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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 paper, a linear analysis is presented for determining the shear buckling load of a rectangular, sandwich panel with constant cylindrical curvature and having specially orthotropic facings and core.
Abstract: A linear analysis is presented for determining the shear buckling load of a rectangular, sandwich panel with constant cylindrical curvature and having specially orthotropic facings and core. Solution for classical simplesupport boundary conditions was carried out by the Galerkin method, taking precautions not to "escalate" the equations by differentiati on. This resulted in two doubly infinite sets of eigenvalue equations, representing buckling in the symmetric and unsymmetric modes. Numerical solutions were obtained on a digital computer and the results were compared with those of previous analyses for special cases and with limited test data available for the general case. Finally parametric design curves are presented for a range of parameters.
16 citations
TL;DR: In this paper, an experimental-numerical framework was established to simulate the dynamic response of aluminium foam-based sandwich panels subjected to bird strike, where the smooth particle hydrodynamics (SPH) algorithm was used to model the bird, an elastic-plastic material model with isotropic damage is used to describe aluminium skin, and the Deshpande-Fleck foam model was employed to describe the foam core.
Abstract: This study attempts to establish an experimental–numerical framework to simulate the dynamic response of aluminium foam-based sandwich panels subjected to bird strike. The numerical model is developed with the non-linear dynamic finite element code PAM-CRASH, where the smooth particle hydrodynamics (SPH) algorithm is used to model the bird, an elastic–plastic material model with isotropic damage is used to describe aluminium skin and the Deshpande–Fleck foam model is used to describe the foam core. Mechanical tests of the skin and foam materials as well as bird-strike tests of a double sandwich panel are conducted and the experimental results are used to calibrate the model parameters. The bird-strike simulation results show reasonably good agreement with test data, indicating the simulation method is capable of predicting the dynamic response of aluminium foam-based sandwich panels in the event of bird strike. Finally a series of parametric studies are conducted to examine the effects of foam thickness a...
16 citations
TL;DR: In this article, the role of the face-sheets has been assessed by considering beams with front-and-back faces present, and with front face present but back face absent, under simply supported and clamped boundary conditions.
Abstract: Stainless steel sandwich beams with a corrugated core or a Y-frame core have been tested in three-point bending and the role of the face-sheets has been assessed by considering beams with (i) front-and-back faces present, and (ii) front face present but back face absent A fair comparison between competing beam designs is made on an equal mass basis by doubling the front face thickness when the back face is absent The quasistatic, three-point bending responses were measured under simply supported and clamped boundary conditions For both end conditions and for both types of core, the sandwich beams containing front-and-back faces underwent indentation beneath the midspan roller whereas Brazier plastic buckling was responsible for the collapse of sandwich beams absent the back face Three-dimensional finite element (FE) predictions were in good agreement with the measured responses and gave additional insight into the deformation modes The FE method was also used to study the effect of (i) mass distribution between core and face-sheets and (ii) beam span upon the collapse response of a simply supported sandwich panel Sandwich panels of short span are plastically indented by the mid-span roller and the panels absent a back face are stronger than those with front-andback faces present In contrast, sandwich panels of long span undergo Brazier plastic buckling, and the presence of a back face strengthens the panel [DOI: 101115/14004555]
16 citations
TL;DR: In this article, the free vibrations of rectangular sandwich plates having two adjacent edges fully clamped and the remaining two edges free (CFCF) were investigated by applying Hamilton's principle in conjunction with the first-order shear deformation theory.
16 citations
TL;DR: In this paper, an optimization problem concerning sandwich panels is investigated by simultaneously considering the two objectives of minimizing the panel mass and maximizing the sound insulation performance, and a solution algorithm based on the non-dominated sorting genetic algorithm II (NSGA-II) is provided to solve the proposed model.
Abstract: In this study, an optimization problem concerning sandwich panels is investigated by simultaneously considering the two objectives of minimizing the panel mass and maximizing the sound insulation performance. First of all, the acoustic model of sandwich panels is discussed, which provides a foundation to model the acoustic objective function. Then the optimization problem is formulated as a bi-objective programming model, and a solution algorithm based on the non-dominated sorting genetic algorithm II (NSGA-II) is provided to solve the proposed model. Finally, taking an example of a sandwich panel that is expected to be used as an automotive roof panel, numerical experiments are carried out to verify the effectiveness of the proposed model and solution algorithm. Numerical results demonstrate in detail how the core material, geometric constraints and mechanical constraints impact the optimal designs of sandwich panels.
16 citations