Flexural properties of sandwich composite panels with glass laminate aluminum reinforced epoxy facesheets strengthened by SMA wires

2020 ◽  
Vol 89 ◽  
pp. 106641 ◽  
Author(s):  
S. Khalili ◽  
S.M.R. Khalili ◽  
R. Eslami Farsani ◽  
P. Mahajan
Keyword(s):  
Sandwich Composite ◽  
Flexural Properties ◽  
Composite Panels ◽  
Glass Laminate

scholarly journals Evaluation of the influence of design in the mechanical properties of honeycomb cores used in composite panels

2021 ◽  
pp. 146442072098519
Author(s):  
A Miranda ◽  
M Leite ◽  
L Reis ◽  
E Copin ◽  
MF Vaz ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polylactic Acid ◽  
Failure Modes ◽  
Industrial Applications ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Distribution Analysis ◽  
Absorbed Energy ◽  
Fused Filament Fabrication ◽  
Subtractive Manufacturing

The aerospace, automotive, and marine industries are heavily reliant on sandwich panels with cellular material cores. Although honeycombs with hexagonal cells are the most commonly used geometries as cores, recently there have been new alternatives in the design of lightweight structures. The present work aims to evaluate the mechanical properties of metallic and polymeric honeycomb structures, with configurations recently proposed and different in-plane orientations, produced by additive and subtractive manufacturing processes. Structures with configurations such as regular hexagonal honeycomb (Hr), lotus (Lt), and hexagonal honeycomb with Plateau borders (Pt), with 0°, 45°, and 90° orientations were analyzed. To evaluate its properties, three-point bending tests were performed, both experimentally and by numerical modeling, by means of the finite element method. Honeycombs of two aluminum alloys and polylactic acid were fabricated. The structures produced in aluminum were obtained either by selective laser melting technology or by machining, while polylactic acid structures were obtained by material extrusion using fused filament fabrication. From the stress distribution analysis and the load–displacement curves, it was possible to evaluate the strength, stiffness, and absorbed energy of the structures. Failure modes were also analyzed for polylactic acid honeycombs. In general, a strong correlation was observed between numerical and experimental results. The results show that the stiffness and absorbed energy increase in the order, Hr, Pt, Lt, and with the orientation through the sequence, 45°, 90°, 0°. Thus, Lt structures with 0° orientation seem to be good alternatives to the traditional honeycombs used in sandwich composite panels for those industrial applications where low weight, high stiffness, and large energy-absorbing capacity are required.

Damage behavior of potting materials in sandwich composites with pinned joints

2015 ◽  
Vol 22 (5) ◽  
Author(s):  
Cesim Atas ◽  
Alper Basmaci
Keyword(s):  
Core Material ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Sandwich Composites ◽  
Resin Infusion ◽  
Damage Behavior ◽  
Mechanical Joints ◽  
The Core ◽  
Bottom Face ◽  
Infusion Technique

AbstractThe damage behavior of the potting materials around a pinhole, being used in the mechanical joints of sandwich composites, is investigated experimentally. The sandwich composite panels used in the tests were manufactured by the vacuum-assisted resin infusion technique. Each of the top and bottom face sheets of the panels consisted of two woven E-glass/epoxy layers. As the core material, PVC foam (AIREX

Flexural properties of sandwich composite laminates reinforced with glass and carbon Z-pins

2018 ◽  
Vol 53 (10) ◽  
pp. 1347-1359 ◽  
Author(s):  
Erdem Selver ◽  
Gaye Kaya
Keyword(s):  
Carbon Fibre ◽  
Composite Laminates ◽  
Interfacial Bonding ◽  
Sandwich Composite ◽  
Flexural Properties ◽  
Sandwich Composites ◽  
Flexural Behaviour ◽  
Face Type ◽  
Carbon Rods ◽  
Glass Rods

This study aims to enhance the flexural properties of sandwich composites made from glass or carbon face and glass and carbon fibre Z-pin inserted extruted-polystyrene (XPS) foam cores. Carbon and glass pins were placed through XPS foams with two different column and row densities (15 and 30 mm). Results indicated that flexural loads, strength and modulus of glass/XPS and carbon/XPS sandwich composites significantly increased after inserting of glass and carbon rods. Core shear strengths and facing stresses of glass/XPS and carbon/XPS increased by increasing of carbon or glass rod densities. The rod type, rod density and face type of the sandwich composites are considered as significant parameters which affect the flexural behaviour of sandwich composites while using carbon rods enhanced flexural properties more than that of using glass rods due to better interfacial bonding.

Joining by forming of metal–polymer sandwich composite panels

2018 ◽  
Vol 233 (10) ◽  
pp. 2089-2098 ◽  
Author(s):  
João PM Pragana ◽  
Tomás RM Contreiras ◽  
Ivo MF Bragança ◽  
Carlos MA Silva ◽  
Luis M Alves ◽  
...  
Keyword(s):  
Adhesive Bonding ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Forming Process ◽  
Joining By Forming ◽  
Bulk Forming ◽  
New Concepts ◽  
Mechanical Fastening ◽  
Mortise And Tenon ◽  
Metal Polymer

This article presents new joining-by-forming processes to assemble longitudinally two metal–polymer sandwich composite panels perpendicular to one another. Process design draws from an earlier development of the authors for metal sheets to new concepts based on the combination of sheet-bulk forming with mortise-and-tenon joints. Selected examples obtained from experimentation and finite element modelling give support to the presentation. A new three-stage joining by the forming process is capable of producing mechanically locked joints with larger and stiffer flat-shaped heads than those fabricated by alternative single- or two-stage solutions. Failure in the new three-stage joining by the forming process is found to take place by cracking instead of disassembling after unbending the flat-shaped head of the joint back to its original shape. The required forming forces to produce the new metal–polymer joints are below 15 kN, allowing them to be an effective, easy-to-implement alternative to existing solutions based on adhesive bonding, welding and mechanical fastening.

On the compression of hybrid sandwich composite panels reinforced with internal tube inserts: experimental

2002 ◽  
Vol 56 (2) ◽  
pp. 191-199 ◽  
Author(s):  
A.G Mamalis ◽  
D.E Manolakos ◽  
M.B Ioannidis ◽  
D.P Papapostolou ◽  
P.K Kostazos ◽  
...  
Keyword(s):  
Sandwich Composite ◽  
Composite Panels

Enhancement of energy absorption by incorporation of shear thickening fluids in 3D-mat sandwich composite panels upon ballistic impact

2019 ◽  
Vol 225 ◽  
pp. 111148 ◽  
Author(s):  
Victor Avisek Chatterjee ◽  
Sanjeev Kumar Verma ◽  
Debarati Bhattacharjee ◽  
Ipsita Biswas ◽  
Swati Neogi
Keyword(s):  
Energy Absorption ◽  
Shear Thickening ◽  
Ballistic Impact ◽  
Sandwich Composite ◽  
Composite Panels ◽  
Shear Thickening Fluids
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