Effect of SWCNTs content and relative density on the energy absorption capabilities of closed-cell Al-cenosphere-SWCNTs hybrid foam

Controllable Design of Structural and Mechanical Behaviors of Al–Si Foams by Powder Metallurgy Foaming

“…[3,50] The structure constant and coefficient are influenced by cellular morphology, matrix materials, cellular wall thickness, type of deformation, etc. [3,35] Due to high value of R 2 , it is evident that the fitting curves of Al-Si foams concur with Gibson and Ashby's formula. Compared to hypoeutectic Al-Si foams, AlSi12 exists more deviated points in the low relative density region.…”

“…Over this stage, the weakest cell wall regions show four different types of failure patterns, including buckling, tearing, shearing stretching, and combination function. [11,[32][33][34][35] Meanwhile, the cracks propagate through the Al matrix and form deformation regions or deformation bonds, presenting two types of localized deformation bands: shear deformation bands and layer-by-later deformation bands that depend on the ductility of matrix. [6,32,34] Finally, most of deformation bands enter to densification stage and then the Al alloy foam collapses.…”

Preparation and mechanism study of intrinsic hard segment flame‐retardant polyurethane foam

“…On the one hand, the primary hydroxyl group in THPO has high reactivity, and it is easier to bind the generated gas in the foam cell to form closed‐cell structure, which is consistent with SEM observations. The existence of closed‐cell structure is conducive to improving the compressive strength and Young's modulus of PUFs 57,58 . On the other hand, THPO is a small molecule polyether with trifunctionalities, which promotes the cross‐linking density of the system, which is beneficial to the enhancement of both the compression strength and Young's modulus of PUFs.…”

“…The existence of closed-cell structure is conducive to improving the compressive strength and Young's modulus of PUFs. 57,58 On the other hand, THPO is a small molecule polyether with trifunctionalities, which promotes the cross-linking density of the system, which is beneficial to the enhancement of both the compression strength and Young's modulus of PUFs.…”

Characterization of Closed‐Cell Aluminum Foam‐Polyurethane Composites under Cyclic Compression

“…[1][2][3][4] The cellular structure of AF plays a key role in the properties mentioned earlier. To further enhance the mechanical properties of AF, several kinds of AF-based composites [5][6][7][8][9][10][11][12][13][14][15] have been proposed. They are commonly used in energy absorbers for improving the crashworthiness of structures.…”