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The milling of aluminum honeycomb structures represents today an important scientific and technical research topic for many industrial applications: aerospace, aeronautic, automotive, and naval. The difficulties encountered when milling this type of materials are linked to the small thickness of the walls constituting the honeycomb cells and the ductility of the material structure. The milling of cellular composite structures requires specific and rigorous tools. In the present work, a 3D numerical modeling of the milling process of aluminum honeycombs has been developed using Abaqus Explicit software. The effect of milling parameters, such as the spindle speed, the tilt angle, and the depth of cut, has been particularly investigated in terms of cutting forces, surface integrity, and chip morphology. To properly analyze and optimize the cutting process, experimental validation was done through milling tests with different cutting conditions. The comparison between numerical simulations and experimental tests shows that the three-dimensional model correctly reproduces the milling of this type of structure. [ABSTRACT FROM AUTHOR]

A new type of pier anti-collision composite structure composed of honeycomb steel and polyurethane (PU) elastomer was proposed in this study. The impacts of the shape and filling materials of inner core cells on the failure mode, load–displacement cure, bearing capacity, structural stability, and energy absorption were studied by conducting uniaxial compression tests on device segments. Test results showed that the bearing capacity, structural stability, and energy absorption of honeycomb steel structure were significantly improved by PU elastomer filling. Besides, when compared with the square honeycomb structure and the regular hexagon honeycomb structure, the maximum values of average load, total energy absorption (TEA), and specific energy absorption (SEA), which were 69.6 kN, 1986.1 J, and 1300 J/kg, respectively, for the regular triangle honeycomb structure without PU filling, increased to 459.3%, 376.38%, and 212.5%, respectively, for the regular hexagonal core cell structure with PU filling, which was proved to be the most suitable core structure for pier anti-collision device. [ABSTRACT FROM AUTHOR]

• The well-formed honeycomb preform and composite were prepared and investigated. • HCWI composite with fine in situ TiC x framework exhibited excellent properties. • Transition zone owned high hardness, low friction coefficient, wear depth and EWF. The well-formed porous Ti 3 AlC 2 preform with honeycomb structure using mold forming method, and TiC x /high chromium white iron (TiC x /HCWI) composite with fine TiC x framework formed by porous Ti 3 AlC 2 preform in situ decomposition using pressureless infiltration method were successfully prepared, respectively. The HCWI composite with fine in situ TiC x framework exhibited excellent properties. The transition zone between framework and HCWI with the highest hardness, the minimum friction coefficient, wear depth and electronic work function (EWF) may protect the whole sample during wear. [ABSTRACT FROM AUTHOR]

Experimental results on the detection of latent water in a honeycomb fiberglass structure using terahertz thermography are presented. These data are compared with data that were obtained using active infrared thermography. [ABSTRACT FROM AUTHOR]

[Display omitted] • PLA/TPU filament for 3D printing was obtained by a screw extruder. • Continuous carbon fiber reinforced PLA/TPU honeycomb structure was prepared. • The self-sensing of strain and damage during cyclic compression was investigated. • The self-sensing of temperature change of honeycomb structure was achieved. Polylactic acid/thermoplastic polyurethanes (PLA/TPU) filament for 3D printing was prepared by screw extruder, and continuous carbon fiber-reinforced PLA/TPU honeycomb structure was fabricated by continuous fiber 3D printer, and the self-sensing performance of the structure during cyclic compression was investigated. The results show that the strain and damage can be sensed by the change of electrical resistance in the honeycomb structure during cyclic compression at small-strain (ε = 0.04) and large-strain (ε = 0.4). Meanwhile, the temperature monitoring of the honeycomb structure can be realized by the change of electrical resistance in the honeycomb structure. This study provides the possibility for developing and applying 3D printed continuous carbon fiber composite smart structures and structural health monitoring. [ABSTRACT FROM AUTHOR]