Dynamic crushing and energy absorption of sandwich structures with combined geometry shell cores

Taşdemirci, Alper; Kara, Ali; Turan, Kivanc; Sahin, Selim

doi:10.1016/j.tws.2015.02.015

Cited by 14 publications

(9 citation statements)

References 30 publications

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“…The quasi-static and dynamic deformation behavior of the tested as received combined geometry shells and their sandwiches were recently investigated in Refs. [29] and [30] by the same authors. Previous results revealed that failure/fracture of few specimens occurred during crushing, imparting the energy dissipating capability.…”

Section: Introductionmentioning

confidence: 92%

Effect of heat treatment on the blast loading response of combined geometry shell core sandwich structures

Taşdemirci

Kara

Turan

et al. 2016

Thin-Walled Structures

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a b s t r a c tThe effect of heat treatment on the dynamic crushing and energy absorption behavior of combined geometry shell cores (hemisphere and cylinder) of sandwich structures were investigated both experimentally and numerically. The applied heat treatment on the combined geometry shell cores relieved the stress caused by deep drawing, diminishing the peak transmitted forces. The verified numerical models of the as-received and heat-treated combined geometry shells were used to model blast loading of various sandwich configurations and the additional sandwich configurations of reversing the cylindrical side of the cores to the impacted side. Both the applied heat-treatment and the reversing process decreased the magnitude of the force transmitted to the protected structure. The applied heat treatment increased the arrival time of blast force wave to the protected structure, while the reversing resulted in opposite.

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Section: Introductionmentioning

confidence: 92%

Effect of heat treatment on the blast loading response of combined geometry shell core sandwich structures

Taşdemirci

Kara

Turan

et al. 2016

Thin-Walled Structures

Self Cite

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“…The values of the contact energy E c versus the corresponding values of the peak load F max were plotted in a bilogarithmic scale and a linear regression was realised to determine the contact parameters (n, K i ), as presented in Figure 15; the value of n was obtained by the slope a of the linear equation according to equation (5) and the value of K i by the constant term b of the linear equation according to equation (6).…”

Section: Energy Balance Modelmentioning

confidence: 99%

“…An advantage of sandwich structures is that it is possible to design them in order to obtain the desired properties according to their specific application by varying different parameters (materials and thicknesses of core and face sheet), filling them with foam [5], applying GFRP outer skins [4], using different and innovative types of core (core with combined geometry shells [6], open-cell truss core [7], ‘tied-core’ [8]).…”

Section: Introductionmentioning

confidence: 99%

Theoretical and experimental analysis for the impact response of glass fibre reinforced aluminium honeycomb sandwiches

Crupi

Kara

Guglielmino

et al. 2016

Jnl of Sandwich Structures & Materials

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Honeycomb sandwich structures are increasingly used in the automotive, aerospace and shipbuilding industries where fuel savings, increase in load carrying capacity, vehicle safety and decrease in gas emissions are very important aspects. The aim of this study was to develop the theoretical methods, initially proposed by the authors and by other researchers for the prediction of low-velocity impact responses of sandwich structures. The developed methods were applied to sandwich structures with aluminium honeycomb cores and glass-epoxy facings for the assessment of impact parameters and for the prediction of limit loads. The values of model parameters were compared with data reported in literature and the predictions of the limit loads were validated by means of the experimental data. Good achievement was obtained between the results of the theoretical models and the experimental data. The failure mode and the internal damage of the sandwich panels have been investigated using 3D computed tomography, which allowed the evaluation of parameters of energy balance model, and infrared thermography, which allowed the detection of the temperature evolution of the specimens during the tests. The experimental and theoretical results demonstrated that the use of glass-epoxy reinforcement on aluminium honeycomb sandwiches enhances the energy absorption and load carrying capacities.

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“…Current studies on sandwich structures mainly focus on bending properties, [1][2][3][4][5][6] compressive properties, [7][8][9][10][11][12] and energy absorption properties. [13][14][15][16][17][18][19][20] The basic form of the sandwich structure currently used in engineering applications consists of two thin, strong face plates and a lightweight core material that is filled between the face plates and firmly connected to them. There are many materials used for the face plates, such as aluminum, stainless steel, composite laminates etc.…”

Section: Introductionmentioning

confidence: 99%

Review of carbon fiber-reinforced sandwich structures

Zhao

Yang

Chen

et al. 2022

Polymers and Polymer Composites

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This paper first reviews the research progress of carbon fiber-reinforced sandwich plates with grid cores, truss cores, and foam cores, and the results can be summarized in the following four points. 1) The load-bearing capacity and energy absorption capacity of grid-core and foam-core structures under bending loads have been improved by toughening with short fibers and Z-pinned fibers. 2) The progressive buckling mode of the core layer under compressive loading can significantly improve the energy absorption capacity of a sandwich structure. 3) The compressive failure of a truss-core sandwich structure is closely related to the strength at the nodes. 4) Following a literature review, this paper discusses the existing problems in sandwich structures and the corresponding countermeasures, and the results can be summarized in the following two points. 1) After implementing the current toughening measures, the debonding is improved to a certain extent; however, this approach does not prevent debonding. 2) No method has been presented that can increase the strength of the end nodes in truss-core members. Therefore, it is encouraging that a trabeculae/honeycomb-core sandwich structure composed of fiber-reinforced proteins—mimicking the biological structure found in a beetle forewing—can effectively solve the abovementioned problems.

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Dynamic crushing and energy absorption of sandwich structures with combined geometry shell cores

Cited by 14 publications

References 30 publications

Effect of heat treatment on the blast loading response of combined geometry shell core sandwich structures

Effect of heat treatment on the blast loading response of combined geometry shell core sandwich structures

Theoretical and experimental analysis for the impact response of glass fibre reinforced aluminium honeycomb sandwiches

Review of carbon fiber-reinforced sandwich structures

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