Mechanical properties of Nomex honeycomb sandwich panels under dynamic impact

Xie, Suchao; Jing, Kunkun; Zhou, Hui; Xiang, Liang

doi:10.1016/j.compstruct.2019.111814

Cited by 91 publications

(34 citation statements)

References 44 publications

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“…Multifunctional design of lightweight hybrid structure can make it competitive in aircraft and aerospace applications, such as combination of load carrying and electromagnetic wave absorption. Lattice structures (such as corrugated cores [ 1 ] and honeycomb cores [ 2 , 3 ]) have advantages in load bearing [ 4 ] and impact energy-absorption applications [ 5 , 6 , 7 ], due to their high specific strength and specific energy absorption (SEA). In addition, honeycombs by foam filling or resistive-films attachment [ 8 , 9 , 10 , 11 ] can also have advantages in electromagnetic wave absorption.…”

Section: Introductionmentioning

confidence: 99%

Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

et al. 2020

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Polylactic acid (PLA) hexagonal honeycomb structures were fabricated by using 3D-printing technology. By filling with absorbent polymethacrylimide (PMI) foam, a novel absorbent-foam-filled 3D-printed honeycomb was obtained. The in-plane (L- and W-direction) and out-of-plane (T-direction) compressive performances were studied experimentally and numerically. Due to absorbent PMI foam filling, the elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass of absorbent-foam-filled honeycomb under L-direction were increased by 296.34%, 168.75%, 505.57%, and 244.22%, respectively. Moreover, the elastic modulus, compressive strength, energy absorption per unit volume, and energy absorption per unit mass, under W-direction, also have increments of 211.65%, 179.85, 799.45%, and 413.02%, respectively. However, for out-of-plane compression, the compressive strength and energy absorption per unit volume were enhanced, but the density has also been increased; thus, it is not competitive in energy absorption per unit mass. Failure mechanism and dimension effects of absorbent-foam-filled honeycomb were also considered. The approach of absorbent foam filling made the 3D-printed honeycomb structure more competitive in electromagnetic wave stealth applications, while acting simultaneously as load-carrying structures.

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Section: Introductionmentioning

confidence: 99%

Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

et al. 2020

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“…The sun is an energy source that is expected to be able to overcome or solve the problem of future energy needs after various conventional energy sources are reduced in number and are not friendly to the environment. Solar panels also have the advantage of being a practical and environmentally friendly energy source considering that they do not require transmission such as an electricity grid conventional, because it can be installed modularly in any location that requires it [6]. METHODS Sunlight is converted into electricity by photovoltaic panels, mostly using Poly Cristallyne Silicon as their photocell semiconductor material.…”

Section: Solar Cellmentioning

confidence: 99%

“…[5] Record the temperature and time indicated by a temperature gauge and a stopwatch. [6] Record the total time taken from the temperature of 25 0 C to 0 . temperature 0 0 C…”

Section: Solar Cellmentioning

confidence: 99%

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Analysis Of The Coefficien Of Performance (COP) Freezer Produced By Solar Cell

Lubis

Pane

2021

International Journal of Science, Technology & Management

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The use of freezer machines has now become a necessity for the wider community, because it is very helpful for humans in everyday life. The cooling load given greatly affects the performance of the freezer, both in terms of electrical energy consumption and the ability to increase system usage time. The greater the cooling load will increase the use of electrical energy during operation. This is very worrying in the future where the issue of depleting fossil energy sources which is currently a priority for producing electrical energy is increasing and filling the media. In recent years, solar energy has been rumored to be the answer to this problem. Where heat energy from the sun is used to move protons and electrons in a solar panel media to produce electrical energy that can be used for the needs of many people. This has become the attraction of researchers to make an innovation in the use of solar energy in a freezer system. Judging from the research roadmap related to solar energy and the vapor compression system in the freezer that was launched in the last few years, not many innovations have been carried out in the use of energy sources. The cooling load to be used will be adjusted to the capacity of the energy source used, which is 410 WP. With the capacity of the freezer that is used with a power of 1/4 PK which will increase its ability/ efficiency to be used and replace the paid electric energy freezer. This is expected to be useful for the public and contribute knowledge and help realize the university roadmap in the future.

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“…in-walled structures are studied from simple circular, square, triangular, polygonal, and other conventional structures [2][3][4][5][6]; the deformation mode of conventional structures was studied in detail by experiment and theory. Based on these, various methods have been used to improve the mechanical properties of traditional tubes, including multi-cornered section structure [7], corrugated tubes [8][9][10], multi-cell structure [11], nested tubular structures [12][13][14], filling tubes with foam [15,16], honeycomb structure based on bionic design [17][18][19][20], and variable thickness design [21][22][23][24]. However, in the process of improving the performance, the deformation mode of some structures is unstable, which does not make the maximum energy absorption efficiency of the material.…”

Section: Introductionmentioning

confidence: 99%

Crashworthiness Analysis and Multi-Objective Optimisation of Multi-Cell Windowed Structures under Dynamic Impact Loading

Chen

Liang

et al. 2022

Shock and Vibration

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Applying a windowed design in a thin-walled structure is a method to further enhance the crashworthiness of the structure. In this study, two kinds of windowed designs were introduced into different regions of a multi-cell energy absorption structure to form a multi-cell windowed structure, and its crashworthiness under dynamic impact was studied. Dynamic impact testing and LS-DYNA finite element modelling were combined to calculate the crashworthiness response of the structure. The simulation results show that the use of the windowed multi-cell structure can improve the crashworthiness response of the multi-cell structure. The influence of the windowed design on the structural deformation mode was analysed in detail. In addition, the multi-objective optimization design of different windowed structures was carried out to obtain a comprehensive crashworthiness evaluation, and the results show that the windowed design at the front end of the structure yields good results regarding the initial peak force (PCF), while the windowed design in the middle of the structure can effectively improve the specific energy absorption (SEA) and energy absorption (EA).

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Mechanical properties of Nomex honeycomb sandwich panels under dynamic impact

Cited by 91 publications

References 44 publications

Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

Effect of Absorbent Foam Filling on Mechanical Behaviors of 3D-Printed Honeycombs

Analysis Of The Coefficien Of Performance (COP) Freezer Produced By Solar Cell

Crashworthiness Analysis and Multi-Objective Optimisation of Multi-Cell Windowed Structures under Dynamic Impact Loading

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