the dynamic responses of foam-core sandwich plates under repeated impacts is proposed using the circumscribing yield locus and the inscribing yield locus based on the rigid-perfectly plastic theory. By employing the principle of energy dissipation rate balance, the analytical expressions of structure permanent deformation and peak force are obtained from the iteration of initial conditions. In addition, polyvinyl chloride (PVC) foam has steady chemical properties and corrosion resistance, which can better adapt to the practical environment and meet the needs of structural protection. To validate the proposed analytical model, the repeated impact dynamic mechanical behaviours of PVC foam-core sandwich plates were experimentally and numerically studied. Results show that theoretical results such as the permanent deformation, peak force, and deformation modes of foam-core sandwich plates under repeated impacts are in good agreement with experimental and numerical results. With the increase in impact numbers, the global bending deformation and local indentation deformation of facesheets increase, the PVC foam core layer is constantly being compressed, and the bottom facesheet plays an increasingly important part in the repeated impact energy absorption with a maximum value of 29.20 %.
Analytical study on the dynamic mechanical behaviours of foam-core sandwich plate under repeated impacts
Xiao, Wen (Autor:in) / Li, Yinggang (Autor:in) / Hu, Yong (Autor:in) / Song, Zeyuan (Autor:in) / Cai, Wei (Autor:in) / Li, Xiaobin (Autor:in)
Thin-Walled Structures ; 196
10.12.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
| British Library Online Contents | 2018
| British Library Online Contents | 2018
| British Library Online Contents | 2012