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 paper, a pin reinforced polymer foam core with carbon fiber face sheets is used to evaluate the collapse properties of X-core composite panels, and explicit experimental observations are used to calibrate analytical energy balance models describing the panel collapse.
Abstract: New fabrication technologies now allow for hybrid sandwich structures, known as X-core, to be manufactured. The X-core panels consist of a pin reinforced polymer foam core with carbon fiber face sheets. Carbon fiber or metallic (Titanium/Steel) pins are inserted into the foam core in the out-of-plane direction and extend from face sheet to face sheet. The through thickness three-point simply supported bending behavior of these panels is used to evaluate the collapse characteristics of the panels. Explicit experimental observations are used to calibrate analytical energy balance models describing the panel collapse as a function of geometry and properties. The mechanical response of X-core sandwich panels is compared to current sandwich materials for material selection.
57 citations
TL;DR: In this paper, an experimental program of compression after impact tests (CAI) has been performed to quantitatively describe the decrease of the sandwich mechanical performance after an impact, and the results show a clear reduction of the residual strength of the damaged panels compared with undamaged ones.
Abstract: Sandwich panels are used in industrial fields where lightness and energy absorption capabilities are required. In order to increase their exploitation, a wide knowledge of their mechanical behavior also in severe loading conditions is crucial. Light structures such as the one studied in the present work, sandwich panels with aluminum skins and Nomex ™ honeycomb core, are exposed to a possible decrease of their structural integrity, resulting from a low velocity impact. In order to quantitatively describe the decrease of the sandwich mechanical performance after an impact, an experimental program of compression after impact tests (CAI) has been performed. Sandwich panel specimens have been damaged during a low velocity impact test phase, using an experimental apparatus based on a free fall mass tower. Different experimental impact energies have been tested. Damaged and undamaged specimens have been consequently tested adopting a compression after impact procedure. The relation between the residual strength of the panel and the possible relevant parameters has been statistically investigated. The results show a clear reduction of the residual strength of the damaged panels compared with undamaged ones. Nevertheless, a reduced dependency between the impact energy and the residual strength is found above a certain impact energy threshold.
56 citations
TL;DR: In this article, a new type of composite beam, referred to as Layered Sandwich Beam (LSB), is introduced, which consists of Glass Fiber Reinforced Polymer (GFRP) skins and Phenolic cores.
56 citations
TL;DR: In this article, the dynamic instability characteristics of sandwich panels with carbon nanotube (CNT) reinforced facesheets subjected to in-plane periodic load is investigated using a shear flexible QUAD-8 serendipity element.
56 citations
TL;DR: In this paper, a series of tests have been performed at RWTH Aachen University to investigate the loadbearing behavior of sandwich panels with thin TRC-facings and resilient insulation cores applied for self-supporting facades.
56 citations