Topic
Sandwich-structured composite
About: Sandwich-structured composite is a research topic. Over the lifetime, 5853 publications have been published within this topic receiving 101126 citations.
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TL;DR: In this article, the authors used pulsed eddy current (PEC) and two features, representing the magnetic field intensity and conductivity, were used to characterise the different types of defects in carbon fiber reinforced plastics (CFRP) laminates and honeycomb sandwich panels.
Abstract: With the growing interest to use composite materials and honeycomb sandwich panels in industrial fields, much attention is devoted to the development of non-destructive testing (NDT) techniques for the detection and evaluation of defects. In this work, scanning pulsed eddy current (PEC) was investigated and two features, representing the magnetic field intensity and conductivity, were used to characterise the different types of defects in carbon fibre reinforced plastics (CFRP) laminates and honeycomb sandwich panels. The experimental results show that the low energy impact from 4 J to 12 J, conductive and non-conductive insert defects can be effectively detected and evaluated using the proposed methods. The effectiveness was verified and the advantages of scanning PEC were addressed through comparative studies with flash thermography and shearography.
106 citations
TL;DR: In this article, a new approach to active cooling performance is presented, and the results show that some geometric parameters can be fixed without much detriment in thermal performance, while optimal core densities are typically 25-50%, near-optimal results can be obtained with densities as low as 10%.
106 citations
TL;DR: In this paper, the results of an experimental and numerical study of precast reinforced composite sandwich panels were presented, and a semi-empirical formula was proposed to better fit the experimental and the FEA results.
106 citations
TL;DR: In this article, a simple test geometry has been developed for characterising adhesion between the composite skin and the lightweight core in a sandwich structure, which has been applied to characterise adhesion in a number of balsa-based glass-fibre-reinforced sandwich structures.
105 citations
TL;DR: In this paper, periodical grids were selected to reinforce soft honeycomb cores of sandwich structures and a finite element method was proposed to calculate the critical buckling load of the combined core sandwich structures.
Abstract: In the present study, periodical grids were selected to reinforce soft honeycomb cores of sandwich structures. The grid reinforced honeycomb core can be considered as a combined core with multi-level lattice configuration. In-plane compression tests were carried out to investigate the mechanical properties of carbon fiber sandwich with combined core. Experimental results indicated that the combined core sandwich specimens provided increased stiffness, specific stiffness, energy absorption and critical load, which were higher than the sum of honeycomb core sandwich specimens and grid core sandwich specimens. In addition, a Finite Element Method (FEM) model was proposed to calculate the critical buckling load of the combined core sandwich structures. The effects of core heights, honeycomb-wall thickness and face-sheet thickness on the critical buckling loads of the combined core sandwich structures were examined. The aforementioned experimental and numerical results indicated that the present sandwich structure with grid reinforced honeycomb core could provide improved structural properties for engineering structures.
105 citations