Drop weight impact behaviour of sandwich panels with metallic micro lattice cores

Mines, R. A. W.; Tsopanos, S.; Shen, Yiou; Rakhshandeh, Hasan; McKown, S.

doi:10.1016/j.ijimpeng.2013.04.007

Cited by 205 publications

(91 citation statements)

References 29 publications

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“…[1][2][3][4][5][6][7]. The motivation for much of this research has been so that they might be used in high-performance, lightweight, applications; for example in simultaneous structural lightweighting, sound dampening and crash energy absorption in motor vehicles and aircraft, with the ultimate aim being to provide high levels of safety and comfort for passengers, whilst minimising resource consumption and the generation of greenhouse gases.…”

Section: Introductionmentioning

confidence: 99%

A mechanical property evaluation of graded density Al-Si10-Mg lattice structures manufactured by selective laser melting

Maskery

Aboulkhair

Aremu

et al. 2016

Materials Science and Engineering: A

529

139

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Metal components with applications across a range of industrial sectors can be manufactured by selective laser melting (SLM). A particular strength of SLM is its ability to manufacture components incorporating periodic lattice structures not realisable by conventional manufacturing processes. This enables the production of advanced, functionally graded, components. However, for these designs to be successful, the relationships between lattice geometry and performance must be established. We do so here by examining the mechanical behaviour of uniform and graded density SLM Al-Si10-Mg lattices under quasistatic loading. As-built lattices underwent brittle collapse and non-ideal deformation behaviour. The application of a microstructure-altering thermal treatment drastically improved their behaviour and their capability for energy absorption. Heat-treated graded lattices exhibited progressive layer collapse and incremental strengthening. Graded and uniform structures absorbed almost the same amount of energy prior to densification, 6.3 ± 0.2 MJ/m 3 and 5.7 ± 0.2 MJ/m 3 , respectively, but densification occurred at around 7% lower strain for the graded structures. Several characteristic properties of SLM aluminium lattices, including their effective elastic modulus and Gibson-Ashby coefficients, C 1 and α, were determined; these can form the basis of new design methodologies for superior components in the future.

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Section: Introductionmentioning

confidence: 99%

A mechanical property evaluation of graded density Al-Si10-Mg lattice structures manufactured by selective laser melting

Maskery

Aboulkhair

Aremu

et al. 2016

Materials Science and Engineering: A

529

139

View full text Add to dashboard Cite

show abstract

“…Precipitation-hardened (PH) stainless steels have been widely used as structural materials and related applications in marine environments, power plants (light water and pressurized water reactors) and chemical industries because of their good [17][18][19], whereas research on precipitation hardening steel is quite limited [20]. Studies on SLM stainless steel structure as core material in sandwich construction showed that this material has significant potential that merits further examination and analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Such structures have advantages over monolithic shells, such as improved specific bending stiffness and strength, and multifunction potential, e.g. acoustic and thermal properties [17]. In this paper, different topology structures have been studied.…”

Section: Introductionmentioning

confidence: 99%

Manufacturing and characterization of similar to foam steel components processed through selective laser melting

Campanelli

Cardaropoli

Contuzzi

et al. 2017

Int J Adv Manuf Technol

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The growing interest from the industry for lightweight metal components has driven the development of processes that would allow creating lightweight high melting point metals as steels, able to guarantee mechanical characteristics superior to existing foam (typically aluminium), without penalizing one of the characteristics that cell structures have: lightness. Conventional manufacturing methods, such as casting, however, face difficulty in making complex periodic steel structures with designed shape and size and volume fraction. This study evaluates the manufacturability and performance of lightweight 17-4 PH steel components with spherical porosity fabricated via selective laser melting (SLM). Samples were designed and fabricated with the purpose to produce a structure similar to foam. Built samples were characterized in terms of dimensional accuracy, mechanical strength under compression and energy absorbed per unit mass. The designed structures have a designed relative density or volume fraction ranging between 31.1 and 32.8%.

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“…[2][3][4]. Research can thus focus on either different core materials including foams, honeycomb, cork, balsa wood, coconut and other artificially constructed truss or sheet structures [4][5][6][7][8][9][10][11] or different face sheets as aluminium, carbon, glass, aramid reinforced composites etc. [3,12].…”

Section: Introductionmentioning

confidence: 99%

Experimental study of impact properties of aluminium honeycomb sandwich structure

2017

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Abstract. Aircraft grade of structural sandwich plates has been studied to determine the influence rate of particular face sheets adjustments on impact energy absorption. The face sheets were fabricated by carbon fibre reinforced plastic (CFRP) laminas using unidirectional reinforcement with either cross-ply [0/90]n or angle-ply [±45]n orientation of fibres. A core of the sandwich plates was then formed by aluminium honeycomb. The impact properties of small unnotched sandwich specimens were measured by instrumented Charpy impact test device. Assessment of force-displacement curve, loading process and failure mode was carried out for each specimen type to determine a general trend for increasing the impact properties of sandwich structures.

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Drop weight impact behaviour of sandwich panels with metallic micro lattice cores

Cited by 205 publications

References 29 publications

A mechanical property evaluation of graded density Al-Si10-Mg lattice structures manufactured by selective laser melting

A mechanical property evaluation of graded density Al-Si10-Mg lattice structures manufactured by selective laser melting

Manufacturing and characterization of similar to foam steel components processed through selective laser melting

Experimental study of impact properties of aluminium honeycomb sandwich structure

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