A comparative study of blast resistance of cylindrical sandwich panels with aluminum foam and auxetic honeycomb cores

Lan, Xuke; Feng, Shunshan; Huang, Qi; Zhou, Tianfei

doi:10.1016/j.ast.2019.01.031

Cited by 100 publications

(28 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…13,16,17 Intensive research was carried out by several researchers to study the mechanical behavior of cellular materials or of honeycomb sandwich panels under different loading conditions. 2,10,11,13,[18][19][20][21][22][23] The most widely studied and used core is the conventional honeycomb made by the repetition of equal hexagonal cells. 2,24 However, hexagonal honeycombs show lower in-plane strength in comparison with the out-plane behavior.…”

Section: Introductionmentioning

confidence: 99%

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

Miranda

Leite

Reis

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Miranda

Leite

Reis

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part L:

View full text Add to dashboard Cite

show abstract

“…The simulations show that the effect of chiral unit cell amplitude on the maximum deflection and SEA is, in most analyzed cases, negligible in comparison to the one of cell length, which is more prominent. The superiority of cylindrical re-entrant honeycomb sandwich structures over aluminum foam core ones was also highlighted by Lan et al [48] using an empirical ConWep approach. All experiments and numerical simulations conducted above demonstrated clearly the flow of the material towards the blast-loaded region, thus stiffening of the auxetic structures in the blast location, which is one of the most significant advantages for auxetic structures in blast protection and impact engineering.…”

Section: Introductionmentioning

confidence: 80%

Design and modelling of auxetic double arrowhead honeycomb core sandwich panels for performance improvement under air blast loading

Chen

Cheng

Zhang

et al. 2020

Jnl of Sandwich Structures & Materials

View full text Add to dashboard Cite

In the present study, a 2D-based large-scale metallic auxetic double arrowhead honeycomb core sandwich panel (DAHSP) was proposed and its deformation response, energy dissipation characteristics and associated mechanisms under air blasts were investigated using a validated numerical model. It aims at the performance improvement of DAHSPs through the design of core relative density with respect to different strategies. The DAHSPs considered mainly experienced a local dome superimposed upon global deformation of front face and global deformation of back face, while the core webs were heavily buckled and progressively collapsed. The results confirmed the material concentration effect of DAH cores induced by the negative Poisson’s ratio (NPR). It was found that the panel deformation response was highly related to their deformation/failure mechanisms. Relative to core web thickness, the increase of number of core layers led to a more remarkable decrease in permanent deflections. However, the decline of inclined angles not always reduced the back face deflection due to the competition between enhanced bending stiffness and deteriorated local contact force. An ideal means to decrease the panel deformation is to enlarge the inclined angles at low relative density but to decrease the horizontal distance when the relative density increases to a high level. The panel with thinner core webs at low relative density and the panel with narrowed inclined angles at high relative density is more beneficial to plastic energy absorption. In addition, a core configuration with a thinner tendon but a thicker stuffer promoted the exploitation of NPR and further improved the panel energy absorption.

show abstract

“…where E i was the modulus of the indenter, υ and υ i were the Poisson's ratio for the specimen and the indenter, respectively. The values E i = 1141 GPa, υ i = 0.07 [37] for the indenter, υ = 0.33 for the aluminum matrix and υ = 0.30 for the carbon fiber [38] were used in all computations. The effective elastic modulus, E r , which accounts for elastic displacements in both the specimen and the indenter, was evaluated from…”

Section: Methodsmentioning

confidence: 99%

The Evolution of Interfacial Microstructure and Fracture Behavior of Short Carbon Fiber Reinforced 2024 Al Composites at High Temperature

Zhang

Meng

et al. 2019

Applied Sciences

View full text Add to dashboard Cite

The short carbon fiber reinforced 2024 Al composites were fabricated through powder metallurgy. The effect of short carbon fiber content on the interfacial microstructure and fracture behavior of the composites at different temperatures were investigated. The results showed that the dislocation accumulation was formed in the aluminum matrix due to the thermal expansion mismatch between carbon fiber and aluminum matrix. With the testing temperature increasing, the size of interfacial product Al4C3 and precipitates Al2Cu became larger, and the segregation of Al2Cu was found coarsening around Al4C3. The addition of short carbon fiber improved the hardness and modulus of the aluminum matrix in the vicinity of the interface between carbon fiber and aluminum matrix. Compared to the matrix 2024 Al, the yield strength and ultimate tensile strength of the composites first increased and then decreased with increasing short carbon fiber content at room temperature 423 Kand 523 K. The fracture surface of the composites at room temperature was characterized by shear failure of fiber, while the interface debonding and fiber pulled-out became predominant fracture morphologies for the fracture surface at increased temperatures.

show abstract

A comparative study of blast resistance of cylindrical sandwich panels with aluminum foam and auxetic honeycomb cores

Cited by 100 publications

References 20 publications

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

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

Design and modelling of auxetic double arrowhead honeycomb core sandwich panels for performance improvement under air blast loading

The Evolution of Interfacial Microstructure and Fracture Behavior of Short Carbon Fiber Reinforced 2024 Al Composites at High Temperature

Contact Info

Product

Resources

About