Topic
Sandwich panel
About: Sandwich panel is a research topic. Over the lifetime, 4665 publications have been published within this topic receiving 49812 citations.
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TL;DR: In this article, the authors presented the low-velocity impact behavior of sandwich panel with carbon fiber reinforced plastic (CFRP) composite facesheet and Nomex honeycomb core through experimental and numerical methods.
43 citations
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TL;DR: In this paper, a new computational procedure based on improved higher order sandwich plate theory (IHSAPT) and two models representing contact behavior between the impactor and the panel are adopted to study the low velocity impact phenomenon of sandwich panels comprising of a transversely flexible core and laminated composite face-sheets.
43 citations
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TL;DR: In this paper, the high-order buckling and free vibration behaviors of two types sandwich beams including AL or PVC-foam flexible core and CNTs reinforced nanocomposite face sheets using generalized differential quadrature method (GDQM) are investigated.
Abstract: In the present study, the high-order buckling and free vibration behaviors of two types sandwich beams including AL or PVC-foam flexible core and CNTs reinforced nanocomposite face sheets using generalized differential quadrature method (GDQM) are investigated. The high-order sandwich panel theory (HSAPT) for AL or PVC-foam flexible is employed and also the modified couple stress theory (MCST) for the face sheets is used. It is noted that the core of first sandwich beam is Aluminum alloy foam with variable mechanical properties and the other consists of PVC-foam core with temperature dependent mechanical properties. The governing partial differential equations of motion for two types sandwich beam are derived using Hamilton's principle and then discretized by using GDQM. These formulations yield nine partial differential equations which are coupled in axial and transverse deformations. A parametric study is carried out to investigate the effect of some important parameters such as slenderness ratio, face sheet thickness, temperature rise. Although increasing slenderness ratio, reduce the 1st natural frequency and also critical buckling load, but the treatment is different for AL-FCSB and PVC-FCSB. It is found that at high temperatures, the PVC-FCSB frequency decreases with increasing face sheet thickness whereas for AL-FCSB at high-temperatures although the frequency is less for low slenderness ratio and high face sheet thickness, but with increasing slenderness ratio frequency increases. This behavior is due to the large effect of face sheet and their temperature dependence in short sandwich beams compared with long ones.
43 citations
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TL;DR: In this paper, a statistical energy analysis (SEA) approach is used to predict the sound transmission loss (STL) of sandwich panels numerically, which accounts for both antisymmetric and symmetric (dilatational) motions.
Abstract: A statistical energy analysis (SEA) approach is used to predict the sound transmission loss (STL) of sandwich panels numerically. Unlike conventional SEA studies of the STL of sandwich panels, which consider only the antisymmetric (bending) motion of the sandwich panel, the present approach accounts for both antisymmetric and symmetric (dilatational) motions. Using the consistent higher-order sandwich plate theory, the wave numbers of the waves propagating in the sandwich panel were calculated. Using these wave numbers, the wave speed of the propagating waves, the modal density, and the radiation efficiency of the sandwich panels were determined. Finally, the sound transmission losses of two sandwich panels were calculated and compared with the experimentally measured values, as well as with conventional SEA predictions. The comparisons with the experimental data showed good agreement, and the superiority of the present approach relative to other approaches is discussed and analyzed.
43 citations
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TL;DR: In this paper, a combined analytical and experimental investigation of the indentation failure of a composite sandwich panel has been undertaken, where two cases have been studied: a sandwich panel with carbon/epoxy facing and a PVC foam layer supported on a rigid base and indented at the center with a cylindrical indentor.
Abstract: A combined analytical and experimental investigation of the indentation failure of a composite sandwich panel has been undertaken. Two cases have been studied: a sandwich panel with carbon/epoxy facing and a PVC foam layer supported on a rigid base and indented at the center with a cylindrical indentor; and a sandwich beam with symmetrical facing and core materials as in the sandwich panels. The load-deflection behavior of the loaded facing was monitored during the test. Strains were also measured near the load on both surfaces of the facing using embedded strain gages. A full-field analysis of the in-plane displacements in the foam was conducted using the moire method. The problem was modeled as an elastic beam resting on an elastic-plastic foundation. Initiation of indentation failure occurs when the foundation yields, while catastrophic failure takes place when the compression facing fractures. The experimental results are in good agreement with the results of the analytical modeling based on the Winkler foundation.
43 citations