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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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Journal ArticleDOI
TL;DR: In this article, an experimental investigation on impact response of sandwich composite panels with thermoplastic and thermoset face-sheet is presented. And the authors show that sandwich composites must have the harmony between core and the face sheet material.
Abstract: This paper presents an experimental investigation on impact response of sandwich composite panels with thermoplastic and thermoset face-sheet. E-glass reinforced epoxy (thermoset) and polypropylene (thermoplastic) have been used to produce polymer composite face-sheets. PVC foam was used as a core material. Several low velocity impact tests were performed under various impact energies. Besides to the individual impact behavior of the thermoset and thermoplastic sandwich composites, the impact response of sandwich composites having hybrid sequences was also investigated. Along with images of damaged samples, variations of the impact characteristics such as absorbed energy, maximum contact force and maximum deflection of the samples are provided. Most particularly this study showed that sandwich composites must have the harmony between core and the face sheet material. The deformation required for core densification must be able to compensate by the face sheet material.

76 citations

Journal ArticleDOI
TL;DR: In this article, the structural integrity of a minehunting ship made from glass fibre reinforced polymer (GFRP) laminate skins over a core of foamed poly vinyl chloride (PVC) is discussed.

76 citations

Journal ArticleDOI
TL;DR: In this paper, a continuum constitutive law for the elastic-plastic response of the square honeycomb topology is proposed to account for the effects of mean stress and the associated compressibility upon plastic straining.
Abstract: Metallic sandwich panels with periodic lattice cores exhibit superior strength and blast resistance relative to monolithic plates of equivalent weight. Their implementation into engineering structures requires computationally-efficient analysis and design codes that properly account for the complex deformation modes within such cores. The objective of the present article is to devise and assess a continuum constitutive law and to demonstrate its application to the elastic–plastic response of one particular topology: the square honeycomb. The law is based on Hill's yield criterion for orthotropic materials, modified to account for the effects of mean stress and the associated compressibility upon plastic straining. Parameters characterizing initial yield are obtained from both approximate stress analyses and finite element calculations of unit cells. Finite element calculations are also used to calibrate the hardening. Once calibrated, the law is used to simulate the bending response of various sandwich pa...

76 citations

Journal ArticleDOI
TL;DR: In this article, semi-empirical numerical models are developed for predicting the residual strength of impact-damaged sandwich composites comprised of woven fabric carbon epoxy facesheets and Nomex honeycomb cores subjected to compression-after-impact loading.

76 citations

Journal ArticleDOI
TL;DR: In this article, a numerical model was developed and validated by comparing the simulation results with the experimental results in terms of deformation modes and back facesheet deflection, and an optimization study was performed to improve the blast resistance of graded core sandwich panels.
Abstract: Structural responses, deformation modes, blast resistance and energy absorption of foam core signify some major functional characteristics for design of sandwich panels. This study aimed to address these issues by investigating uniform and graded foam core configurations. First, an experimental study was performed and the testing results of blast-loaded sandwich panels were analyzed. Second, a numerical model was developed and validated by comparing the simulation results with the experimental results in terms of deformation modes and back facesheet deflection. Third, the blast resistance of sandwich panels was comprehensively studied based upon the developed numerical models. Due to the high attenuation ability of the shock induced stress wave, the foam core with descending gradient of layer density across the thickness direction provided the highest blast resistance of all the core configurations considered here and its advantage could be further improved by enlarging the density difference of the core layer. While keeping total facesheet thickness unchanged, a relatively thick back facesheet is beneficial to enhance the blast resistance under relative low blast intensity. Finally, an optimization study was performed to improve the blast resistance of graded core sandwich panels. For the single objective optimization, the maximum back facesheet deflection of the optimum design decreased by 24.58% in comparison with that for the initial baseline design. For the multiobjective optimization, the optimal designs obtained from the Pareto solution can significantly enhance weight efficiency without compromising the resistance.

76 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023194
2022402
2021298
2020299
2019273
2018271