Impact performance enhancement of honeycombs through additive manufacturing-enabled geometrical tailoring

Andrew, J. Jefferson; Ubaid, Jabir; Hafeez, Farrukh; Schiffer, Andreas; Kumar, Sandeep

doi:10.1016/j.ijimpeng.2019.103360

Cited by 53 publications

(27 citation statements)

References 42 publications

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“…Plate-lattice specimens with a low relative density showed the most favorable deformation pattern through smashing the specimens into multiple small pieces of debris or sub-cells (progressive local brittle failure) [4]. On the contrary, high relative density specimens were smashed into finite number of pieces.…”

Section: Effect Of Relative Densitymentioning

confidence: 99%

“…Cellular structures are produced by appropriately combining solid material and void space to reduce the effective density [3] and are therefore extensively used for energy absorbing protective devices and packing [4]. These structures can endure a large compressive strain at almost a constant stress, absorbing a large amount of energy devoid of transferring a high stress to the protected object [5,6].…”

Section: Introductionmentioning

confidence: 99%

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Energy absorption characteristics of additively manufactured plate-lattices under low- velocity impact loading

Andrew

Schneider

Ubaid

et al. 2021

International Journal of Impact Engineering

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Section: Effect Of Relative Densitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Energy absorption characteristics of additively manufactured plate-lattices under low- velocity impact loading

Andrew

Schneider

Ubaid

et al. 2021

International Journal of Impact Engineering

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“…It is an emerging technology where structures are printed layer by layer with the help of computer-aided design (CAD) models. Popular AM techniques include fused filament fabrication (FFF) [4,[10][11][12][13], selective laser sintering (SLS) [14,15], digital light processing (DLP) [16][17][18] and stereolithography (SLA) [19][20][21][22][23][24]. FFF has several advantages including simplicity of operation, lower cost of fabrication compared to conventional methods, e.g.…”

Section: Introductionmentioning

confidence: 99%

Essential work of fracture assessment of acrylonitrile butadiene styrene (ABS) processed via fused filament fabrication additive manufacturing

Verma

Ubaid

Schiffer

et al. 2021

Int J Adv Manuf Technol

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Experiments and finite element (FE) calculations were performed to study the raster angle–dependent fracture behaviour of acrylonitrile butadiene styrene (ABS) thermoplastic processed via fused filament fabrication (FFF) additive manufacturing (AM). The fracture properties of 3D-printed ABS were characterized based on the concept of essential work of fracture (EWF), utilizing double-edge-notched tension (DENT) specimens considering rectilinear infill patterns with different raster angles (0°, 90° and + 45/− 45°). The measurements showed that the resistance to fracture initiation of 3D-printed ABS specimens is substantially higher for the printing direction perpendicular to the crack plane (0° raster angle) as compared to that of the samples wherein the printing direction is parallel to the crack (90° raster angle), reporting EWF values of 7.24 kJ m−2 and 3.61 kJ m−2, respectively. A relatively high EWF value was also reported for the specimens with + 45/− 45° raster angle (7.40 kJ m−2). Strain field analysis performed via digital image correlation showed that connected plastic zones existed in the ligaments of the DENT specimens prior to the onset of fracture, and this was corroborated by SEM fractography which showed that fracture proceeded by a ductile mechanism involving void growth and coalescence followed by drawing and ductile tearing of fibrils. It was further shown that the raster angle–dependent strength and fracture properties of 3D-printed ABS can be predicted with an acceptable accuracy by a relatively simple FE model considering the anisotropic elasticity and failure properties of FFF specimens. The findings of this study offer guidelines for fracture-resistant design of AM-enabled thermoplastics. Graphical abstract

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“…Additive manufacturing (AM) (aka 3D printing (3DP))-enabled materials development is gaining greater attention due to the design freedom it offers [13][14][15][16][17]. 3DP enables the realization of complex structures [18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic interference shielding performance of carbon nanostructure reinforced, 3D printed polymer composites

Verma

Bansala

Chauhan³

et al. 2021

J Mater Sci

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We report the electrical, mechanical and electromagnetic interference (EMI) shielding performance of polypropylene random copolymer (PPR)/multi-wall carbon nanotube (MWCNT) nanocomposites enabled via customized fused filament fabrication process. The electro-conductive PPR/MWCNT filament feedstocks were fabricated via shear-induced melt-blending process that allows 3D printing of nanoengineered composites even at higher MWCNT loading (up to 8 wt%). The uniform dispersion of MWCNTs in PPR matrix confirmed via Raman spectroscopy and scanning electron microscopy facilitates better mechanical, electrical and EMI shielding performance. The results furthermore show enhanced shielding properties and higher attenuation for the nanocomposites printed in 90° direction (~ − 37 dB for 8 wt% MWCNT loading). Effective interfacial adhesion between the beads with lesser extent of voids (confirmed via micro-computed tomography) endorsed low transmission loss in nanocomposites printed in 90° direction compared to samples printed in 0° direction. Surface architected structure (frustum shape) reveals higher specific shielding effectiveness (maximum ~ − 40 dBg−1cm3, + 38%) over the plain structure. The realization of excellent shielding effectiveness (~ 99.9% attenuation) of additive manufacturing-enabled PPR/MWCNT nanocomposites demonstrates their potential for lightweight and strong EMI shields. Graphical Abstract

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Impact performance enhancement of honeycombs through additive manufacturing-enabled geometrical tailoring

Cited by 53 publications

References 42 publications

Energy absorption characteristics of additively manufactured plate-lattices under low- velocity impact loading

Energy absorption characteristics of additively manufactured plate-lattices under low- velocity impact loading

Essential work of fracture assessment of acrylonitrile butadiene styrene (ABS) processed via fused filament fabrication additive manufacturing

Electromagnetic interference shielding performance of carbon nanostructure reinforced, 3D printed polymer composites

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